TY  - JOUR
AU  - Janošević-Ležaić, Aleksandra
AU  - Bajuk-Bogdanović, Danica
AU  - Ćirić-Marjanović, Gordana
PY  - 2024
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5612
AB  - In situ Raman spectroscopy was used for the first time to study the reaction intermediates/products of the
oxidative polymerization of aniline to polyaniline (PANI) with peroxydisulfate in aqueous solutions of different
initial acidity. Raman spectra were recorded for the drops of reaction mixture taken at various reaction times.
Five reaction systems with different pH of the monomer solution (pHmon), leading to 1-D nanostructured PANIs
(pHmon =5.8, 4.6 and 4.5) and granular PANIs (pHmon= 3.4 and 1.0) were explored. Spectral characteristics of
different reaction phases - athermal, exothermic and post-propagation were identified and correlated with the
proposed mechanisms of aniline polymerization and nanostructures formation. For the nanostructured PANIs,
the athermal phase was characterized by pronounced strengthening of the δ(N H)/ν(C––N)Q band at
1510–1520 cm 1, while the characteristic of the second exothermic phase was the strengthening of the ν(C~C)B/
ν(C~C)Phz band at c.a. 1636 cm 1 which becomes stronger than the ν(C––C)Q/ν(C~C)SQ band at c.a. 1590 cm–1.
For granular PANIs, the band at 1590 cm–1 was stronger than that at 1630 cm–1 for all reaction phases. For all
reaction systems, characteristic feature of the post-propagation phase was strengthening of the ν(C~N+•) band at
1330–1340 cm 1 due to delocalized polarons. For granular PANIs, the band associated with phenazine-like units
at c.a. 1415 cm 1 disappeared after the exothermic phase, while for nanostructured PANIs it was seen until the
end of the reaction. The obtained results are expected to be useful in further investigations of the intermediates/
products and mechanisms of polymerizations of other aromatic amines.
PB  - Elsevier
T2  - Synthetic Metals  Synthetic Metals
T1  - In situ Raman spectroscopy study of the oxidative polymerization of aniline in media of different acidity
VL  - 305
SP  - 117602
DO  - 10.1016/j.synthmet.2024.117602
ER  - 

@article{
author = "Janošević-Ležaić, Aleksandra and Bajuk-Bogdanović, Danica and Ćirić-Marjanović, Gordana",
year = "2024",
abstract = "In situ Raman spectroscopy was used for the first time to study the reaction intermediates/products of the
oxidative polymerization of aniline to polyaniline (PANI) with peroxydisulfate in aqueous solutions of different
initial acidity. Raman spectra were recorded for the drops of reaction mixture taken at various reaction times.
Five reaction systems with different pH of the monomer solution (pHmon), leading to 1-D nanostructured PANIs
(pHmon =5.8, 4.6 and 4.5) and granular PANIs (pHmon= 3.4 and 1.0) were explored. Spectral characteristics of
different reaction phases - athermal, exothermic and post-propagation were identified and correlated with the
proposed mechanisms of aniline polymerization and nanostructures formation. For the nanostructured PANIs,
the athermal phase was characterized by pronounced strengthening of the δ(N H)/ν(C––N)Q band at
1510–1520 cm 1, while the characteristic of the second exothermic phase was the strengthening of the ν(C~C)B/
ν(C~C)Phz band at c.a. 1636 cm 1 which becomes stronger than the ν(C––C)Q/ν(C~C)SQ band at c.a. 1590 cm–1.
For granular PANIs, the band at 1590 cm–1 was stronger than that at 1630 cm–1 for all reaction phases. For all
reaction systems, characteristic feature of the post-propagation phase was strengthening of the ν(C~N+•) band at
1330–1340 cm 1 due to delocalized polarons. For granular PANIs, the band associated with phenazine-like units
at c.a. 1415 cm 1 disappeared after the exothermic phase, while for nanostructured PANIs it was seen until the
end of the reaction. The obtained results are expected to be useful in further investigations of the intermediates/
products and mechanisms of polymerizations of other aromatic amines.",
publisher = "Elsevier",
journal = "Synthetic Metals  Synthetic Metals",
title = "In situ Raman spectroscopy study of the oxidative polymerization of aniline in media of different acidity",
volume = "305",
pages = "117602",
doi = "10.1016/j.synthmet.2024.117602"
}

Janošević-Ležaić, A., Bajuk-Bogdanović, D.,& Ćirić-Marjanović, G.. (2024). In situ Raman spectroscopy study of the oxidative polymerization of aniline in media of different acidity. in Synthetic Metals  Synthetic Metals
Elsevier., 305, 117602.
https://doi.org/10.1016/j.synthmet.2024.117602

Janošević-Ležaić A, Bajuk-Bogdanović D, Ćirić-Marjanović G. In situ Raman spectroscopy study of the oxidative polymerization of aniline in media of different acidity. in Synthetic Metals  Synthetic Metals. 2024;305:117602.
doi:10.1016/j.synthmet.2024.117602 .

Janošević-Ležaić, Aleksandra, Bajuk-Bogdanović, Danica, Ćirić-Marjanović, Gordana, "In situ Raman spectroscopy study of the oxidative polymerization of aniline in media of different acidity" in Synthetic Metals  Synthetic Metals, 305 (2024):117602,
https://doi.org/10.1016/j.synthmet.2024.117602 . .

TY  - JOUR
AU  - Popadić, Daliborka
AU  - Krstić, Jugoslav
AU  - Janošević-Ležaić, Aleksandra
AU  - Popović, Maja
AU  - Milojević-Rakić, Maja
AU  - Ignjatović, Ljubiša
AU  - Bajuk-Bogdanović, Danica
AU  - Gavrilov, Nemanja
PY  - 2024
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5405
AB  - Reuse and/or recycling of spent adsorbents is taking a central role in modern thinking and catalyzed carbonization is the way forward. Herein we explore the carbonization of adsorbed acetamiprid, in an inert atmosphere, as a way of recycling and producing nitrogen-rich carbon material for potential use in supercapacitors. Added value material and the reuse of the adsorbent were achieved by carbonization at 700 °C under argon. The formation of a nitrogen-doped carbon layer as an active material on the adsorbent, bonded through a C-Si linkage, has been conclusively verified through elemental composition quantification using XPS and EDX measurements. Two-stage catalytic decomposition and condensation of the adsorbed pesticide is followed by TGA and TPD-MS. Attained carbon-based materials give stable Faradaic capacitance with a slight dependency on the number of adsorbing cycles. Capacitance calculated with respect to the adlayer carbon material reaches values as high as 610 F g−1. Galvanostatic Charge/Discharge measurement confirmed the stability of explored materials with a slight increase in capacitance over 1000 cycles. The presented results envisage electroactive materials preparation from environmental pollutants, adding value to spent adsorbents.
PB  - Elsevier B.V.
T2  - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
T1  - Acetamiprid's degradation products and mechanism: Part II – Inert atmosphere and charge storage
VL  - 308
DO  - 10.1016/j.saa.2023.123772
ER  - 

@article{
author = "Popadić, Daliborka and Krstić, Jugoslav and Janošević-Ležaić, Aleksandra and Popović, Maja and Milojević-Rakić, Maja and Ignjatović, Ljubiša and Bajuk-Bogdanović, Danica and Gavrilov, Nemanja",
year = "2024",
abstract = "Reuse and/or recycling of spent adsorbents is taking a central role in modern thinking and catalyzed carbonization is the way forward. Herein we explore the carbonization of adsorbed acetamiprid, in an inert atmosphere, as a way of recycling and producing nitrogen-rich carbon material for potential use in supercapacitors. Added value material and the reuse of the adsorbent were achieved by carbonization at 700 °C under argon. The formation of a nitrogen-doped carbon layer as an active material on the adsorbent, bonded through a C-Si linkage, has been conclusively verified through elemental composition quantification using XPS and EDX measurements. Two-stage catalytic decomposition and condensation of the adsorbed pesticide is followed by TGA and TPD-MS. Attained carbon-based materials give stable Faradaic capacitance with a slight dependency on the number of adsorbing cycles. Capacitance calculated with respect to the adlayer carbon material reaches values as high as 610 F g−1. Galvanostatic Charge/Discharge measurement confirmed the stability of explored materials with a slight increase in capacitance over 1000 cycles. The presented results envisage electroactive materials preparation from environmental pollutants, adding value to spent adsorbents.",
publisher = "Elsevier B.V.",
journal = "Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy",
title = "Acetamiprid's degradation products and mechanism: Part II – Inert atmosphere and charge storage",
volume = "308",
doi = "10.1016/j.saa.2023.123772"
}

Popadić, D., Krstić, J., Janošević-Ležaić, A., Popović, M., Milojević-Rakić, M., Ignjatović, L., Bajuk-Bogdanović, D.,& Gavrilov, N.. (2024). Acetamiprid's degradation products and mechanism: Part II – Inert atmosphere and charge storage. in Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Elsevier B.V.., 308.
https://doi.org/10.1016/j.saa.2023.123772

Popadić D, Krstić J, Janošević-Ležaić A, Popović M, Milojević-Rakić M, Ignjatović L, Bajuk-Bogdanović D, Gavrilov N. Acetamiprid's degradation products and mechanism: Part II – Inert atmosphere and charge storage. in Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy. 2024;308.
doi:10.1016/j.saa.2023.123772 .

Popadić, Daliborka, Krstić, Jugoslav, Janošević-Ležaić, Aleksandra, Popović, Maja, Milojević-Rakić, Maja, Ignjatović, Ljubiša, Bajuk-Bogdanović, Danica, Gavrilov, Nemanja, "Acetamiprid's degradation products and mechanism: Part II – Inert atmosphere and charge storage" in Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 308 (2024),
https://doi.org/10.1016/j.saa.2023.123772 . .

TY  - CONF
AU  - Marić, M.
AU  - Ivković, A.
AU  - Ivković, Branka
AU  - Janošević-Ležaić, Aleksandra
AU  - Uskoković-Marković, Snežana
AU  - Savić, J.
AU  - Milojević-Rakić, M.
AU  - Bajuk-Bogdanović, D.
PY  - 2023
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5448
AB  - ABSTRACT – Organic dyes from industry wastewater pollute water tables. Here proposed environmental 
solution relies on pristine red soil for oxidative degradation of methylene blue dye. Soil analysis comprised 
spectroscopic (FTIR and Raman) and microscopic (SEM/EDS) techniques, while spectrophotometry was 
applied for dye quantification. The dominant soil mineral is kaolinite, while Fe homogeneous distribution 
is witnessed in the γ-FeO(OH) form. Soil/Fenton reagent achieved substantial 93% dye removal. An optimal 
oxidant concentration in the Fenton system is 10 mM. We confirm the excellent performance of pristine 
red soil samples as naturally occurring adsorbents and catalysts in Fenton oxidation of environmental 
pollutants.
PB  - University of Belgrade
PB  - Technical Faculty in Bor
C3  - XV International Mineral Processing and Recycling Conference, 17-19 May 2023, Belgrade, Serbia
T1  - Removal of methylene blue from aqueous solutions using an iron-rich soil
UR  - https://hdl.handle.net/21.15107/rcub_farfar_5448
ER  - 

@conference{
author = "Marić, M. and Ivković, A. and Ivković, Branka and Janošević-Ležaić, Aleksandra and Uskoković-Marković, Snežana and Savić, J. and Milojević-Rakić, M. and Bajuk-Bogdanović, D.",
year = "2023",
abstract = "ABSTRACT – Organic dyes from industry wastewater pollute water tables. Here proposed environmental 
solution relies on pristine red soil for oxidative degradation of methylene blue dye. Soil analysis comprised 
spectroscopic (FTIR and Raman) and microscopic (SEM/EDS) techniques, while spectrophotometry was 
applied for dye quantification. The dominant soil mineral is kaolinite, while Fe homogeneous distribution 
is witnessed in the γ-FeO(OH) form. Soil/Fenton reagent achieved substantial 93% dye removal. An optimal 
oxidant concentration in the Fenton system is 10 mM. We confirm the excellent performance of pristine 
red soil samples as naturally occurring adsorbents and catalysts in Fenton oxidation of environmental 
pollutants.",
publisher = "University of Belgrade, Technical Faculty in Bor",
journal = "XV International Mineral Processing and Recycling Conference, 17-19 May 2023, Belgrade, Serbia",
title = "Removal of methylene blue from aqueous solutions using an iron-rich soil",
url = "https://hdl.handle.net/21.15107/rcub_farfar_5448"
}

Marić, M., Ivković, A., Ivković, B., Janošević-Ležaić, A., Uskoković-Marković, S., Savić, J., Milojević-Rakić, M.,& Bajuk-Bogdanović, D.. (2023). Removal of methylene blue from aqueous solutions using an iron-rich soil. in XV International Mineral Processing and Recycling Conference, 17-19 May 2023, Belgrade, Serbia
University of Belgrade..
https://hdl.handle.net/21.15107/rcub_farfar_5448

Marić M, Ivković A, Ivković B, Janošević-Ležaić A, Uskoković-Marković S, Savić J, Milojević-Rakić M, Bajuk-Bogdanović D. Removal of methylene blue from aqueous solutions using an iron-rich soil. in XV International Mineral Processing and Recycling Conference, 17-19 May 2023, Belgrade, Serbia. 2023;.
https://hdl.handle.net/21.15107/rcub_farfar_5448 .

Marić, M., Ivković, A., Ivković, Branka, Janošević-Ležaić, Aleksandra, Uskoković-Marković, Snežana, Savić, J., Milojević-Rakić, M., Bajuk-Bogdanović, D., "Removal of methylene blue from aqueous solutions using an iron-rich soil" in XV International Mineral Processing and Recycling Conference, 17-19 May 2023, Belgrade, Serbia (2023),
https://hdl.handle.net/21.15107/rcub_farfar_5448 .

