Microcomposites of zirconium phosphonates with a conducting polymer, polyaniline: preparation, spectroscopic study and humidity sensing

0504781 - ÚMCH 2020 RIV US eng J - Článek v odborném periodiku
Melánová, Klára - Beneš, L. - Zima, Vítězslav - Trchová, Miroslava - Stejskal, Jaroslav
Microcomposites of zirconium phosphonates with a conducting polymer, polyaniline: preparation, spectroscopic study and humidity sensing.
Journal of Solid State Chemistry. Roč. 276, August (2019), s. 285-293. ISSN 0022-4596. E-ISSN 1095-726X
Grant CEP: GA ČR(CZ) GA17-10639S
Institucionální podpora: RVO:61389013
Klíčová slova: polyaniline * composites * phosphonates
Obor OECD: Inorganic and nuclear chemistry
Impakt faktor: 2.726, rok: 2019
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S0022459619302488?via%3Dihub

The microcomposites of a conducting polymer, polyaniline, with four layered zirconium phosphonates, viz. 4-sulfophenylphosphonate, 2-sulfoethylphosphonate, 4-carboxyphenylphosphonate, carboxymethylphosphonate, were prepared and characterized by wide-angle X-ray diffraction and FTIR and Raman spectroscopies. Aniline hydrochloride was proved to intercalate the hosts containing sulfonic group. The intercalation was not observed with the carboxyl-containing phosphonates. Two methods of aniline oxidation, using peroxydisulfate anion, cerium(IV) or iron(III) cations as aniline oxidants, were tested. FTIR and Raman spectra suggest that the intercalated aniline does not polymerize. Polyaniline grows on phosphonates during surface polymerization rather than to be generated as a free polymer in the bulk of reaction mixture. Conductivity varied from 10−9 S cm−1 to 10−3 S cm−1 depending on the way of preparation and the type of the phosphonate filler. The conductivity response to the ambient humidity strongly depends on the filler and suggests the possibility to apply these materials in humidity sensors.
Trvalý link: http://hdl.handle.net/11104/0296621