Solid manganese dioxide as heterogeneous oxidant of aniline in the preparation of conducting polyaniline or polyaniline/manganese dioxide composites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F22%3A00552076" target="_blank" >RIV/61389013:_____/22:00552076 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22810/22:43924134 RIV/00216208:11320/22:10454491 RIV/70883521:28610/22:63549698

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0927775722000528?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0927775722000528?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.colsurfa.2022.128298" target="_blank" >10.1016/j.colsurfa.2022.128298</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Solid manganese dioxide as heterogeneous oxidant of aniline in the preparation of conducting polyaniline or polyaniline/manganese dioxide composites

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Solid manganese dioxide as heterogeneous oxidant of aniline in the preparation of conducting polyaniline or polyaniline/manganese dioxide composites

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GA19-04859S" target="_blank" >GA19-04859S: Interakce vodivých polymerů s organickými barvivy: Principy a důsledky</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Colloids and Surfaces A-Physicochemical and Engineering Aspects

ISSN

0927-7757

e-ISSN

1873-4359

Svazek periodika

638

Číslo periodika v rámci svazku

5 April

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

128298

Kód UT WoS článku

000745961600001

EID výsledku v databázi Scopus

2-s2.0-85122970446