TY  - JOUR
AU  - Jevremović, Anka
AU  - Savić, Marjetka
AU  - Janošević-Ležaić, Aleksandra
AU  - Krstić, Jugoslav
AU  - Gavrilov, Nemanja
AU  - Bajuk-Bogdanović, Danica
AU  - Milojević-Rakić, Maja
AU  - Ćirić-Marjanović, Gordana
PY  - 2023
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5342
AB  - The environmental application of the carbonized composites of the Zn-containing metal-organic framework MOF-5 and polyaniline (PANI) in its emeraldine salt and base forms (C-(MOF-5/PANI)) was investigated for the first time. Textural properties and particle size distributions revealed that composites are dominantly mesoporous and nanoscale in nature, while Raman spectroscopy revealed the ZnO phase beneath the carbon matrix. Adsorption of pesticide, dye, and metal cation on C-(MOF-5/PANI) composites in aqueous solutions was evaluated and compared with the behavior of the precursor components, carbonized MOF-5 (cMOF), and carbonized PANIs. A lower MOF-5 content in the precursor, a higher specific surface area, and the pore volume of the composites led to improved adsorption performance for acetamiprid (124 mg/g) and Methylene Blue (135 mg/g). The presence of O/N functional groups in composites is essential for the adsorption of nitrogen-rich pollutants through hydrogen bonding with an estimated monolayer capacity twice as high as that of cMOF. The proton exchange accompanying Cd2+ retention was associated with the Zn/Cd ion exchange, and the highest capacity (9.8 mg/g) was observed for the composite synthesized from the precursor with a high MOF-5 content. The multifunctionality of composites was evidenced in mixtures of pollutants where noticeably better performance for Cd2+ removal was found for the composite compared to cMOF. Competitive binding between three pollutants favored the adsorption of pesticide and dye, thereby hindering to some extent the ion exchange necessary for the removal of metal cations. The results emphasize the importance of the PANI form and MOF-5/PANI weight ratio in precursors for the development of surface, porosity, and active sites in C-(MOF-5/PANI) composites, thus guiding their environmental efficiency. The study also demonstrated that C-(MOF-5/PANI) composites retained studied pollutants much better than carbonized precursor PANIs and showed comparable or better adsorption ability than cMOF.
PB  - MDPI
T2  - Polymers
T1  - Environmental Potential of Carbonized MOF-5/PANI Composites for Pesticide, Dye, and Metal Cations—Can They Actually Retain Them All?
VL  - 15
IS  - 22
DO  - 10.3390/polym15224349
ER  - 

@article{
author = "Jevremović, Anka and Savić, Marjetka and Janošević-Ležaić, Aleksandra and Krstić, Jugoslav and Gavrilov, Nemanja and Bajuk-Bogdanović, Danica and Milojević-Rakić, Maja and Ćirić-Marjanović, Gordana",
year = "2023",
abstract = "The environmental application of the carbonized composites of the Zn-containing metal-organic framework MOF-5 and polyaniline (PANI) in its emeraldine salt and base forms (C-(MOF-5/PANI)) was investigated for the first time. Textural properties and particle size distributions revealed that composites are dominantly mesoporous and nanoscale in nature, while Raman spectroscopy revealed the ZnO phase beneath the carbon matrix. Adsorption of pesticide, dye, and metal cation on C-(MOF-5/PANI) composites in aqueous solutions was evaluated and compared with the behavior of the precursor components, carbonized MOF-5 (cMOF), and carbonized PANIs. A lower MOF-5 content in the precursor, a higher specific surface area, and the pore volume of the composites led to improved adsorption performance for acetamiprid (124 mg/g) and Methylene Blue (135 mg/g). The presence of O/N functional groups in composites is essential for the adsorption of nitrogen-rich pollutants through hydrogen bonding with an estimated monolayer capacity twice as high as that of cMOF. The proton exchange accompanying Cd2+ retention was associated with the Zn/Cd ion exchange, and the highest capacity (9.8 mg/g) was observed for the composite synthesized from the precursor with a high MOF-5 content. The multifunctionality of composites was evidenced in mixtures of pollutants where noticeably better performance for Cd2+ removal was found for the composite compared to cMOF. Competitive binding between three pollutants favored the adsorption of pesticide and dye, thereby hindering to some extent the ion exchange necessary for the removal of metal cations. The results emphasize the importance of the PANI form and MOF-5/PANI weight ratio in precursors for the development of surface, porosity, and active sites in C-(MOF-5/PANI) composites, thus guiding their environmental efficiency. The study also demonstrated that C-(MOF-5/PANI) composites retained studied pollutants much better than carbonized precursor PANIs and showed comparable or better adsorption ability than cMOF.",
publisher = "MDPI",
journal = "Polymers",
title = "Environmental Potential of Carbonized MOF-5/PANI Composites for Pesticide, Dye, and Metal Cations—Can They Actually Retain Them All?",
volume = "15",
number = "22",
doi = "10.3390/polym15224349"
}

Jevremović, A., Savić, M., Janošević-Ležaić, A., Krstić, J., Gavrilov, N., Bajuk-Bogdanović, D., Milojević-Rakić, M.,& Ćirić-Marjanović, G.. (2023). Environmental Potential of Carbonized MOF-5/PANI Composites for Pesticide, Dye, and Metal Cations—Can They Actually Retain Them All?. in Polymers
MDPI., 15(22).
https://doi.org/10.3390/polym15224349

Jevremović A, Savić M, Janošević-Ležaić A, Krstić J, Gavrilov N, Bajuk-Bogdanović D, Milojević-Rakić M, Ćirić-Marjanović G. Environmental Potential of Carbonized MOF-5/PANI Composites for Pesticide, Dye, and Metal Cations—Can They Actually Retain Them All?. in Polymers. 2023;15(22).
doi:10.3390/polym15224349 .

Jevremović, Anka, Savić, Marjetka, Janošević-Ležaić, Aleksandra, Krstić, Jugoslav, Gavrilov, Nemanja, Bajuk-Bogdanović, Danica, Milojević-Rakić, Maja, Ćirić-Marjanović, Gordana, "Environmental Potential of Carbonized MOF-5/PANI Composites for Pesticide, Dye, and Metal Cations—Can They Actually Retain Them All?" in Polymers, 15, no. 22 (2023),
https://doi.org/10.3390/polym15224349 . .

TY  - JOUR
AU  - Rupar, Jelena
AU  - Hrnjić, Armin
AU  - Uskoković-Marković, Snežana
AU  - Bajuk-Bogdanović, Danica
AU  - Milojević-Rakić, Maja
AU  - Gavrilov, Nemanja
AU  - Janošević-Ležaić, Aleksandra
PY  - 2023
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4989
AB  - Electrochemical crosslinking of alginate strands by in situ iron oxidation was explored using a potentiostatic regime. Carbon-based materials co-doped with iron, nitrogen, and/or sulfur were prepared via electrolyte composition variation with a nitrogen-rich compound (rivanol) or through post-treatments with sodium sulfide. Nanometer-sized iron particles were confirmed by transmission and field emission scanning electron microscopy in all samples as a consequence of the homogeneous dispersion of iron in the alginate scaffold and its concomitant growth-limiting effect of alginate chains. Raman spectra confirmed a rise in structural disorder with rivanol/Na2S treatment, which points to more defect sites and edges known to be active sites for oxygen reduction. Fourier transform infrared (FTIR) spectra confirmed the presence of different iron, nitrogen, and sulfur species, with a marked difference between Na2S treated/untreated samples. The most positive onset potential (−0.26 V vs. saturated calomel electrode, SCE) was evidenced for the sample co-doped with N, S, and Fe, surpassing the activity of those with single and/or double doping. The mechanism of oxygen reduction in 0.1 M KOH was dominated by the 2e− reduction pathway at low overpotentials and shifted towards complete 4e− reduction at the most negative explored values. The presented results put forward electrochemically formed alginate gels functionalized by homogeneously dispersed multivalent cations as an excellent starting point in nanomaterial design and engineering.
PB  - MDPI
T2  - Polymers
T1  - Electrochemical Crosslinking of Alginate—Towards Doped Carbons for Oxygen Reduction
VL  - 15
IS  - 15
DO  - 10.3390/polym15153169
ER  - 

@article{
author = "Rupar, Jelena and Hrnjić, Armin and Uskoković-Marković, Snežana and Bajuk-Bogdanović, Danica and Milojević-Rakić, Maja and Gavrilov, Nemanja and Janošević-Ležaić, Aleksandra",
year = "2023",
abstract = "Electrochemical crosslinking of alginate strands by in situ iron oxidation was explored using a potentiostatic regime. Carbon-based materials co-doped with iron, nitrogen, and/or sulfur were prepared via electrolyte composition variation with a nitrogen-rich compound (rivanol) or through post-treatments with sodium sulfide. Nanometer-sized iron particles were confirmed by transmission and field emission scanning electron microscopy in all samples as a consequence of the homogeneous dispersion of iron in the alginate scaffold and its concomitant growth-limiting effect of alginate chains. Raman spectra confirmed a rise in structural disorder with rivanol/Na2S treatment, which points to more defect sites and edges known to be active sites for oxygen reduction. Fourier transform infrared (FTIR) spectra confirmed the presence of different iron, nitrogen, and sulfur species, with a marked difference between Na2S treated/untreated samples. The most positive onset potential (−0.26 V vs. saturated calomel electrode, SCE) was evidenced for the sample co-doped with N, S, and Fe, surpassing the activity of those with single and/or double doping. The mechanism of oxygen reduction in 0.1 M KOH was dominated by the 2e− reduction pathway at low overpotentials and shifted towards complete 4e− reduction at the most negative explored values. The presented results put forward electrochemically formed alginate gels functionalized by homogeneously dispersed multivalent cations as an excellent starting point in nanomaterial design and engineering.",
publisher = "MDPI",
journal = "Polymers",
title = "Electrochemical Crosslinking of Alginate—Towards Doped Carbons for Oxygen Reduction",
volume = "15",
number = "15",
doi = "10.3390/polym15153169"
}

Rupar, J., Hrnjić, A., Uskoković-Marković, S., Bajuk-Bogdanović, D., Milojević-Rakić, M., Gavrilov, N.,& Janošević-Ležaić, A.. (2023). Electrochemical Crosslinking of Alginate—Towards Doped Carbons for Oxygen Reduction. in Polymers
MDPI., 15(15).
https://doi.org/10.3390/polym15153169

Rupar J, Hrnjić A, Uskoković-Marković S, Bajuk-Bogdanović D, Milojević-Rakić M, Gavrilov N, Janošević-Ležaić A. Electrochemical Crosslinking of Alginate—Towards Doped Carbons for Oxygen Reduction. in Polymers. 2023;15(15).
doi:10.3390/polym15153169 .

Rupar, Jelena, Hrnjić, Armin, Uskoković-Marković, Snežana, Bajuk-Bogdanović, Danica, Milojević-Rakić, Maja, Gavrilov, Nemanja, Janošević-Ležaić, Aleksandra, "Electrochemical Crosslinking of Alginate—Towards Doped Carbons for Oxygen Reduction" in Polymers, 15, no. 15 (2023),
https://doi.org/10.3390/polym15153169 . .

TY  - JOUR
AU  - Popadić, Daliborka
AU  - Gavrilov, Nemanja
AU  - Krstić, Jugoslav
AU  - Nedić Vasiljević, Bojana
AU  - Janošević-Ležaić, Aleksandra
AU  - Uskoković-Marković, Snežana
AU  - Milojević-Rakić, Maja
AU  - Bajuk-Bogdanović, Danica
PY  - 2023
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4882
AB  - Herein we unequivocally identify the mechanism of zeolite-catalysed thermal degradation of pesticide, employing Fourier-transform infrared spectroscopy (FTIR), Raman and mass spectrometry following temperature decomposition (TPDe/MS). We demonstrate that Y zeolite can effectively adsorb a significant amount of acetamiprid both in a single trial (168 mg/g) and in 10 cycles (1249 mg/g) with intermittent thermal regeneration at 300 °C. Sectional vibrational analysis of acetamiprid two-stage thermal degradation is performed for pristine and supported pesticide. The acetamiprid Raman spectral changes appear at 200 °C, while partial carbonization occurs at 250 °C. The gradual disappearance of the FTIR bands of acetamiprid is seen up to 270 °C when two Raman signature bands for carbonised material emerged. The TPDe/MS profiles reveal the evolution of mass fragments - in the first step, cleavage of the C[sbnd]C bond occurs between the aromatic core of the molecule and its tail-end, followed by cleavage of the C[sbnd]N bond. The mechanism of adsorbed acetamiprid degradation follows the same step, at significantly lower temperatures, as the process is catalysed by the interaction of acetamiprid nitrogens and zeolite support. Reduced temperature degradation allows for a quick recovery process that leaves 65% efficacy after 10 cycles. After numerous cycles of recovery, a subsequent one-time heat treatment at 700 °C completely restores initial efficacy. The efficient adsorption, novel details on degradation mechanism and ease of regeneration procedure place the Y zeolite at the forefront of future all-encompassing environmental solutions.
PB  - Elsevier B.V.
T2  - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
T1  - Spectral evidence of acetamiprid's thermal degradation products and mechanism
VL  - 301
IS  - 15
DO  - 10.1016/j.saa.2023.122987
ER  - 

@article{
author = "Popadić, Daliborka and Gavrilov, Nemanja and Krstić, Jugoslav and Nedić Vasiljević, Bojana and Janošević-Ležaić, Aleksandra and Uskoković-Marković, Snežana and Milojević-Rakić, Maja and Bajuk-Bogdanović, Danica",
year = "2023",
abstract = "Herein we unequivocally identify the mechanism of zeolite-catalysed thermal degradation of pesticide, employing Fourier-transform infrared spectroscopy (FTIR), Raman and mass spectrometry following temperature decomposition (TPDe/MS). We demonstrate that Y zeolite can effectively adsorb a significant amount of acetamiprid both in a single trial (168 mg/g) and in 10 cycles (1249 mg/g) with intermittent thermal regeneration at 300 °C. Sectional vibrational analysis of acetamiprid two-stage thermal degradation is performed for pristine and supported pesticide. The acetamiprid Raman spectral changes appear at 200 °C, while partial carbonization occurs at 250 °C. The gradual disappearance of the FTIR bands of acetamiprid is seen up to 270 °C when two Raman signature bands for carbonised material emerged. The TPDe/MS profiles reveal the evolution of mass fragments - in the first step, cleavage of the C[sbnd]C bond occurs between the aromatic core of the molecule and its tail-end, followed by cleavage of the C[sbnd]N bond. The mechanism of adsorbed acetamiprid degradation follows the same step, at significantly lower temperatures, as the process is catalysed by the interaction of acetamiprid nitrogens and zeolite support. Reduced temperature degradation allows for a quick recovery process that leaves 65% efficacy after 10 cycles. After numerous cycles of recovery, a subsequent one-time heat treatment at 700 °C completely restores initial efficacy. The efficient adsorption, novel details on degradation mechanism and ease of regeneration procedure place the Y zeolite at the forefront of future all-encompassing environmental solutions.",
publisher = "Elsevier B.V.",
journal = "Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy",
title = "Spectral evidence of acetamiprid's thermal degradation products and mechanism",
volume = "301",
number = "15",
doi = "10.1016/j.saa.2023.122987"
}

Popadić, D., Gavrilov, N., Krstić, J., Nedić Vasiljević, B., Janošević-Ležaić, A., Uskoković-Marković, S., Milojević-Rakić, M.,& Bajuk-Bogdanović, D.. (2023). Spectral evidence of acetamiprid's thermal degradation products and mechanism. in Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Elsevier B.V.., 301(15).
https://doi.org/10.1016/j.saa.2023.122987

Popadić D, Gavrilov N, Krstić J, Nedić Vasiljević B, Janošević-Ležaić A, Uskoković-Marković S, Milojević-Rakić M, Bajuk-Bogdanović D. Spectral evidence of acetamiprid's thermal degradation products and mechanism. in Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy. 2023;301(15).
doi:10.1016/j.saa.2023.122987 .

