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Solid manganese dioxide as heterogeneous oxidant of aniline in the preparation of conducting polyaniline or polyaniline/manganese dioxide composites
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SYSNO ASEP 0552076 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Solid manganese dioxide as heterogeneous oxidant of aniline in the preparation of conducting polyaniline or polyaniline/manganese dioxide composites Tvůrce(i) Sapurina, I. (CZ)
Bubulinca, C. (CZ)
Trchová, M. (CZ)
Prokeš, J. (CZ)
Stejskal, Jaroslav (UMCH-V) RID, ORCID, SAIČíslo článku 128298 Zdroj.dok. Colloids and Surfaces A-Physicochemical and Engineering Aspects. - : Elsevier - ISSN 0927-7757
Roč. 638, 5 April (2022)Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova conducting polymer ; dye adsorption ; polyaniline Vědní obor RIV CD - Makromolekulární chemie Obor OECD Polymer science CEP GA19-04859S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UMCH-V - RVO:61389013 UT WOS 000745961600001 EID SCOPUS 85122970446 DOI 10.1016/j.colsurfa.2022.128298 Anotace Various oxidants used in the preparation of polyaniline are reviewed. Insoluble solid oxidant, manganese dioxide, has been investigated in the heterogeneous synthesis of polyaniline in detail. Aniline was oxidized in acidic aqueous medium at various oxidant-to-monomer mole ratios [MnO2]/[aniline]. At [MnO2]/[aniline] ≤ 1.25, i.e. at and below the stoichiometric composition, only polyaniline was produced, and the solid oxidant was absent in the product due to its reductive dissolution which took place during the reaction. Polyaniline prepared under such conditions did not differ with respect to conductivity from the standard polyaniline obtained with peroxydisulfate oxidant but fused polyaniline nanofibers have been produced instead of a common globular morphology. The composites of polyaniline/manganese dioxide resulted only at [MnO2]/[aniline] >1.25. Spectroscopic methods suggest that the oxidation with excess of manganese dioxide produced polyaniline at higher oxidation state. The presence of manganese dioxide in the products was confirmed by X-ray diffraction and EDAX. The results are important for the understanding of the preparation and properties of polyaniline/manganese dioxide composites that are currently used in supercapacitor electrodes. The present study also illustrates a new potential application, adsorption of organic dyes Reactive Black 5 and methylene blue, as an example of water-pollution treatment. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2023 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0927775722000528?via%3Dihub
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