Efficient non-metal based conducting polymers for photocatalytic hydrogen production: comparative study between polyaniline, polypyrrole and PEDOT

Incorporation of conducting polymers (CPs) with TiO 2 is considered a promising pathway toward the fabrication of highly efficient non-metal based photocatalysts. Herein, we report the fabrication of TiO 2 @polyaniline, TiO 2 @polypyrrole, and TiO 2 @poly(3,4-ethylenedioxythiophene) photocatalyst he...

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Veröffentlicht in:RSC advances 2021-04, Vol.11 (22), p.13229-13244
Hauptverfasser: El-Bery, Haitham M, Salah, Mahmoud R, Ahmed, Seddique M, Soliman, Soliman A
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creator El-Bery, Haitham M
Salah, Mahmoud R
Ahmed, Seddique M
Soliman, Soliman A
description Incorporation of conducting polymers (CPs) with TiO 2 is considered a promising pathway toward the fabrication of highly efficient non-metal based photocatalysts. Herein, we report the fabrication of TiO 2 @polyaniline, TiO 2 @polypyrrole, and TiO 2 @poly(3,4-ethylenedioxythiophene) photocatalyst heterostructures via the facile wet incipient impregnation method. The mass ratios of CPs in the composites were optimized. The structure, morphology, optical and surface texture of the samples were characterized by XRD, TEM, TGA, DRS, and N 2 -physisorption techniques. The TiO 2 @2PEDOT, TiO 2 @2PPy, and TiO 2 @5PAn composites were found to exhibit the highest H 2 evolution rate (HER) of 1.37, 2.09, and 3.1 mmol h −1 g −1 , respectively. Compared to bare TiO 2 , the HER was significantly enhanced by 16, 24, and 36-fold, respectively. Photoelectrochemical measurements (CV, CA and EIS) were conducted, to evaluate the photoelectric properties of the synthesized composites and assist in understanding the photocatalytic mechanism. The deposition method plays a key-role in forming the photocatalyst/CP interface. This simple impregnation route was found to provide an excellent interface for charge transfer between composite components compared to chemisorption and in situ polymerization methods. This study sheds light on the promising effect of CP incorporation with semiconductor photocatalysts, as a cheap and efficient matrix, on photocatalytic performance. Incorporation of conducting polymers (CPs) with TiO 2 is considered a promising pathway toward the fabrication of highly efficient non-metal based photocatalysts.
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subjects Charge transfer
Chemisorption
Chemistry
Comparative studies
Composite materials
Conducting polymers
Heterostructures
Hydrogen evolution
Hydrogen production
Impregnation
Mass ratios
Morphology
Photocatalysis
Photocatalysts
Photoelectric effect
Photoelectricity
Polyanilines
Polypyrroles
Surface layers
Titanium dioxide
title Efficient non-metal based conducting polymers for photocatalytic hydrogen production: comparative study between polyaniline, polypyrrole and PEDOT
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