Popadić, Daliborka, Gavrilov, Nemanja, Krstić, Jugoslav, Nedić Vasiljević, Bojana, Janošević-Ležaić, Aleksandra, Uskoković-Marković, Snežana, Milojević-Rakić, Maja, Bajuk-Bogdanović, Danica, "Spectral evidence of acetamiprid's thermal degradation products and mechanism" in Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 301, no. 15 (2023),
https://doi.org/10.1016/j.saa.2023.122987 . .

TY  - JOUR
AU  - Rupar, Jelena
AU  - Tekić, Danijela
AU  - Janošević-Ležaić, Aleksandra
AU  - Upadhyay, Kush K.
PY  - 2023
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4419
AB  - Due to the limited reaction rate of the oxygen reduction reaction (ORR), it is considered as a limiting factor in the performance of fuel cells and metal-air batteries. Platinum is considered the benchmark catalyst for ORR; however, the scarcity of platinum, its high price, the drift phenomenon, its insufficient durability, and its susceptibility to gas poisoning are the reasons for the constant search for new ORR catalysts. Carbon-based catalysts show exceptional promise in this respect considering economic profitability and activity, and, in addition, they have favorable conductivity and often a large specific surface area. The use of chitin, cellulose, lignin, coconut shell particles, shrimp shells, and even hair for this purpose was reported, as they had similar electrochemical activity regarding Pt. Alginate, a natural polymer and a constituent of brown algae, can be successfully used to obtain carbon materials that catalyze ORR. In addition, metal atomic-level catalysts and metal N-doped porous carbon materials, obtained from sodium alginate as a precursor, have been proposed as efficient electrocatalysts for ORR. Except for alginate, other biopolymers have been reported to play an important role in the preparation of ORR catalysts. In this review, recent advances regarding biopolymer-derived ORR catalysts are summarized, with a focus on alginate as a source.
PB  - MDPI
T2  - Catalysts
T1  - ORR Catalysts Derived from Biopolymers
VL  - 13
IS  - 1
DO  - 10.3390/catal13010080
ER  - 

@article{
author = "Rupar, Jelena and Tekić, Danijela and Janošević-Ležaić, Aleksandra and Upadhyay, Kush K.",
year = "2023",
abstract = "Due to the limited reaction rate of the oxygen reduction reaction (ORR), it is considered as a limiting factor in the performance of fuel cells and metal-air batteries. Platinum is considered the benchmark catalyst for ORR; however, the scarcity of platinum, its high price, the drift phenomenon, its insufficient durability, and its susceptibility to gas poisoning are the reasons for the constant search for new ORR catalysts. Carbon-based catalysts show exceptional promise in this respect considering economic profitability and activity, and, in addition, they have favorable conductivity and often a large specific surface area. The use of chitin, cellulose, lignin, coconut shell particles, shrimp shells, and even hair for this purpose was reported, as they had similar electrochemical activity regarding Pt. Alginate, a natural polymer and a constituent of brown algae, can be successfully used to obtain carbon materials that catalyze ORR. In addition, metal atomic-level catalysts and metal N-doped porous carbon materials, obtained from sodium alginate as a precursor, have been proposed as efficient electrocatalysts for ORR. Except for alginate, other biopolymers have been reported to play an important role in the preparation of ORR catalysts. In this review, recent advances regarding biopolymer-derived ORR catalysts are summarized, with a focus on alginate as a source.",
publisher = "MDPI",
journal = "Catalysts",
title = "ORR Catalysts Derived from Biopolymers",
volume = "13",
number = "1",
doi = "10.3390/catal13010080"
}

Rupar, J., Tekić, D., Janošević-Ležaić, A.,& Upadhyay, K. K.. (2023). ORR Catalysts Derived from Biopolymers. in Catalysts
MDPI., 13(1).
https://doi.org/10.3390/catal13010080

Rupar J, Tekić D, Janošević-Ležaić A, Upadhyay KK. ORR Catalysts Derived from Biopolymers. in Catalysts. 2023;13(1).
doi:10.3390/catal13010080 .

Rupar, Jelena, Tekić, Danijela, Janošević-Ležaić, Aleksandra, Upadhyay, Kush K., "ORR Catalysts Derived from Biopolymers" in Catalysts, 13, no. 1 (2023),
https://doi.org/10.3390/catal13010080 . .

TY  - JOUR
AU  - Negrojević, Luka
AU  - Lončar, Aleksandar
AU  - Maksimović, Jelena
AU  - Anić, Slobodan
AU  - Čupić, Željko
AU  - Kolar-Anić, Ljiljana
AU  - Pejić, Nataša
PY  - 2022
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4022
AB  - A kinetic method for the determination of l-tyrosine (Tyr) by analyte pulse perturbation, caused by different amounts of Tyr, in the Bray–Liebhafsky (BL) oscillatory reaction realized in a continuous-flow stirred tank reactor, is proposed. For such purposes, the BL oscillating reaction was kept in a stable non-equilibrium stationary state close to the bifurcation point and was used as the matrix reaction system. Under optimum reaction conditions, the linear relationship between the kinetic parameters, Δτ2 (the period between first two oscillations that appear after applied perturbation) as well as τend (the time elapsed between the perturbation of the BL reaction by Tyr and the termination of the oscillatory phase) and the Tyr concentrations is obtained over the ranges 1.1 × 10− 6 − 9.2 × 10− 6 mol L− 1 and 1.1 × 10− 6 − 1.4 × 10− 5 mol L− 1, with the limit of detections of 6.6 × 10− 7 mol L− 1 and 6.4 × 10− 7 mol L− 1. The described method that relies on a simple instrumental set-up, has been successfully applied to the determination of Tyr in a dietary supplement. Some aspects of the possible mechanism of Tyr action on the BL oscillator are discussed.
PB  - Springer Science and Business Media B.V.
T2  - Reaction Kinetics, Mechanisms and Catalysis
T1  - Bray–Liebhafsky oscillatory reaction in a continuous-flow stirred tank reactor as the matrix system for determination of tyrosine
DO  - 10.1007/s11144-021-02130-5
ER  - 

@article{
author = "Negrojević, Luka and Lončar, Aleksandar and Maksimović, Jelena and Anić, Slobodan and Čupić, Željko and Kolar-Anić, Ljiljana and Pejić, Nataša",
year = "2022",
abstract = "A kinetic method for the determination of l-tyrosine (Tyr) by analyte pulse perturbation, caused by different amounts of Tyr, in the Bray–Liebhafsky (BL) oscillatory reaction realized in a continuous-flow stirred tank reactor, is proposed. For such purposes, the BL oscillating reaction was kept in a stable non-equilibrium stationary state close to the bifurcation point and was used as the matrix reaction system. Under optimum reaction conditions, the linear relationship between the kinetic parameters, Δτ2 (the period between first two oscillations that appear after applied perturbation) as well as τend (the time elapsed between the perturbation of the BL reaction by Tyr and the termination of the oscillatory phase) and the Tyr concentrations is obtained over the ranges 1.1 × 10− 6 − 9.2 × 10− 6 mol L− 1 and 1.1 × 10− 6 − 1.4 × 10− 5 mol L− 1, with the limit of detections of 6.6 × 10− 7 mol L− 1 and 6.4 × 10− 7 mol L− 1. The described method that relies on a simple instrumental set-up, has been successfully applied to the determination of Tyr in a dietary supplement. Some aspects of the possible mechanism of Tyr action on the BL oscillator are discussed.",
publisher = "Springer Science and Business Media B.V.",
journal = "Reaction Kinetics, Mechanisms and Catalysis",
title = "Bray–Liebhafsky oscillatory reaction in a continuous-flow stirred tank reactor as the matrix system for determination of tyrosine",
doi = "10.1007/s11144-021-02130-5"
}

Negrojević, L., Lončar, A., Maksimović, J., Anić, S., Čupić, Ž., Kolar-Anić, L.,& Pejić, N.. (2022). Bray–Liebhafsky oscillatory reaction in a continuous-flow stirred tank reactor as the matrix system for determination of tyrosine. in Reaction Kinetics, Mechanisms and Catalysis
Springer Science and Business Media B.V...
https://doi.org/10.1007/s11144-021-02130-5

Negrojević L, Lončar A, Maksimović J, Anić S, Čupić Ž, Kolar-Anić L, Pejić N. Bray–Liebhafsky oscillatory reaction in a continuous-flow stirred tank reactor as the matrix system for determination of tyrosine. in Reaction Kinetics, Mechanisms and Catalysis. 2022;.
doi:10.1007/s11144-021-02130-5 .

Negrojević, Luka, Lončar, Aleksandar, Maksimović, Jelena, Anić, Slobodan, Čupić, Željko, Kolar-Anić, Ljiljana, Pejić, Nataša, "Bray–Liebhafsky oscillatory reaction in a continuous-flow stirred tank reactor as the matrix system for determination of tyrosine" in Reaction Kinetics, Mechanisms and Catalysis (2022),
https://doi.org/10.1007/s11144-021-02130-5 . .

TY  - JOUR
AU  - Gledović, Ana
AU  - Bajuk-Bogdanović, Danica
AU  - Uskoković-Marković, Snežana
AU  - Pavun, Leposava
AU  - Savić, Snežana
AU  - Janošević-Ležaić, Aleksandra
PY  - 2022
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4170
AB  - In this study several essential oils (EOs): basil - BA, lemon balm - LB and oregano - OR were incorporated into nanoemulsions (NEs) as prospective carriers for natural and sensitive bioactives. NEs were prepared via the phase inversion composition (PIC) method, which is an energy-efficient cold process. Physicochemical stability of NEs was confirmed by particle size distribution analysis, electrical conductivity and pH value measurements, as well as by optical microscopy observations. The type of EO and the surfactant and oil mix concentration were found to be crucial factors governing the NE properties and stability. Raman spectra of the EOs confirmed main active ingredients and provided detection of interactions with the nanocarrier, which is a novel application of this technique. The antioxidant activity towards DPPH radical in methanol was concentration-dependent with a similar trend for individual oils and oil-loaded NEs (OR> LB> BA). However, the ABTS test in an aqueous medium revealed notable change in the order of activity after EO nanonisation at higher EO concentrations. Overall, it was found that OR-NE was the most effective and stable system, since OR acted as a co-stabiliser in the NE formulation, and its remarkably high antioxidant activity was successfully preserved during 6 months of storage.
AB  - U ovoj studiji nekoliko različitih etarskih ulja (EU): bosiljak – BO, matičnjak – MA i origano – OR inkor-
porirano je u nanoemulzije (NE) kao potencijalne nosače za prirodne i osetljive bioaktivne sastojke. NE
su pripremljene pomoću metode inverzije faza (engl. phase inversion composition – PIC method) koja
predstavlja niskoenergetski i ekonomičan postupak izrade. Fizičkohemijska stabilnost nanoemulzija
potvrđena je analizom raspodele veličina kapi, merenjem električne provodljivosti i pH vrednosti, kao i
optičkom mikroskopijom. Nađeno je da su vrsta EU i koncentracija smeše surfaktanata i uljane faze dva
ključna faktora koja su uticala na karakteristike i stabilnost dobijenih emulzija. Tehnikom Ramanske
spektroskopije potvrđeni su glavni aktivni sastojci etarskih ulja i detektovane su moguće interakcije sa
nanonosačem, što predstavlja noviju primenu pomenute tehnike. Pokazano je da antioksidantna
aktivnost prema DPPH radikalu u metanolu zavisi od koncentracije, sa sličnim trendom za čista etarska
ulja i za nanoemulzije sa uljima (OR> MA> BO). Međutim, ABTS test u vodenoj sredini pokazao je izrazite
promene u redosledu aktivnosti sa povećanjem koncentracije EU i nakon nanonizacije EU. Generalno,
dokazano je da je OR-NE najefikasniji i najstabiliniji sistem, s obzirom da je ulje origana ispoljilo ulogu
kostabilizatora u formulaciji, uz istovremeno očuvanje njegove veoma visoke antioksidantne aktivnosti
u obliku nanoemulzije, tokom 6 meseci čuvanja.
PB  - Association of the Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Low energy nanoemulsions as carriers for essential oils in topical formulations for antioxidant skin protection
T1  - Niskoenergetske nanoemulzije kao nosači za etarska ulja u topikalnim formulacijama za antioksidantnu zaštitu kože
VL  - 76
IS  - 1
SP  - 29
EP  - 42
DO  - 10.2298/HEMIND210509004G
ER  - 

