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dc.creatorMilikić, Jadrank
dc.creatorSavić, Marjetka
dc.creatorJanošević-Ležaić, Aleksandra
dc.creatorŠljukić, Biljana
dc.creatorĆirić-Marjanović, Gordana
dc.date.accessioned2024-03-26T15:29:19Z
dc.date.available2024-03-26T15:29:19Z
dc.date.issued2024
dc.identifier.issn2073-4360
dc.identifier.urihttps://farfar.pharmacy.bg.ac.rs/handle/123456789/5572
dc.description.abstractFor the first time, composites of metal-organic framework MOF-5 and conjugated polymer polyaniline (PANI), (MOF-5/PANI), prepared using PANI in its conducting (emeraldine salt, ES) or nonconducting form (emeraldine base, EB) at various MOF-5 and PANI mass ratios, were evaluated as electrode materials for the electrochemical detection of cadmium (Cd2+) and lead (Pb2+) ions in aqueous solutions. Testing of individual components of composites, PANI-ES, PANI-EB, and MOF-5, was also performed for comparison. Materials are characterized by Raman spectroscopy, scanning electron microscopy (SEM) and dynamic light scattering (DLS), and their electrochemical behavior was discussed in terms of their zeta potential, structural, morphology, and textural properties. All examined composites showed high electrocatalytic activity for the oxidation of Cd and Pb to Cd2+ and Pb2+, respectively. The MOF/EB-1 composite (71.0 wt.% MOF-5) gave the highest oxidation currents during both individual and simultaneous detection of two heavy metal ions. Current densities recorded with MOF/EB-1 were also higher than those of its individual components, reflecting the synergistic effect where MOF-5 offers high surface area for two heavy metals adsorption and PANI offers a network for electron transfer during metals’ subsequent oxidation. Limits of detection using MOF/EB-1 electrode for Cd2+ and Pb2+ sensing were found to be as low as 0.077 ppm and 0.033 ppm, respectively. Moreover, the well-defined and intense peaks of Cd oxidation to Cd2+ and somewhat lower peaks of Pb oxidation to Pb2+ were observed at voltammograms obtained for the Danube River as a real sample with no pretreatment, which implies that herein tested MOF-5/PANI electrodes could be used as electrochemical sensors for the detection of heavy metal ions in the real water samples.
dc.publisherMDPI
dc.relationinfo:eu-repo/grantAgreement/ScienceFundRS/Ideje/7750219/RS//
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.sourcePolymers
dc.subjectcomposite
dc.subjectMOF-5
dc.subjectpolyaniline
dc.subjectcadmium ion
dc.subjectelectroanalytical sensing
dc.subjectlead ion
dc.subjectmetal-organic framework
dc.titleElectrochemical Sensing of Cadmium and Lead Ions in Water by MOF-5/PANI Composites
dc.typearticle
dc.rights.licenseBY
dc.citation.volume16
dc.citation.issue5
dc.citation.spage683
dc.identifier.wos001183005800001
dc.identifier.doi10.3390/polym16050683
dc.identifier.pmid38475366
dc.identifier.scopus2-s2.0-85187805487
dc.identifier.fulltexthttp://farfar.pharmacy.bg.ac.rs/bitstream/id/15726/Electrochemical_Sensing_of_pub_2024.pdf
dc.type.versionpublishedVersion


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