Preparation, characterization and catalytic activity of mesoporous Ag2HPW12O40/SBA-15 and Ag2HPW12O40/TiO2 composites
Само за регистроване кориснике
2015
Аутори
Holclajtner-Antunović, IvankaBajuk-Bogdanović, Danica
Popa, Alexandru
Sasca, Viorel
Nedić-Vasiljević, Bojana
Rakić, Aleksandra
Uskoković-Marković, Snežana
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The current study reports the synthesis and characterization of tungstophosphoric acid and its acid silver salt supported on mesoporous molecular sieve SBA-15 and TiO2. Because silver salts are partially insoluble, the SBA-15 and TiO2 supported silver acid salts were prepared by two step sequential impregnations. The synthesized catalysts were characterized by various physicochemical methods such as Fourier transform infrared and Raman spectroscopy, differential thermal analysis, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy and nitrogen physisorption at -196 degrees C. It is observed that both active phases keep their Keggin-type structure after being supported on the supports while their specific surface area is considerably increased by deposition on mesoporous substrates. The results also indicated that the synthesized catalysts retained the morphology specific for each of the supports, while their thermal stability is increased in comparison with thei...r active phases. The catalytic activity of the prepared catalysts was probed for the vapor phase dehydration of ethanol at 300 degrees C. Results revealed that all the catalysts show considerably improved catalytic activity in comparison to the bulk active phases.
Кључне речи:
Composite materials / Raman spectroscopy and scattering / Thermogravimetric analysis (TGA) / AdsorptionИзвор:
Materials Chemistry and Physics, 2015, 160, 359-368Издавач:
- Elsevier Science Sa, Lausanne
Финансирање / пројекти:
- Електропроводни и редокс-активни полимери и олигомери: синтеза, структура, својства и примена (RS-MESTD-Basic Research (BR or ON)-172043)
DOI: 10.1016/j.matchemphys.2015.04.052
ISSN: 0254-0584
WoS: 000356210200046
Scopus: 2-s2.0-84929949847
Институција/група
PharmacyTY - JOUR AU - Holclajtner-Antunović, Ivanka AU - Bajuk-Bogdanović, Danica AU - Popa, Alexandru AU - Sasca, Viorel AU - Nedić-Vasiljević, Bojana AU - Rakić, Aleksandra AU - Uskoković-Marković, Snežana PY - 2015 UR - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2460 AB - The current study reports the synthesis and characterization of tungstophosphoric acid and its acid silver salt supported on mesoporous molecular sieve SBA-15 and TiO2. Because silver salts are partially insoluble, the SBA-15 and TiO2 supported silver acid salts were prepared by two step sequential impregnations. The synthesized catalysts were characterized by various physicochemical methods such as Fourier transform infrared and Raman spectroscopy, differential thermal analysis, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy and nitrogen physisorption at -196 degrees C. It is observed that both active phases keep their Keggin-type structure after being supported on the supports while their specific surface area is considerably increased by deposition on mesoporous substrates. The results also indicated that the synthesized catalysts retained the morphology specific for each of the supports, while their thermal stability is increased in comparison with their active phases. The catalytic activity of the prepared catalysts was probed for the vapor phase dehydration of ethanol at 300 degrees C. Results revealed that all the catalysts show considerably improved catalytic activity in comparison to the bulk active phases. PB - Elsevier Science Sa, Lausanne T2 - Materials Chemistry and Physics T1 - Preparation, characterization and catalytic activity of mesoporous Ag2HPW12O40/SBA-15 and Ag2HPW12O40/TiO2 composites VL - 160 SP - 359 EP - 368 DO - 10.1016/j.matchemphys.2015.04.052 ER -
@article{ author = "Holclajtner-Antunović, Ivanka and Bajuk-Bogdanović, Danica and Popa, Alexandru and Sasca, Viorel and Nedić-Vasiljević, Bojana and Rakić, Aleksandra and Uskoković-Marković, Snežana", year = "2015", abstract = "The current study reports the synthesis and characterization of tungstophosphoric acid and its acid silver salt supported on mesoporous molecular sieve SBA-15 and TiO2. Because silver salts are partially insoluble, the SBA-15 and TiO2 supported silver acid salts were prepared by two step sequential impregnations. The synthesized catalysts were characterized by various physicochemical methods such as Fourier transform infrared and Raman spectroscopy, differential thermal analysis, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy and nitrogen physisorption at -196 degrees C. It is observed that both active phases keep their Keggin-type structure after being supported on the supports while their specific surface area is considerably increased by deposition on mesoporous substrates. The results also indicated that the synthesized catalysts retained the morphology specific for each of the supports, while their thermal stability is increased in comparison with their active phases. The catalytic activity of the prepared catalysts was probed for the vapor phase dehydration of ethanol at 300 degrees C. Results revealed that all the catalysts show considerably improved catalytic activity in comparison to the bulk active phases.", publisher = "Elsevier Science Sa, Lausanne", journal = "Materials Chemistry and Physics", title = "Preparation, characterization and catalytic activity of mesoporous Ag2HPW12O40/SBA-15 and Ag2HPW12O40/TiO2 composites", volume = "160", pages = "359-368", doi = "10.1016/j.matchemphys.2015.04.052" }
Holclajtner-Antunović, I., Bajuk-Bogdanović, D., Popa, A., Sasca, V., Nedić-Vasiljević, B., Rakić, A.,& Uskoković-Marković, S.. (2015). Preparation, characterization and catalytic activity of mesoporous Ag2HPW12O40/SBA-15 and Ag2HPW12O40/TiO2 composites. in Materials Chemistry and Physics Elsevier Science Sa, Lausanne., 160, 359-368. https://doi.org/10.1016/j.matchemphys.2015.04.052
Holclajtner-Antunović I, Bajuk-Bogdanović D, Popa A, Sasca V, Nedić-Vasiljević B, Rakić A, Uskoković-Marković S. Preparation, characterization and catalytic activity of mesoporous Ag2HPW12O40/SBA-15 and Ag2HPW12O40/TiO2 composites. in Materials Chemistry and Physics. 2015;160:359-368. doi:10.1016/j.matchemphys.2015.04.052 .
Holclajtner-Antunović, Ivanka, Bajuk-Bogdanović, Danica, Popa, Alexandru, Sasca, Viorel, Nedić-Vasiljević, Bojana, Rakić, Aleksandra, Uskoković-Marković, Snežana, "Preparation, characterization and catalytic activity of mesoporous Ag2HPW12O40/SBA-15 and Ag2HPW12O40/TiO2 composites" in Materials Chemistry and Physics, 160 (2015):359-368, https://doi.org/10.1016/j.matchemphys.2015.04.052 . .