@article{
author = "Gledović, Ana and Bajuk-Bogdanović, Danica and Uskoković-Marković, Snežana and Pavun, Leposava and Savić, Snežana and Janošević-Ležaić, Aleksandra",
year = "2022",
abstract = "In this study several essential oils (EOs): basil - BA, lemon balm - LB and oregano - OR were incorporated into nanoemulsions (NEs) as prospective carriers for natural and sensitive bioactives. NEs were prepared via the phase inversion composition (PIC) method, which is an energy-efficient cold process. Physicochemical stability of NEs was confirmed by particle size distribution analysis, electrical conductivity and pH value measurements, as well as by optical microscopy observations. The type of EO and the surfactant and oil mix concentration were found to be crucial factors governing the NE properties and stability. Raman spectra of the EOs confirmed main active ingredients and provided detection of interactions with the nanocarrier, which is a novel application of this technique. The antioxidant activity towards DPPH radical in methanol was concentration-dependent with a similar trend for individual oils and oil-loaded NEs (OR> LB> BA). However, the ABTS test in an aqueous medium revealed notable change in the order of activity after EO nanonisation at higher EO concentrations. Overall, it was found that OR-NE was the most effective and stable system, since OR acted as a co-stabiliser in the NE formulation, and its remarkably high antioxidant activity was successfully preserved during 6 months of storage., U ovoj studiji nekoliko različitih etarskih ulja (EU): bosiljak – BO, matičnjak – MA i origano – OR inkor-
porirano je u nanoemulzije (NE) kao potencijalne nosače za prirodne i osetljive bioaktivne sastojke. NE
su pripremljene pomoću metode inverzije faza (engl. phase inversion composition – PIC method) koja
predstavlja niskoenergetski i ekonomičan postupak izrade. Fizičkohemijska stabilnost nanoemulzija
potvrđena je analizom raspodele veličina kapi, merenjem električne provodljivosti i pH vrednosti, kao i
optičkom mikroskopijom. Nađeno je da su vrsta EU i koncentracija smeše surfaktanata i uljane faze dva
ključna faktora koja su uticala na karakteristike i stabilnost dobijenih emulzija. Tehnikom Ramanske
spektroskopije potvrđeni su glavni aktivni sastojci etarskih ulja i detektovane su moguće interakcije sa
nanonosačem, što predstavlja noviju primenu pomenute tehnike. Pokazano je da antioksidantna
aktivnost prema DPPH radikalu u metanolu zavisi od koncentracije, sa sličnim trendom za čista etarska
ulja i za nanoemulzije sa uljima (OR> MA> BO). Međutim, ABTS test u vodenoj sredini pokazao je izrazite
promene u redosledu aktivnosti sa povećanjem koncentracije EU i nakon nanonizacije EU. Generalno,
dokazano je da je OR-NE najefikasniji i najstabiliniji sistem, s obzirom da je ulje origana ispoljilo ulogu
kostabilizatora u formulaciji, uz istovremeno očuvanje njegove veoma visoke antioksidantne aktivnosti
u obliku nanoemulzije, tokom 6 meseci čuvanja.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Low energy nanoemulsions as carriers for essential oils in topical formulations for antioxidant skin protection, Niskoenergetske nanoemulzije kao nosači za etarska ulja u topikalnim formulacijama za antioksidantnu zaštitu kože",
volume = "76",
number = "1",
pages = "29-42",
doi = "10.2298/HEMIND210509004G"
}

Gledović, A., Bajuk-Bogdanović, D., Uskoković-Marković, S., Pavun, L., Savić, S.,& Janošević-Ležaić, A.. (2022). Low energy nanoemulsions as carriers for essential oils in topical formulations for antioxidant skin protection. in Hemijska industrija
Association of the Chemical Engineers of Serbia., 76(1), 29-42.
https://doi.org/10.2298/HEMIND210509004G

Gledović A, Bajuk-Bogdanović D, Uskoković-Marković S, Pavun L, Savić S, Janošević-Ležaić A. Low energy nanoemulsions as carriers for essential oils in topical formulations for antioxidant skin protection. in Hemijska industrija. 2022;76(1):29-42.
doi:10.2298/HEMIND210509004G .

Gledović, Ana, Bajuk-Bogdanović, Danica, Uskoković-Marković, Snežana, Pavun, Leposava, Savić, Snežana, Janošević-Ležaić, Aleksandra, "Low energy nanoemulsions as carriers for essential oils in topical formulations for antioxidant skin protection" in Hemijska industrija, 76, no. 1 (2022):29-42,
https://doi.org/10.2298/HEMIND210509004G . .

TY  - JOUR
AU  - Janošević-Ležaić, Aleksandra
AU  - Bajuk-Bogdanović, Danica
AU  - Krstić, Jugoslav
AU  - Jovanović, Zoran
AU  - Mravik, Željko
AU  - Kovač, Janez
AU  - Gavrilov, Nemanja
PY  - 2022
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4070
AB  - Transformation of tannic acid (TA), a cheap, abundant and environmentally friendly (by)product, upon carbonization at various temperatures was examined as it is extensively being used in energy storing devices. In addition of reviling what is happening with TA upon carbonization, a step further has been taken to scrutinize the role of carbonized TA (CTA) playing in energy storage composites. Increasing the carbonization temperature from 500 ◦C to 800 ◦C led to a nine orders of magnitude increase in conductivity, from 9⋅10–9 S cm
PB  - Elsevier Ltd
T2  - Fuel
T1  - What role does carbonized tannic acid play in energy storage composites?
VL  - 312
DO  - 10.1016/j.fuel.2021.122930
ER  - 

@article{
author = "Janošević-Ležaić, Aleksandra and Bajuk-Bogdanović, Danica and Krstić, Jugoslav and Jovanović, Zoran and Mravik, Željko and Kovač, Janez and Gavrilov, Nemanja",
year = "2022",
abstract = "Transformation of tannic acid (TA), a cheap, abundant and environmentally friendly (by)product, upon carbonization at various temperatures was examined as it is extensively being used in energy storing devices. In addition of reviling what is happening with TA upon carbonization, a step further has been taken to scrutinize the role of carbonized TA (CTA) playing in energy storage composites. Increasing the carbonization temperature from 500 ◦C to 800 ◦C led to a nine orders of magnitude increase in conductivity, from 9⋅10–9 S cm",
publisher = "Elsevier Ltd",
journal = "Fuel",
title = "What role does carbonized tannic acid play in energy storage composites?",
volume = "312",
doi = "10.1016/j.fuel.2021.122930"
}

Janošević-Ležaić, A., Bajuk-Bogdanović, D., Krstić, J., Jovanović, Z., Mravik, Ž., Kovač, J.,& Gavrilov, N.. (2022). What role does carbonized tannic acid play in energy storage composites?. in Fuel
Elsevier Ltd., 312.
https://doi.org/10.1016/j.fuel.2021.122930

Janošević-Ležaić A, Bajuk-Bogdanović D, Krstić J, Jovanović Z, Mravik Ž, Kovač J, Gavrilov N. What role does carbonized tannic acid play in energy storage composites?. in Fuel. 2022;312.
doi:10.1016/j.fuel.2021.122930 .

Janošević-Ležaić, Aleksandra, Bajuk-Bogdanović, Danica, Krstić, Jugoslav, Jovanović, Zoran, Mravik, Željko, Kovač, Janez, Gavrilov, Nemanja, "What role does carbonized tannic acid play in energy storage composites?" in Fuel, 312 (2022),
https://doi.org/10.1016/j.fuel.2021.122930 . .

TY  - JOUR
AU  - Rupar, Jelena
AU  - Bajuk-Bogdanović, Danica
AU  - Milojević-Rakić, Maja
AU  - Krstić, Jugoslav
AU  - Upadhyay, Kush
AU  - Gavrilov, Nemanja
AU  - Janošević-Ležaić, Aleksandra
PY  - 2022
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4069
AB  - Here, we propose a novel, electrochemical preparation of in situ N-doped alginate-based carbon precursors with monodispersed zinc ions. Obtained carbons were evaluated by spectroscopic (FTIR, Raman and XPS), textural (N2 physisorption), microscopic (TEM) and elemental (SEM-EDS) descriptors to establish their distinctive fea- tures originating from different synthetic procedures. Carbons characteristics were assessed in view of several carbonization temperatures applied for their preparation from alginate precursors, and individual and joint effect of zinc and nitrogen on the precursor. Obtained Zn monodispersion, emphasizes the significance of electro- chemical preparation, allowing increasing temperature to induce changes from its ionic form to carbonate and oxide, while at 800 ◦C ZnO further reduces and evaporates. Since homogeneously dispersed Zn species acts as porosity evolving agent during carbonization, a substantial surface area is developed, in the range 718–1056 m2 g
PB  - Elsevier B.V.
T2  - Microporous and Mesoporous Materials
T1  - Tailored porosity development in carbons via Zn2+ monodispersion: Fitting supercapacitors
VL  - 335
DO  - 10.1016/j.micromeso.2022.111790
ER  - 

@article{
author = "Rupar, Jelena and Bajuk-Bogdanović, Danica and Milojević-Rakić, Maja and Krstić, Jugoslav and Upadhyay, Kush and Gavrilov, Nemanja and Janošević-Ležaić, Aleksandra",
year = "2022",
abstract = "Here, we propose a novel, electrochemical preparation of in situ N-doped alginate-based carbon precursors with monodispersed zinc ions. Obtained carbons were evaluated by spectroscopic (FTIR, Raman and XPS), textural (N2 physisorption), microscopic (TEM) and elemental (SEM-EDS) descriptors to establish their distinctive fea- tures originating from different synthetic procedures. Carbons characteristics were assessed in view of several carbonization temperatures applied for their preparation from alginate precursors, and individual and joint effect of zinc and nitrogen on the precursor. Obtained Zn monodispersion, emphasizes the significance of electro- chemical preparation, allowing increasing temperature to induce changes from its ionic form to carbonate and oxide, while at 800 ◦C ZnO further reduces and evaporates. Since homogeneously dispersed Zn species acts as porosity evolving agent during carbonization, a substantial surface area is developed, in the range 718–1056 m2 g",
publisher = "Elsevier B.V.",
journal = "Microporous and Mesoporous Materials",
title = "Tailored porosity development in carbons via Zn2+ monodispersion: Fitting supercapacitors",
volume = "335",
doi = "10.1016/j.micromeso.2022.111790"
}

Rupar, J., Bajuk-Bogdanović, D., Milojević-Rakić, M., Krstić, J., Upadhyay, K., Gavrilov, N.,& Janošević-Ležaić, A.. (2022). Tailored porosity development in carbons via Zn2+ monodispersion: Fitting supercapacitors. in Microporous and Mesoporous Materials
Elsevier B.V.., 335.
https://doi.org/10.1016/j.micromeso.2022.111790

Rupar J, Bajuk-Bogdanović D, Milojević-Rakić M, Krstić J, Upadhyay K, Gavrilov N, Janošević-Ležaić A. Tailored porosity development in carbons via Zn2+ monodispersion: Fitting supercapacitors. in Microporous and Mesoporous Materials. 2022;335.
doi:10.1016/j.micromeso.2022.111790 .

Rupar, Jelena, Bajuk-Bogdanović, Danica, Milojević-Rakić, Maja, Krstić, Jugoslav, Upadhyay, Kush, Gavrilov, Nemanja, Janošević-Ležaić, Aleksandra, "Tailored porosity development in carbons via Zn2+ monodispersion: Fitting supercapacitors" in Microporous and Mesoporous Materials, 335 (2022),
https://doi.org/10.1016/j.micromeso.2022.111790 . .

TY  - JOUR
AU  - Janošević-Ležaić, Aleksandra
AU  - Pašti, Igor
AU  - Gledović, Ana
AU  - Antić-Stanković, Jelena
AU  - Božić, Dragana
AU  - Uskoković-Marković, Snežana
AU  - Ćirić-Marjanović, Gordana
PY  - 2022
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4067
AB  - Novel electroactive PANI-GA micro/nanostructured functional copolymers/co-oligomers were synthesized by the oxidative copolymerization of aniline and gallic acid (GA) in an aqueous solution, using ammonium peroxydisulfate (APS) as an oxidant and different initial mole ratios of GA to aniline ([GA]/[aniline]=0.1, 0.25, 0.5 and 1.0). It was found that the yield, molecular structure, morphology, electrical conductivity, electrochemical behavior, antioxidant and antimicrobial properties of PANI-GA strongly depend on [GA]/[aniline] ratio. The highest conductivity (3.8 × 10–3 S cm􀀀 1) showed PANI-GA with dominant polyaniline (PANI) emeraldine salt segments and nanorod morphology, synthesized at [GA]/[aniline] = 0.1. FTIR spectroscopy confirmed the presence of covalently bonded GA and PANI-type structural segments in PANI-GA. The antioxidant activity of PANI-GA was explored by the spectrophotometric 2,2′ -azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) assay and electrochemical test for superoxide anion radical, •O2􀀀 . All protonated PANI-GA showed good scavenging activity toward ABTS•+ and •O2􀀀 radicals, whereby the highest activity exhibited PANI-GA produced at [GA]/[aniline] = 1. The radical scavenging activity of protonated PANI-GA samples toward ABTS•+ was much higher than that of PANI. The antimicrobial properties of the PANI-GA against bacteria S. aureus and E. coli, as well as against fungus C. albicans were evaluated. All synthesized protonated PANI-GA were more effective as S. aureus growth inhibitors than pristine GA and PANI. Highest effectiveness against E. coli and C. albicans, higher than that of pristine GA and PANI, showed conductive PANI-GA synthesized at [GA]/[aniline]= 0.1. Based on the obtained experimental results the mechanism of GA and aniline oxidative copolymerization is proposed.
PB  - Elsevier Ltd
T2  - Synthetic Metals
T1  - Copolymerization of aniline and gallic acid: Novel electroactive materials with antioxidant and antimicrobial activities
VL  - 286
DO  - 10.1016/j.synthmet.2022.117048
ER  - 

@article{
author = "Janošević-Ležaić, Aleksandra and Pašti, Igor and Gledović, Ana and Antić-Stanković, Jelena and Božić, Dragana and Uskoković-Marković, Snežana and Ćirić-Marjanović, Gordana",
year = "2022",
abstract = "Novel electroactive PANI-GA micro/nanostructured functional copolymers/co-oligomers were synthesized by the oxidative copolymerization of aniline and gallic acid (GA) in an aqueous solution, using ammonium peroxydisulfate (APS) as an oxidant and different initial mole ratios of GA to aniline ([GA]/[aniline]=0.1, 0.25, 0.5 and 1.0). It was found that the yield, molecular structure, morphology, electrical conductivity, electrochemical behavior, antioxidant and antimicrobial properties of PANI-GA strongly depend on [GA]/[aniline] ratio. The highest conductivity (3.8 × 10–3 S cm􀀀 1) showed PANI-GA with dominant polyaniline (PANI) emeraldine salt segments and nanorod morphology, synthesized at [GA]/[aniline] = 0.1. FTIR spectroscopy confirmed the presence of covalently bonded GA and PANI-type structural segments in PANI-GA. The antioxidant activity of PANI-GA was explored by the spectrophotometric 2,2′ -azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) assay and electrochemical test for superoxide anion radical, •O2􀀀 . All protonated PANI-GA showed good scavenging activity toward ABTS•+ and •O2􀀀 radicals, whereby the highest activity exhibited PANI-GA produced at [GA]/[aniline] = 1. The radical scavenging activity of protonated PANI-GA samples toward ABTS•+ was much higher than that of PANI. The antimicrobial properties of the PANI-GA against bacteria S. aureus and E. coli, as well as against fungus C. albicans were evaluated. All synthesized protonated PANI-GA were more effective as S. aureus growth inhibitors than pristine GA and PANI. Highest effectiveness against E. coli and C. albicans, higher than that of pristine GA and PANI, showed conductive PANI-GA synthesized at [GA]/[aniline]= 0.1. Based on the obtained experimental results the mechanism of GA and aniline oxidative copolymerization is proposed.",
publisher = "Elsevier Ltd",
journal = "Synthetic Metals",
title = "Copolymerization of aniline and gallic acid: Novel electroactive materials with antioxidant and antimicrobial activities",
volume = "286",
doi = "10.1016/j.synthmet.2022.117048"
}

Janošević-Ležaić, A., Pašti, I., Gledović, A., Antić-Stanković, J., Božić, D., Uskoković-Marković, S.,& Ćirić-Marjanović, G.. (2022). Copolymerization of aniline and gallic acid: Novel electroactive materials with antioxidant and antimicrobial activities. in Synthetic Metals
Elsevier Ltd., 286.
https://doi.org/10.1016/j.synthmet.2022.117048

Janošević-Ležaić A, Pašti I, Gledović A, Antić-Stanković J, Božić D, Uskoković-Marković S, Ćirić-Marjanović G. Copolymerization of aniline and gallic acid: Novel electroactive materials with antioxidant and antimicrobial activities. in Synthetic Metals. 2022;286.
doi:10.1016/j.synthmet.2022.117048 .

Janošević-Ležaić, Aleksandra, Pašti, Igor, Gledović, Ana, Antić-Stanković, Jelena, Božić, Dragana, Uskoković-Marković, Snežana, Ćirić-Marjanović, Gordana, "Copolymerization of aniline and gallic acid: Novel electroactive materials with antioxidant and antimicrobial activities" in Synthetic Metals, 286 (2022),
https://doi.org/10.1016/j.synthmet.2022.117048 . .

TY  - JOUR
AU  - Milojević-Rakić, Maja
AU  - Popadić, Daliborka
AU  - Janošević-Ležaić, Aleksandra
AU  - Jevremović, Anka
AU  - Nedić-Vasiljević, Bojana
AU  - Uskoković-Marković, Snežana
AU  - Bajuk-Bogdanović, Danica
PY  - 2022
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4062
AB  - Ecotoxicity caused by neonicotinoid pesticides is largely due to oxidative stress on non-target species. Due to the fact that reactive radical species reach the environment, materials intended for pesticide removal should be applicable for the simultaneous removal of reactive radicals, as well. This work uses the spectroscopic, adsorptive and antioxidant responses from MFI, FAU and BEA zeolites as descriptors of their potential environmental importance. Different network structures and Si/Al ratios were correlated with excellent zeolite adsorption properties, as over 200 mg g1 of investigated neonicotinoids, acetamiprid and imidacloprid, was achieved in one cycle. Additionally, after two regeneration steps, over 450 mg g1 adsorbed pesticides were retained, in three adsorption cycles. Overall the best results were detected for the FAU zeotype in both tested applications, insecticide adsorption and radical-scavenging performance, with and without insecticides present. The proposed mechanism for adsorption relies on kinetic investigation, isotherm modelling and spectroscopic post-adsorption analysis and targets zeolite hydroxyl/siloxane groups as active sites for insecticide adsorption via hydrogen bonding. Neat, welldefined zeolite structures enable their prospective application in ecotoxic species removal.
PB  - The Royal Society of Chemistry
T2  - Environmental science. Processes & impacts
T1  - MFI, BEA and FAU zeolite scavenging role in neonicotinoids and radical species elimination
VL  - 24
IS  - 2
SP  - 265
EP  - 276
DO  - 10.1039/d1em00437a
ER  - 

@article{
author = "Milojević-Rakić, Maja and Popadić, Daliborka and Janošević-Ležaić, Aleksandra and Jevremović, Anka and Nedić-Vasiljević, Bojana and Uskoković-Marković, Snežana and Bajuk-Bogdanović, Danica",
year = "2022",
abstract = "Ecotoxicity caused by neonicotinoid pesticides is largely due to oxidative stress on non-target species. Due to the fact that reactive radical species reach the environment, materials intended for pesticide removal should be applicable for the simultaneous removal of reactive radicals, as well. This work uses the spectroscopic, adsorptive and antioxidant responses from MFI, FAU and BEA zeolites as descriptors of their potential environmental importance. Different network structures and Si/Al ratios were correlated with excellent zeolite adsorption properties, as over 200 mg g1 of investigated neonicotinoids, acetamiprid and imidacloprid, was achieved in one cycle. Additionally, after two regeneration steps, over 450 mg g1 adsorbed pesticides were retained, in three adsorption cycles. Overall the best results were detected for the FAU zeotype in both tested applications, insecticide adsorption and radical-scavenging performance, with and without insecticides present. The proposed mechanism for adsorption relies on kinetic investigation, isotherm modelling and spectroscopic post-adsorption analysis and targets zeolite hydroxyl/siloxane groups as active sites for insecticide adsorption via hydrogen bonding. Neat, welldefined zeolite structures enable their prospective application in ecotoxic species removal.",
publisher = "The Royal Society of Chemistry",
journal = "Environmental science. Processes & impacts",
title = "MFI, BEA and FAU zeolite scavenging role in neonicotinoids and radical species elimination",
volume = "24",
number = "2",
pages = "265-276",
doi = "10.1039/d1em00437a"
}

Milojević-Rakić, M., Popadić, D., Janošević-Ležaić, A., Jevremović, A., Nedić-Vasiljević, B., Uskoković-Marković, S.,& Bajuk-Bogdanović, D.. (2022). MFI, BEA and FAU zeolite scavenging role in neonicotinoids and radical species elimination. in Environmental science. Processes & impacts
The Royal Society of Chemistry., 24(2), 265-276.
https://doi.org/10.1039/d1em00437a

Milojević-Rakić M, Popadić D, Janošević-Ležaić A, Jevremović A, Nedić-Vasiljević B, Uskoković-Marković S, Bajuk-Bogdanović D. MFI, BEA and FAU zeolite scavenging role in neonicotinoids and radical species elimination. in Environmental science. Processes & impacts. 2022;24(2):265-276.
doi:10.1039/d1em00437a .

Milojević-Rakić, Maja, Popadić, Daliborka, Janošević-Ležaić, Aleksandra, Jevremović, Anka, Nedić-Vasiljević, Bojana, Uskoković-Marković, Snežana, Bajuk-Bogdanović, Danica, "MFI, BEA and FAU zeolite scavenging role in neonicotinoids and radical species elimination" in Environmental science. Processes & impacts, 24, no. 2 (2022):265-276,
https://doi.org/10.1039/d1em00437a . .

TY  - JOUR
AU  - Popadić, Daliborka
AU  - Gavrilov, Nemanja
AU  - Ignjatović, Ljubiša
AU  - Krajišnik, Danina
AU  - Mentus, Slavko
AU  - Milojević-Rakić, Maja
AU  - Bajuk-Bogdanović, Danica
PY  - 2022
UR  - https://www.mdpi.com/2073-4344/12/5/519
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4099
AB  - Unmodified natural silicates (bentonite, kaolin, clinoptilolite and diatomites) were tested as adsorbents for the organic pollutants in water tables using Methylene Blue (MB) as the model adsorbate. Among the selected materials, bentonite adsorbed as much as 237 mg/g, confirming its excellent suitability for pollutant removal. Spectral evidence confirmed successful MB immobilization at the bentonite surface. Furthermore, the thermal treatment of MB-saturated adsorbent in an inert atmosphere at 700 °C produced a carbon/silicate composite. EDX confirmed the formation of the nitrogen-doped carbon overlay on the silica scaffold and the obtained composite material was probed as an electrode material for oxygen reduction in an alkaline solution. Reduction proceeded via a two-electron mechanism with the main product being HO2−, a known nucleophile, which was subsequently used to degrade/demethylate MB. The composite showed a considerable 70% MB removal rate after an hour of electrochemical treatment. The synergy between the processes of adsorption of MB and the surface-generated HO2− dictates the efficiency of the method and points to a possible route for spent adsorbent reuse in the form of a durable product for environmental protection.
PB  - MDPI
T2  - Catalysts
T1  - How to Obtain Maximum Environmental Applicability from Natural Silicates
VL  - 12
IS  - 5
DO  - 10.3390/catal12050519
ER  - 

@article{
author = "Popadić, Daliborka and Gavrilov, Nemanja and Ignjatović, Ljubiša and Krajišnik, Danina and Mentus, Slavko and Milojević-Rakić, Maja and Bajuk-Bogdanović, Danica",
year = "2022",
abstract = "Unmodified natural silicates (bentonite, kaolin, clinoptilolite and diatomites) were tested as adsorbents for the organic pollutants in water tables using Methylene Blue (MB) as the model adsorbate. Among the selected materials, bentonite adsorbed as much as 237 mg/g, confirming its excellent suitability for pollutant removal. Spectral evidence confirmed successful MB immobilization at the bentonite surface. Furthermore, the thermal treatment of MB-saturated adsorbent in an inert atmosphere at 700 °C produced a carbon/silicate composite. EDX confirmed the formation of the nitrogen-doped carbon overlay on the silica scaffold and the obtained composite material was probed as an electrode material for oxygen reduction in an alkaline solution. Reduction proceeded via a two-electron mechanism with the main product being HO2−, a known nucleophile, which was subsequently used to degrade/demethylate MB. The composite showed a considerable 70% MB removal rate after an hour of electrochemical treatment. The synergy between the processes of adsorption of MB and the surface-generated HO2− dictates the efficiency of the method and points to a possible route for spent adsorbent reuse in the form of a durable product for environmental protection.",
publisher = "MDPI",
journal = "Catalysts",
title = "How to Obtain Maximum Environmental Applicability from Natural Silicates",
volume = "12",
number = "5",
doi = "10.3390/catal12050519"
}

Popadić, D., Gavrilov, N., Ignjatović, L., Krajišnik, D., Mentus, S., Milojević-Rakić, M.,& Bajuk-Bogdanović, D.. (2022). How to Obtain Maximum Environmental Applicability from Natural Silicates. in Catalysts
MDPI., 12(5).
https://doi.org/10.3390/catal12050519

Popadić D, Gavrilov N, Ignjatović L, Krajišnik D, Mentus S, Milojević-Rakić M, Bajuk-Bogdanović D. How to Obtain Maximum Environmental Applicability from Natural Silicates. in Catalysts. 2022;12(5).
doi:10.3390/catal12050519 .

Popadić, Daliborka, Gavrilov, Nemanja, Ignjatović, Ljubiša, Krajišnik, Danina, Mentus, Slavko, Milojević-Rakić, Maja, Bajuk-Bogdanović, Danica, "How to Obtain Maximum Environmental Applicability from Natural Silicates" in Catalysts, 12, no. 5 (2022),
https://doi.org/10.3390/catal12050519 . .

TY  - JOUR
AU  - Mijailović, Nataša R.
AU  - Nedić Vasiljević, Bojana
AU  - Ranković, Maja
AU  - Milanović, Vladimir
AU  - Uskoković-Marković, Snežana
PY  - 2022
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4266
AB  - Zeolites belong to aluminosilicate microporous solids, with strong and diverse catalytic
activity, which makes them applicable in almost every kind of industrial process, particularly thanks
to their eco-friendly profile. Another crucial characteristic of zeolites is their tremendous adsorption
capability. Therefore, it is self-evident that the widespread use of zeolites is in environmental
protection, based primarily on the adsorption capacity of substances potentially harmful to the
environment, such as pharmaceuticals, pesticides, or other industry pollutants. On the other hand,
zeolites are also recognized as drug delivery systems (DDS) carriers for numerous pharmacologically
active agents. The enhanced bioactive ability of DDS zeolite as a drug carrying nanoplatform is
confirmed, making this system more specific and efficient, compared to the drug itself. These two
applications of zeolite, in fact, illustrate the importance of (ir)reversibility of the adsorption process.
This review gives deep insight into the balance and dynamics that are established during that
process, i.e., the interaction between zeolites and pharmaceuticals, helping scientists to expand their
knowledge necessarily for a more effective application of the adsorption phenomenon of zeolites.
PB  - MDPI
T2  - Catalysts
T1  - Environmental and Pharmacokinetic Aspects of Zeolite/Pharmaceuticals Systems—Two Facets of Adsorption Ability
VL  - 12
IS  - 8
DO  - 10.3390/catal12080837
ER  - 

@article{
author = "Mijailović, Nataša R. and Nedić Vasiljević, Bojana and Ranković, Maja and Milanović, Vladimir and Uskoković-Marković, Snežana",
year = "2022",
abstract = "Zeolites belong to aluminosilicate microporous solids, with strong and diverse catalytic
activity, which makes them applicable in almost every kind of industrial process, particularly thanks
to their eco-friendly profile. Another crucial characteristic of zeolites is their tremendous adsorption
capability. Therefore, it is self-evident that the widespread use of zeolites is in environmental
protection, based primarily on the adsorption capacity of substances potentially harmful to the
environment, such as pharmaceuticals, pesticides, or other industry pollutants. On the other hand,
zeolites are also recognized as drug delivery systems (DDS) carriers for numerous pharmacologically
active agents. The enhanced bioactive ability of DDS zeolite as a drug carrying nanoplatform is
confirmed, making this system more specific and efficient, compared to the drug itself. These two
applications of zeolite, in fact, illustrate the importance of (ir)reversibility of the adsorption process.
This review gives deep insight into the balance and dynamics that are established during that
process, i.e., the interaction between zeolites and pharmaceuticals, helping scientists to expand their
knowledge necessarily for a more effective application of the adsorption phenomenon of zeolites.",
publisher = "MDPI",
journal = "Catalysts",
title = "Environmental and Pharmacokinetic Aspects of Zeolite/Pharmaceuticals Systems—Two Facets of Adsorption Ability",
volume = "12",
number = "8",
doi = "10.3390/catal12080837"
}

Mijailović, N. R., Nedić Vasiljević, B., Ranković, M., Milanović, V.,& Uskoković-Marković, S.. (2022). Environmental and Pharmacokinetic Aspects of Zeolite/Pharmaceuticals Systems—Two Facets of Adsorption Ability. in Catalysts
MDPI., 12(8).
https://doi.org/10.3390/catal12080837

Mijailović NR, Nedić Vasiljević B, Ranković M, Milanović V, Uskoković-Marković S. Environmental and Pharmacokinetic Aspects of Zeolite/Pharmaceuticals Systems—Two Facets of Adsorption Ability. in Catalysts. 2022;12(8).
doi:10.3390/catal12080837 .

Mijailović, Nataša R., Nedić Vasiljević, Bojana, Ranković, Maja, Milanović, Vladimir, Uskoković-Marković, Snežana, "Environmental and Pharmacokinetic Aspects of Zeolite/Pharmaceuticals Systems—Two Facets of Adsorption Ability" in Catalysts, 12, no. 8 (2022),
https://doi.org/10.3390/catal12080837 . .

TY  - CONF
AU  - Gledović, Ana
AU  - Bajuk-Bogdanović, Danica
AU  - Uskoković-Marković, Snežana
AU  - Pavun, Leposava
AU  - Savić, Snežana
AU  - Janošević-Ležaić, Aleksandra
PY  - 2021
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4673
AB  - Aromatic plants have been used since ancient times as a source of essential oils (EOs)
which are known as natural remedies in traditional medicine systems – phytotherapy and
aromatherapy, but they are also widely used for everyday purposes (for example, as fragrant
components in skincare preparations and perfumery; as flavours and natural preservatives
in food industry). It is known that many EOs contain molecules with considerable
antioxidant activity, such as phenolic compounds, flavonoids and terpenoids, acting alone or
synergistically. Besides antimicrobial action, EOs prepared from plants form the Lamiaceae
family, such as basil −BA (Ocimum basilicum), oregano – OR (Origanum vulgare) and lemon
balm − LB (Melissa officinalis) leaves are reported to scavenge free radicals (1). Therefore,
these particular EOs and their bioactives could be good candidates for skin-protective
formulations. Nanoemulsions (NEs), especially those produced by low energy methods, are
recently proposed as prospective carriers for sensitive and natural ingredients such as EOs,
in order to ensure their stabilization. Additionally, some EOs can act as cosurfactants and
promote low energy nanoemulsification. Having in mind that EOs cannot be used undiluted,
oil-in-water NEs could be an appropriate delivery system, representing fluid formulations
with ultra-fine droplets, pleasant visual appearance, and improved stability compared to
classic macroemulsions (2). Firstly, NEs were prepared different EOs (BA, OR or LB) with
polyethylene glycol free (PEG-free) natural surfactants/emollients mixture (containing
polyglycerol-4 laurate as the main surfactant) suitable for cold processing via the Phase
inversion composition (PIC) method. NEs physicochemical stability was confirmed by
particle size distribution analysis, electrical conductivity and pH value measurements, as
well as by optical microscopy observations. The type of EO and the concentration of
surfactants/emollient mixture were proven to be crucial factors governing NE properties
and stability. Raman spectra of EOs verified their main active ingredients and detected
possible interactions with the nanocarrier (3). The antioxidant activity towards the DPPH
radical in methanol was concentration-dependent with a similar trend for neat oils and oil-
loaded NEs (OR> LB> BA). However, the ABTS test in an aqueous medium revealed notable
change in the order of activity with increased EO concentration and after EO nanonisation.
Overall, the highest antioxidant activity was observed for OR and OR-loaded NE (> 95%
INH ABTS and > 85% INH DPPH), implying at some optimal package of OR within the nanocarrier
which preserved its high antioxidant performance and ensured its stability during 6 months
of storage.
AB  - Aromatične biljke koriste se od davnina za dobijanje etarskih ulja (EOs) koja su
poznata kao prirodni lekovi u tradicionalnim sistemima lečenja – fitoterapiji i aromaterapiji,
a takođe je široko rasprostranjena njihova upotreba u svakodnevnom životu (na primer, kao
mirisne komponente u kozmetičkim proizvodima i parfemima; kao korigensi ukusa i
prirodni konzervansi u prehrambenoj industriji). Brojna EOs sadrže molekule kao što su
fenolna jedinjenja, flavonoidi i terpenoidi koji ispoljavaju značajnu antioksidativnu aktivnost,
delujući samostalno ili sinergistički. Pored antimikrobnog dejstva, EOs dobijena iz listova
biljaka familije Lamiaceae, kao što je bosiljak - BA (Ocimum basilicum), origano – OR
(Origanum vulgare) i matičnjak − LB (Melissa officinalis) deluju kao hvatači slobodnih
radikala (1). Prema tome, pomenuta EOs i njihovi bioaktivni sastojci mogu biti dobri
kandidati za razvoj formulacija za zaštitu kože. Nanoemulzije (NEs), posebno one
proizvedene niskoenergetskim metodama, odnedavno se predlažu kao prospektivni nosači
za prirodne i osetljive sastojke poput EOs, sa ciljem da se obezbedi njihova stabilizacija.
Dodatno, neka EOs imaju ulogu kosurfaktanta i pospešuju niskoenergetsku
nanoemulzifikaciju. Imajući u vidu da se EOs ne mogu koristiti nerazblažena, NEs ulje u vodi
tipa mogu biti adekvatni nosači, s obzirom da su u pitanju fluidne formulacije sa ultra-finim
veličinama kapi, prijatnim vizuelnim izgledom, kao i poboljšanom stabilnošću u poređenju sa
klasičnim makroemulzijama (2). Prvo su pripremljene NEs sa različitim EOs (BA, OR ili LB),
sa smešom prirodnim surfaktanata i emolijensa (bez polietilenglikola - PEG, gde je
poligliceril-4 laurat glavni surfaktant) koja je pogodna za izradu na hladno primenom
metode inverzije faza (engl. Phase inversion composition ‐ PIC method). Fizičkohemijska
stabilnost NEs potvrđena je analizom distribucije veličina kapi, merenjem električne
provodljivosti i pH vrednosti, kao i optičkom mikroskopijom. Nađeno je da su vrsta EO i
koncentracija smeše surfaktanata i emolijensa ključni faktori koji utiču na karakteristike i
stabilnost dobijenih NE. Tehnikom Ramanske spektroskopije potvrđeni su glavni aktivni
sastojci etarskih ulja i detektovane su moguće interakcije sa nanonosačem. Pokazano je da je
antioksidativna aktivnost prema DPPH radikalu u metanolu koncentraciono zavisna, sa
sličnim trendom za čista etarska ulja i za NEs sa uljima (OR> LB> BA). Međutim, ABTS test u
vodenoj sredini pokazao je izrazite promene u redosledu aktivnosti sa povećanjem
koncentracije EO i nakon nanonizacije EO. Generalno, najjača aktioksidativna aktivnost
primećena je u slučaju OR i OR-NE (> 95% INH ABTS i > 85% INH DPPH), što ukazuje na
optimalno pakovanje OR unutar nanonosača čime su očuvane njegove antioksidativne
performanse i obezbeđena stabilnost tokom 6 meseci čuvanja.
PB  - Savez farmaceutskih udruženja Srbije (SFUS)
C3  - Arhiv za farmaciju
T1  - Low energy nanoemulsions as potential carriers for essential oils in formulations for antioxidant skin protection
T1  - Niskoenergetske nanoemulzije kao potencijalni nosači za etarska ulja u formulacijama za antioksidativnu zaštitu kože
VL  - 71
IS  - 5 suplement
SP  - S96
EP  - S99
UR  - https://hdl.handle.net/21.15107/rcub_farfar_4673
ER  - 

@conference{
author = "Gledović, Ana and Bajuk-Bogdanović, Danica and Uskoković-Marković, Snežana and Pavun, Leposava and Savić, Snežana and Janošević-Ležaić, Aleksandra",
year = "2021",
abstract = "Aromatic plants have been used since ancient times as a source of essential oils (EOs)
which are known as natural remedies in traditional medicine systems – phytotherapy and
aromatherapy, but they are also widely used for everyday purposes (for example, as fragrant
components in skincare preparations and perfumery; as flavours and natural preservatives
in food industry). It is known that many EOs contain molecules with considerable
antioxidant activity, such as phenolic compounds, flavonoids and terpenoids, acting alone or
synergistically. Besides antimicrobial action, EOs prepared from plants form the Lamiaceae
family, such as basil −BA (Ocimum basilicum), oregano – OR (Origanum vulgare) and lemon
balm − LB (Melissa officinalis) leaves are reported to scavenge free radicals (1). Therefore,
these particular EOs and their bioactives could be good candidates for skin-protective
formulations. Nanoemulsions (NEs), especially those produced by low energy methods, are
recently proposed as prospective carriers for sensitive and natural ingredients such as EOs,
in order to ensure their stabilization. Additionally, some EOs can act as cosurfactants and
promote low energy nanoemulsification. Having in mind that EOs cannot be used undiluted,
oil-in-water NEs could be an appropriate delivery system, representing fluid formulations
with ultra-fine droplets, pleasant visual appearance, and improved stability compared to
classic macroemulsions (2). Firstly, NEs were prepared different EOs (BA, OR or LB) with
polyethylene glycol free (PEG-free) natural surfactants/emollients mixture (containing
polyglycerol-4 laurate as the main surfactant) suitable for cold processing via the Phase
inversion composition (PIC) method. NEs physicochemical stability was confirmed by
particle size distribution analysis, electrical conductivity and pH value measurements, as
well as by optical microscopy observations. The type of EO and the concentration of
surfactants/emollient mixture were proven to be crucial factors governing NE properties
and stability. Raman spectra of EOs verified their main active ingredients and detected
possible interactions with the nanocarrier (3). The antioxidant activity towards the DPPH
radical in methanol was concentration-dependent with a similar trend for neat oils and oil-
loaded NEs (OR> LB> BA). However, the ABTS test in an aqueous medium revealed notable
change in the order of activity with increased EO concentration and after EO nanonisation.
Overall, the highest antioxidant activity was observed for OR and OR-loaded NE (> 95%
INH ABTS and > 85% INH DPPH), implying at some optimal package of OR within the nanocarrier
which preserved its high antioxidant performance and ensured its stability during 6 months
of storage., Aromatične biljke koriste se od davnina za dobijanje etarskih ulja (EOs) koja su
poznata kao prirodni lekovi u tradicionalnim sistemima lečenja – fitoterapiji i aromaterapiji,
a takođe je široko rasprostranjena njihova upotreba u svakodnevnom životu (na primer, kao
mirisne komponente u kozmetičkim proizvodima i parfemima; kao korigensi ukusa i
prirodni konzervansi u prehrambenoj industriji). Brojna EOs sadrže molekule kao što su
fenolna jedinjenja, flavonoidi i terpenoidi koji ispoljavaju značajnu antioksidativnu aktivnost,
delujući samostalno ili sinergistički. Pored antimikrobnog dejstva, EOs dobijena iz listova
biljaka familije Lamiaceae, kao što je bosiljak - BA (Ocimum basilicum), origano – OR
(Origanum vulgare) i matičnjak − LB (Melissa officinalis) deluju kao hvatači slobodnih
radikala (1). Prema tome, pomenuta EOs i njihovi bioaktivni sastojci mogu biti dobri
kandidati za razvoj formulacija za zaštitu kože. Nanoemulzije (NEs), posebno one
proizvedene niskoenergetskim metodama, odnedavno se predlažu kao prospektivni nosači
za prirodne i osetljive sastojke poput EOs, sa ciljem da se obezbedi njihova stabilizacija.
Dodatno, neka EOs imaju ulogu kosurfaktanta i pospešuju niskoenergetsku
nanoemulzifikaciju. Imajući u vidu da se EOs ne mogu koristiti nerazblažena, NEs ulje u vodi
tipa mogu biti adekvatni nosači, s obzirom da su u pitanju fluidne formulacije sa ultra-finim
veličinama kapi, prijatnim vizuelnim izgledom, kao i poboljšanom stabilnošću u poređenju sa
klasičnim makroemulzijama (2). Prvo su pripremljene NEs sa različitim EOs (BA, OR ili LB),
sa smešom prirodnim surfaktanata i emolijensa (bez polietilenglikola - PEG, gde je
poligliceril-4 laurat glavni surfaktant) koja je pogodna za izradu na hladno primenom
metode inverzije faza (engl. Phase inversion composition ‐ PIC method). Fizičkohemijska
stabilnost NEs potvrđena je analizom distribucije veličina kapi, merenjem električne
provodljivosti i pH vrednosti, kao i optičkom mikroskopijom. Nađeno je da su vrsta EO i
koncentracija smeše surfaktanata i emolijensa ključni faktori koji utiču na karakteristike i
stabilnost dobijenih NE. Tehnikom Ramanske spektroskopije potvrđeni su glavni aktivni
sastojci etarskih ulja i detektovane su moguće interakcije sa nanonosačem. Pokazano je da je
antioksidativna aktivnost prema DPPH radikalu u metanolu koncentraciono zavisna, sa
sličnim trendom za čista etarska ulja i za NEs sa uljima (OR> LB> BA). Međutim, ABTS test u
vodenoj sredini pokazao je izrazite promene u redosledu aktivnosti sa povećanjem
koncentracije EO i nakon nanonizacije EO. Generalno, najjača aktioksidativna aktivnost
primećena je u slučaju OR i OR-NE (> 95% INH ABTS i > 85% INH DPPH), što ukazuje na
optimalno pakovanje OR unutar nanonosača čime su očuvane njegove antioksidativne
performanse i obezbeđena stabilnost tokom 6 meseci čuvanja.",
publisher = "Savez farmaceutskih udruženja Srbije (SFUS)",
journal = "Arhiv za farmaciju",
title = "Low energy nanoemulsions as potential carriers for essential oils in formulations for antioxidant skin protection, Niskoenergetske nanoemulzije kao potencijalni nosači za etarska ulja u formulacijama za antioksidativnu zaštitu kože",
volume = "71",
number = "5 suplement",
pages = "S96-S99",
url = "https://hdl.handle.net/21.15107/rcub_farfar_4673"
}

Gledović, A., Bajuk-Bogdanović, D., Uskoković-Marković, S., Pavun, L., Savić, S.,& Janošević-Ležaić, A.. (2021). Low energy nanoemulsions as potential carriers for essential oils in formulations for antioxidant skin protection. in Arhiv za farmaciju
Savez farmaceutskih udruženja Srbije (SFUS)., 71(5 suplement), S96-S99.
https://hdl.handle.net/21.15107/rcub_farfar_4673

Gledović A, Bajuk-Bogdanović D, Uskoković-Marković S, Pavun L, Savić S, Janošević-Ležaić A. Low energy nanoemulsions as potential carriers for essential oils in formulations for antioxidant skin protection. in Arhiv za farmaciju. 2021;71(5 suplement):S96-S99.
https://hdl.handle.net/21.15107/rcub_farfar_4673 .

Gledović, Ana, Bajuk-Bogdanović, Danica, Uskoković-Marković, Snežana, Pavun, Leposava, Savić, Snežana, Janošević-Ležaić, Aleksandra, "Low energy nanoemulsions as potential carriers for essential oils in formulations for antioxidant skin protection" in Arhiv za farmaciju, 71, no. 5 suplement (2021):S96-S99,
https://hdl.handle.net/21.15107/rcub_farfar_4673 .

TY  - CONF
AU  - Rupar, Jelena
AU  - Aleksić, Mara
AU  - Dobričić, Vladimir
AU  - Čudina, Olivera
AU  - Brborić, Jasmina
AU  - Gavrilov, Nemanja
PY  - 2021
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5482
AB  - Oxidation of newly synthesized acridine derivatives was studied using cyclic voltammetry at glassy
carbon electrode. Oxidation occurs as irreversible, diffusion-controlled process at pH 4.6 for
compounds 1-3 and as adsorption controlled process for compound 4. The interaction between newly
synthesized acridine compounds (compounds 1-4) and dsDNA was studied using a multilayer dsDNA
biosensor applying square wave voltammetry. Peak current corresponding to deoxyadenosine
decreased after 30 minutes of interaction suggesting interaction with dsDNA.
PB  - Society of Physical Chemists of Serbia
C3  - Physical Chemistry 2021 (Proceedings), 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 20-24, 2021. Belgrade, Serbia
T1  - Electrochemical oxidation and interaction of newly synthesized acridine derivatives with DNA
VL  - I
SP  - 294
EP  - 297
UR  - https://hdl.handle.net/21.15107/rcub_farfar_5482
ER  - 

@conference{
author = "Rupar, Jelena and Aleksić, Mara and Dobričić, Vladimir and Čudina, Olivera and Brborić, Jasmina and Gavrilov, Nemanja",
year = "2021",
abstract = "Oxidation of newly synthesized acridine derivatives was studied using cyclic voltammetry at glassy
carbon electrode. Oxidation occurs as irreversible, diffusion-controlled process at pH 4.6 for
compounds 1-3 and as adsorption controlled process for compound 4. The interaction between newly
synthesized acridine compounds (compounds 1-4) and dsDNA was studied using a multilayer dsDNA
biosensor applying square wave voltammetry. Peak current corresponding to deoxyadenosine
decreased after 30 minutes of interaction suggesting interaction with dsDNA.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical Chemistry 2021 (Proceedings), 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 20-24, 2021. Belgrade, Serbia",
title = "Electrochemical oxidation and interaction of newly synthesized acridine derivatives with DNA",
volume = "I",
pages = "294-297",
url = "https://hdl.handle.net/21.15107/rcub_farfar_5482"
}

Rupar, J., Aleksić, M., Dobričić, V., Čudina, O., Brborić, J.,& Gavrilov, N.. (2021). Electrochemical oxidation and interaction of newly synthesized acridine derivatives with DNA. in Physical Chemistry 2021 (Proceedings), 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 20-24, 2021. Belgrade, Serbia
Society of Physical Chemists of Serbia., I, 294-297.
https://hdl.handle.net/21.15107/rcub_farfar_5482

Rupar J, Aleksić M, Dobričić V, Čudina O, Brborić J, Gavrilov N. Electrochemical oxidation and interaction of newly synthesized acridine derivatives with DNA. in Physical Chemistry 2021 (Proceedings), 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 20-24, 2021. Belgrade, Serbia. 2021;I:294-297.
https://hdl.handle.net/21.15107/rcub_farfar_5482 .

Rupar, Jelena, Aleksić, Mara, Dobričić, Vladimir, Čudina, Olivera, Brborić, Jasmina, Gavrilov, Nemanja, "Electrochemical oxidation and interaction of newly synthesized acridine derivatives with DNA" in Physical Chemistry 2021 (Proceedings), 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 20-24, 2021. Belgrade, Serbia, I (2021):294-297,
https://hdl.handle.net/21.15107/rcub_farfar_5482 .

TY  - JOUR
AU  - Janićijević, Dejana
AU  - Jevremović, Anka
AU  - Janošević-Ležaić, Aleksandra
AU  - Nedić-Vasiljević, Bojana
AU  - Uskoković-Marković, Snežana
AU  - Bajuk-Bogdanović, Danica
AU  - Milojević-Rakić, Maja
PY  - 2021
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3970
AB  - Composite materials consisting of the silver salt of dodecatungstophosphoric acid and HBEA zeolite are developed in order to give materials of superior adsorption properties for aqueous pesticide removal. Two-step impregnation and an ion-exchange method with variable constituent mass ratios were employed as synthesis procedures. One of the study goals was to optimize the composite preparation for efficient elimination of glyphosate pesticide and to investigate the modulation of antioxidant activity in the presence of pesticide. Based on comprehensive results, we propose mechanisms for simultaneous glyphosate removal and antioxidant activity. Spectroscopic analysis shows that the applied two-step impregnation method results in advanced composite materials with evenly distributed active sites for glyphosate adsorption and radical-scavenging activity. The original Krishnamurti isotherm is successfully used to fit pesticide adsorption data, pointing to co-operative adsorption of glyphosate on partly saturated adsorbents sites. The amount of glyphosate adsorbed from water suspension was 378 mg per gram of composite material, the highest value reported for glyphosate removal to date.
PB  - Elsevier Ltd
T2  - Journal of Environmental Chemical Engineering
T1  - Comparative assessment of pesticide adsorption capacity and antioxidant activity of Silver Dodecatungstophosphate/HΒEA zeolite composites
VL  - 9
IS  - 6
DO  - 10.1016/j.jece.2021.106341
ER  - 

@article{
author = "Janićijević, Dejana and Jevremović, Anka and Janošević-Ležaić, Aleksandra and Nedić-Vasiljević, Bojana and Uskoković-Marković, Snežana and Bajuk-Bogdanović, Danica and Milojević-Rakić, Maja",
year = "2021",
abstract = "Composite materials consisting of the silver salt of dodecatungstophosphoric acid and HBEA zeolite are developed in order to give materials of superior adsorption properties for aqueous pesticide removal. Two-step impregnation and an ion-exchange method with variable constituent mass ratios were employed as synthesis procedures. One of the study goals was to optimize the composite preparation for efficient elimination of glyphosate pesticide and to investigate the modulation of antioxidant activity in the presence of pesticide. Based on comprehensive results, we propose mechanisms for simultaneous glyphosate removal and antioxidant activity. Spectroscopic analysis shows that the applied two-step impregnation method results in advanced composite materials with evenly distributed active sites for glyphosate adsorption and radical-scavenging activity. The original Krishnamurti isotherm is successfully used to fit pesticide adsorption data, pointing to co-operative adsorption of glyphosate on partly saturated adsorbents sites. The amount of glyphosate adsorbed from water suspension was 378 mg per gram of composite material, the highest value reported for glyphosate removal to date.",
publisher = "Elsevier Ltd",
journal = "Journal of Environmental Chemical Engineering",
title = "Comparative assessment of pesticide adsorption capacity and antioxidant activity of Silver Dodecatungstophosphate/HΒEA zeolite composites",
volume = "9",
number = "6",
doi = "10.1016/j.jece.2021.106341"
}

Janićijević, D., Jevremović, A., Janošević-Ležaić, A., Nedić-Vasiljević, B., Uskoković-Marković, S., Bajuk-Bogdanović, D.,& Milojević-Rakić, M.. (2021). Comparative assessment of pesticide adsorption capacity and antioxidant activity of Silver Dodecatungstophosphate/HΒEA zeolite composites. in Journal of Environmental Chemical Engineering
Elsevier Ltd., 9(6).
https://doi.org/10.1016/j.jece.2021.106341

Janićijević D, Jevremović A, Janošević-Ležaić A, Nedić-Vasiljević B, Uskoković-Marković S, Bajuk-Bogdanović D, Milojević-Rakić M. Comparative assessment of pesticide adsorption capacity and antioxidant activity of Silver Dodecatungstophosphate/HΒEA zeolite composites. in Journal of Environmental Chemical Engineering. 2021;9(6).
doi:10.1016/j.jece.2021.106341 .

Janićijević, Dejana, Jevremović, Anka, Janošević-Ležaić, Aleksandra, Nedić-Vasiljević, Bojana, Uskoković-Marković, Snežana, Bajuk-Bogdanović, Danica, Milojević-Rakić, Maja, "Comparative assessment of pesticide adsorption capacity and antioxidant activity of Silver Dodecatungstophosphate/HΒEA zeolite composites" in Journal of Environmental Chemical Engineering, 9, no. 6 (2021),
https://doi.org/10.1016/j.jece.2021.106341 . .

TY  - JOUR
AU  - Janićijević, Dejana
AU  - Uskoković-Marković, Snežana
AU  - Popa, Alexandru
AU  - Nedić-Vasiljević, Bojana
AU  - Jevremović, Anka
AU  - Milojević-Rakić, Maja
AU  - Bajuk-Bogdanović, Danica
PY  - 2021
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3792
AB  - Heteropolyacids and their salts comprise catalytic centers for the production of ethylene, one of the most important constituents in the chemical industry. The paper emphasizes different synthesis routes of hybrid materials consisting of dodecatungstophosphoric acid silver salt (AgPW) and β zeolite—stepwise wet impregnation, silver-exchange in β zeolite, and dry mixing of precursors. Composite preparation procedures induced minor effects on the weak acid sites, while strong acid sites were increased significantly. β/AgPW composites prepared by two-steps wet impregnation and ion-exchange procedures have strong acid sites content and total acidity higher in comparison to the pure AgPW salt and β zeolite. This is a result of precursors synergetic effect—cumulative strong acidic sites are generated in the presence of well-dispersed Keggin ions on the zeolite network. Composite samples with a higher content of strong acid centers exhibit higher conversion in the ethanol dehydration reaction, i.e., the ion-exchanged βAgPW sample has attained a conversion over 81%, while the wet-impregnated sample has a significant 86%. The distribution and presence of AgPW active phase are found to be crucial for both stable conversion and high selectivity results in ethylene production from ethanol, which is regarded as one of the most significant processes in environmental and sustainable industrial chemistry. Graphic abstract: [Figure not available: see fulltext.]
PB  - Springer Science and Business Media Deutschland GmbH
T2  - Chemical Papers
T1  - The impact of preparation route on the performance of silver dodecatungstophosphate/β zeolite catalysts in the ethylene production
VL  - 75
SP  - 3169
EP  - 3180
DO  - 10.1007/s11696-021-01557-3
ER  - 

@article{
author = "Janićijević, Dejana and Uskoković-Marković, Snežana and Popa, Alexandru and Nedić-Vasiljević, Bojana and Jevremović, Anka and Milojević-Rakić, Maja and Bajuk-Bogdanović, Danica",
year = "2021",
abstract = "Heteropolyacids and their salts comprise catalytic centers for the production of ethylene, one of the most important constituents in the chemical industry. The paper emphasizes different synthesis routes of hybrid materials consisting of dodecatungstophosphoric acid silver salt (AgPW) and β zeolite—stepwise wet impregnation, silver-exchange in β zeolite, and dry mixing of precursors. Composite preparation procedures induced minor effects on the weak acid sites, while strong acid sites were increased significantly. β/AgPW composites prepared by two-steps wet impregnation and ion-exchange procedures have strong acid sites content and total acidity higher in comparison to the pure AgPW salt and β zeolite. This is a result of precursors synergetic effect—cumulative strong acidic sites are generated in the presence of well-dispersed Keggin ions on the zeolite network. Composite samples with a higher content of strong acid centers exhibit higher conversion in the ethanol dehydration reaction, i.e., the ion-exchanged βAgPW sample has attained a conversion over 81%, while the wet-impregnated sample has a significant 86%. The distribution and presence of AgPW active phase are found to be crucial for both stable conversion and high selectivity results in ethylene production from ethanol, which is regarded as one of the most significant processes in environmental and sustainable industrial chemistry. Graphic abstract: [Figure not available: see fulltext.]",
publisher = "Springer Science and Business Media Deutschland GmbH",
journal = "Chemical Papers",
title = "The impact of preparation route on the performance of silver dodecatungstophosphate/β zeolite catalysts in the ethylene production",
volume = "75",
pages = "3169-3180",
doi = "10.1007/s11696-021-01557-3"
}

Janićijević, D., Uskoković-Marković, S., Popa, A., Nedić-Vasiljević, B., Jevremović, A., Milojević-Rakić, M.,& Bajuk-Bogdanović, D.. (2021). The impact of preparation route on the performance of silver dodecatungstophosphate/β zeolite catalysts in the ethylene production. in Chemical Papers
Springer Science and Business Media Deutschland GmbH., 75, 3169-3180.
https://doi.org/10.1007/s11696-021-01557-3

Janićijević D, Uskoković-Marković S, Popa A, Nedić-Vasiljević B, Jevremović A, Milojević-Rakić M, Bajuk-Bogdanović D. The impact of preparation route on the performance of silver dodecatungstophosphate/β zeolite catalysts in the ethylene production. in Chemical Papers. 2021;75:3169-3180.
doi:10.1007/s11696-021-01557-3 .

Janićijević, Dejana, Uskoković-Marković, Snežana, Popa, Alexandru, Nedić-Vasiljević, Bojana, Jevremović, Anka, Milojević-Rakić, Maja, Bajuk-Bogdanović, Danica, "The impact of preparation route on the performance of silver dodecatungstophosphate/β zeolite catalysts in the ethylene production" in Chemical Papers, 75 (2021):3169-3180,
https://doi.org/10.1007/s11696-021-01557-3 . .

TY  - JOUR
AU  - Jevremović, Anka
AU  - Nedić-Vasiljević, Bojana
AU  - Popa, Alexandru
AU  - Uskoković-Marković, Snežana
AU  - Ignjatović, Ljubiša
AU  - Bajuk-Bogdanović, Danica
AU  - Milojević-Rakić, Maja
PY  - 2021
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3783
AB  - Environmental implementation of novel composite materials comprising potassium tungstophosphate (KPW) and ZSM-5 zeolite was tested in ethene production and pesticide removal. The study revealed that the binding of KPW to ZSM-5 zeolites of different Si/Al ratios affects the formation of active centres for catalytic and adsorption processes. Brønsted active sites present in the zeolite framework are synergistically joined with Lewis centres and additional Brønsted centres through the impregnation of potassium tungstophosphate, which resulted in improvement of stability and activity of investigated materials. Adsorption and catalytic performance were found to be influenced by the order of addition of salt precursors and by post-synthesis thermal treatment. The best results found both in ethanol dehydration and nicosulfuron removal were for the same sample of KPW supported at zeolite ZSM-5 (SiO2/Al2O3 = 30). The prominent ethanol conversion of 98% and the highest and most stable selectivity toward ethene were evidenced, along with the capacity of 28.4 mg of targeted pesticide retained per gram of designed KPW/ZSM composite. This comprehensive investigation enabled insight into active site formations in the efficient KPW/ZSM composites. Different approaches to implementation revealed that a lower Si/Al ratio in zeolite promotes efficient K+ exchange, which combined with two-phased in situ preparation of KPW as active phase, evidently leads to the formation of isolated sites of superior activity for both catalytic and adsorptive procedures.
PB  - Elsevier B.V.
T2  - Microporous and Mesoporous Materials
T1  - The environmental impact of potassium tungstophosphate/ZSM-5 zeolite: Insight into catalysis and adsorption processes
VL  - 315
DO  - 10.1016/j.micromeso.2021.110925
ER  - 

@article{
author = "Jevremović, Anka and Nedić-Vasiljević, Bojana and Popa, Alexandru and Uskoković-Marković, Snežana and Ignjatović, Ljubiša and Bajuk-Bogdanović, Danica and Milojević-Rakić, Maja",
year = "2021",
abstract = "Environmental implementation of novel composite materials comprising potassium tungstophosphate (KPW) and ZSM-5 zeolite was tested in ethene production and pesticide removal. The study revealed that the binding of KPW to ZSM-5 zeolites of different Si/Al ratios affects the formation of active centres for catalytic and adsorption processes. Brønsted active sites present in the zeolite framework are synergistically joined with Lewis centres and additional Brønsted centres through the impregnation of potassium tungstophosphate, which resulted in improvement of stability and activity of investigated materials. Adsorption and catalytic performance were found to be influenced by the order of addition of salt precursors and by post-synthesis thermal treatment. The best results found both in ethanol dehydration and nicosulfuron removal were for the same sample of KPW supported at zeolite ZSM-5 (SiO2/Al2O3 = 30). The prominent ethanol conversion of 98% and the highest and most stable selectivity toward ethene were evidenced, along with the capacity of 28.4 mg of targeted pesticide retained per gram of designed KPW/ZSM composite. This comprehensive investigation enabled insight into active site formations in the efficient KPW/ZSM composites. Different approaches to implementation revealed that a lower Si/Al ratio in zeolite promotes efficient K+ exchange, which combined with two-phased in situ preparation of KPW as active phase, evidently leads to the formation of isolated sites of superior activity for both catalytic and adsorptive procedures.",
publisher = "Elsevier B.V.",
journal = "Microporous and Mesoporous Materials",
title = "The environmental impact of potassium tungstophosphate/ZSM-5 zeolite: Insight into catalysis and adsorption processes",
volume = "315",
doi = "10.1016/j.micromeso.2021.110925"
}

Jevremović, A., Nedić-Vasiljević, B., Popa, A., Uskoković-Marković, S., Ignjatović, L., Bajuk-Bogdanović, D.,& Milojević-Rakić, M.. (2021). The environmental impact of potassium tungstophosphate/ZSM-5 zeolite: Insight into catalysis and adsorption processes. in Microporous and Mesoporous Materials
Elsevier B.V.., 315.
https://doi.org/10.1016/j.micromeso.2021.110925

Jevremović A, Nedić-Vasiljević B, Popa A, Uskoković-Marković S, Ignjatović L, Bajuk-Bogdanović D, Milojević-Rakić M. The environmental impact of potassium tungstophosphate/ZSM-5 zeolite: Insight into catalysis and adsorption processes. in Microporous and Mesoporous Materials. 2021;315.
doi:10.1016/j.micromeso.2021.110925 .

Jevremović, Anka, Nedić-Vasiljević, Bojana, Popa, Alexandru, Uskoković-Marković, Snežana, Ignjatović, Ljubiša, Bajuk-Bogdanović, Danica, Milojević-Rakić, Maja, "The environmental impact of potassium tungstophosphate/ZSM-5 zeolite: Insight into catalysis and adsorption processes" in Microporous and Mesoporous Materials, 315 (2021),
https://doi.org/10.1016/j.micromeso.2021.110925 . .

TY  - JOUR
AU  - Popa, Alexandru
AU  - Borcanescu, Silvana
AU  - Holclajtner-Antunović, Ivanka
AU  - Bajuk-Bogdanović, Danica
AU  - Uskoković-Marković, Snežana
PY  - 2021
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3726
AB  - In this study, the preparation of some large-pore ordered mesoporous silicas using a proper surfactant with different swelling agents was carried out. The synthesis of conventional SBA-15 was modified to obtain pore-expanded materials, with pore diameters up to 10 nm. To use a micelle swelling agent with a moderate swelling ability, three swelling agents were selected: 1-phenyl-decane (Dec), butyl benzene (BB), and mesitylene (Mes). These syntheses aimed to achieve a pore diameter enlargement but at the same time to avoid the formation of heterogeneous and/or poorly defined nanostructure of silica. The CO2 adsorbents were obtained by post-synthesis functionalization treatments carried out by grafting with 3-aminopropyl triethoxysilane. The CO2 adsorption/desorption experiments showed that carbon dioxide sorption capacities depend on the textural characteristics and the temperature used for the adsorption process. Good CO2 adsorption capacities were obtained for all prepared adsorbents, especially for SSBA-15-Mes-sil and SSBA-15-BB-sil samples. At 50 °C, the SSBA-15-Mes-sil sample has an adsorption capacity of 3.58 mmol CO2/g SiO2, and an efficiency of amino groups of 0.99 mmol CO2/mmol NH2. The results of adsorption capacities are comparable or even superior with the ones reported in literature for mesoporous silica functionalized with different amines. After nine adsorption–desorption cycles, the performance of the SSBA-15-Mes-sil adsorbent is relatively stable, with a low decrease in the adsorption capacity (0.1 mmol/g of CO2, i.e., 2.8% of initial capacity). These studies show the potential of mesoporous silica for carbon dioxide capture.
PB  - Springer Nature
T2  - Journal of Porous Materials
T1  - Preparation and characterisation of amino-functionalized pore-expanded mesoporous silica for carbon dioxide capture
VL  - 28
SP  - 143
EP  - 156
DO  - 10.1007/s10934-020-00974-1
ER  - 

@article{
author = "Popa, Alexandru and Borcanescu, Silvana and Holclajtner-Antunović, Ivanka and Bajuk-Bogdanović, Danica and Uskoković-Marković, Snežana",
year = "2021",
abstract = "In this study, the preparation of some large-pore ordered mesoporous silicas using a proper surfactant with different swelling agents was carried out. The synthesis of conventional SBA-15 was modified to obtain pore-expanded materials, with pore diameters up to 10 nm. To use a micelle swelling agent with a moderate swelling ability, three swelling agents were selected: 1-phenyl-decane (Dec), butyl benzene (BB), and mesitylene (Mes). These syntheses aimed to achieve a pore diameter enlargement but at the same time to avoid the formation of heterogeneous and/or poorly defined nanostructure of silica. The CO2 adsorbents were obtained by post-synthesis functionalization treatments carried out by grafting with 3-aminopropyl triethoxysilane. The CO2 adsorption/desorption experiments showed that carbon dioxide sorption capacities depend on the textural characteristics and the temperature used for the adsorption process. Good CO2 adsorption capacities were obtained for all prepared adsorbents, especially for SSBA-15-Mes-sil and SSBA-15-BB-sil samples. At 50 °C, the SSBA-15-Mes-sil sample has an adsorption capacity of 3.58 mmol CO2/g SiO2, and an efficiency of amino groups of 0.99 mmol CO2/mmol NH2. The results of adsorption capacities are comparable or even superior with the ones reported in literature for mesoporous silica functionalized with different amines. After nine adsorption–desorption cycles, the performance of the SSBA-15-Mes-sil adsorbent is relatively stable, with a low decrease in the adsorption capacity (0.1 mmol/g of CO2, i.e., 2.8% of initial capacity). These studies show the potential of mesoporous silica for carbon dioxide capture.",
publisher = "Springer Nature",
journal = "Journal of Porous Materials",
title = "Preparation and characterisation of amino-functionalized pore-expanded mesoporous silica for carbon dioxide capture",
volume = "28",
pages = "143-156",
doi = "10.1007/s10934-020-00974-1"
}

Popa, A., Borcanescu, S., Holclajtner-Antunović, I., Bajuk-Bogdanović, D.,& Uskoković-Marković, S.. (2021). Preparation and characterisation of amino-functionalized pore-expanded mesoporous silica for carbon dioxide capture. in Journal of Porous Materials
Springer Nature., 28, 143-156.
https://doi.org/10.1007/s10934-020-00974-1

Popa A, Borcanescu S, Holclajtner-Antunović I, Bajuk-Bogdanović D, Uskoković-Marković S. Preparation and characterisation of amino-functionalized pore-expanded mesoporous silica for carbon dioxide capture. in Journal of Porous Materials. 2021;28:143-156.
doi:10.1007/s10934-020-00974-1 .

Popa, Alexandru, Borcanescu, Silvana, Holclajtner-Antunović, Ivanka, Bajuk-Bogdanović, Danica, Uskoković-Marković, Snežana, "Preparation and characterisation of amino-functionalized pore-expanded mesoporous silica for carbon dioxide capture" in Journal of Porous Materials, 28 (2021):143-156,
https://doi.org/10.1007/s10934-020-00974-1 . .

TY  - JOUR
AU  - Janićijević, Dejana
AU  - Uskoković-Marković, Snežana
AU  - Ranković, Dragan
AU  - Milenković, Marina
AU  - Jevremović, Anka
AU  - Nedić-Vasiljević, Bojana
AU  - Milojević-Rakić, Maja
AU  - Bajuk-Bogdanović, Danica
PY  - 2020
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3587
AB  - Novel composites of BEA zeolite and silver tungstophosphate were prepared by different procedures: two-step impregnation, ion-exchange, and as physical mixtures with varying component mass ratios. Composites were characterized using Atomic force microscopy, Infrared, Raman and Atomic absorption spectroscopy, and results were related to adsorption properties and antimicrobial efficiencies of the composites. Prepared samples were tested as antimicrobial agents for fungal and different bacterial strains, as well as for adsorbents for pesticide nicosulfuron in aqueous solutions by using High-performance liquid chromatography. Experimental conditions for batch adsorption testing were optimized in order to efficiently eliminate nicosulfuron from aqueous solutions, while enabling antimicrobial activity of these advanced materials. Antimicrobial efficiency of composites was verified, and indicated that silver ion persistence in the solid phase is of utmost significance for the antimicrobial activity. Spectroscopic investigation revealed interaction of the silver tungstophosphate active phase and the zeolite framework, giving evidence of uniform distribution of active sites in the synthesized materials that proved to be essential for adsorption application. The best obtained adsorption capacity, as well as highest antimicrobial efficiency, is found for composite samples prepared by two-step impregnation with (BEA: silver tungstophosphate) mass ratio 2:1. The amount of nicosulfuron removed from water suspension was 38.2 mg per gram of composite, and the minimum inhibitory concentration determined for all investigated gram-negative bacteria was 125 μg mL−1.
PB  - Elsevier
T2  - Science of the Total Environment
T1  - Double active BEA zeolite/silver tungstophosphates – Antimicrobial effects and pesticide removal
VL  - 735
DO  - 10.1016/j.scitotenv.2020.139530
ER  - 

@article{
author = "Janićijević, Dejana and Uskoković-Marković, Snežana and Ranković, Dragan and Milenković, Marina and Jevremović, Anka and Nedić-Vasiljević, Bojana and Milojević-Rakić, Maja and Bajuk-Bogdanović, Danica",
year = "2020",
abstract = "Novel composites of BEA zeolite and silver tungstophosphate were prepared by different procedures: two-step impregnation, ion-exchange, and as physical mixtures with varying component mass ratios. Composites were characterized using Atomic force microscopy, Infrared, Raman and Atomic absorption spectroscopy, and results were related to adsorption properties and antimicrobial efficiencies of the composites. Prepared samples were tested as antimicrobial agents for fungal and different bacterial strains, as well as for adsorbents for pesticide nicosulfuron in aqueous solutions by using High-performance liquid chromatography. Experimental conditions for batch adsorption testing were optimized in order to efficiently eliminate nicosulfuron from aqueous solutions, while enabling antimicrobial activity of these advanced materials. Antimicrobial efficiency of composites was verified, and indicated that silver ion persistence in the solid phase is of utmost significance for the antimicrobial activity. Spectroscopic investigation revealed interaction of the silver tungstophosphate active phase and the zeolite framework, giving evidence of uniform distribution of active sites in the synthesized materials that proved to be essential for adsorption application. The best obtained adsorption capacity, as well as highest antimicrobial efficiency, is found for composite samples prepared by two-step impregnation with (BEA: silver tungstophosphate) mass ratio 2:1. The amount of nicosulfuron removed from water suspension was 38.2 mg per gram of composite, and the minimum inhibitory concentration determined for all investigated gram-negative bacteria was 125 μg mL−1.",
publisher = "Elsevier",
journal = "Science of the Total Environment",
title = "Double active BEA zeolite/silver tungstophosphates – Antimicrobial effects and pesticide removal",
volume = "735",
doi = "10.1016/j.scitotenv.2020.139530"
}

Janićijević, D., Uskoković-Marković, S., Ranković, D., Milenković, M., Jevremović, A., Nedić-Vasiljević, B., Milojević-Rakić, M.,& Bajuk-Bogdanović, D.. (2020). Double active BEA zeolite/silver tungstophosphates – Antimicrobial effects and pesticide removal. in Science of the Total Environment
Elsevier., 735.
https://doi.org/10.1016/j.scitotenv.2020.139530

Janićijević D, Uskoković-Marković S, Ranković D, Milenković M, Jevremović A, Nedić-Vasiljević B, Milojević-Rakić M, Bajuk-Bogdanović D. Double active BEA zeolite/silver tungstophosphates – Antimicrobial effects and pesticide removal. in Science of the Total Environment. 2020;735.
doi:10.1016/j.scitotenv.2020.139530 .

Janićijević, Dejana, Uskoković-Marković, Snežana, Ranković, Dragan, Milenković, Marina, Jevremović, Anka, Nedić-Vasiljević, Bojana, Milojević-Rakić, Maja, Bajuk-Bogdanović, Danica, "Double active BEA zeolite/silver tungstophosphates – Antimicrobial effects and pesticide removal" in Science of the Total Environment, 735 (2020),
https://doi.org/10.1016/j.scitotenv.2020.139530 . .