New Journal of Chemistry, Volume (44), No (46), Year (2020-1) , Pages (20470-20478)

Title : ( P5W30/g-C3N4heterojunction thin film with improved photoelectrochemical performance for solar water splitting )

Authors: Mozhde Yousefi Hasan Abadi , Hossein Eshghi , Mahdi Karimi , Abolghasem Farhadipour ,

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Abstract

New photocatalysts have been synthesized with inorganic clusters of polyoxometalates (POMs) and graphitic carbon nitride (g-C3N4) under hydrothermal conditions. In this research, for the first time, a Preyssler-type polyoxometalate (Na14[NaP5W30O110]·xH2O) with g-C3N4 was applied to design P5W30/g-C3N4, and photoelectrocatalytic water splitting with a g-C3N4/P5W30 photoanode was investigated. All of applied characterization methods verified the preparation of g-C3N4 nanorods and the successful compositing of POMs with g-C3N4. The photoelectrocatalytic results reveal that the photocurrent density of P5W30/g-C3N4 (0.3 : 1), of around 44 μA cm−2, is greater than those of g-C3N4, P5W30/g-C3N4 (0.1 : 1), or P5W30/g-C3N4 (0.5 : 1). The lower slope of the transient open circuit potential decay for P5W30/g-C3N4 (0.3 : 1) in comparison with other photocatalysts demonstrates more efficient separation and lower recombination rate of photo-induced charge carriers. Also, the constant photocurrent density in chronoamperometry analysis confirms a stable photoelectrocatalytic performance during three cycles under light irradiation for all of the prepared photoanodes. Mott–Schottky plots displayed a deeper band bending for P5W30/g-C3N4 (0.3 : 1) compared to that of g-C3N4, implying a greater charge carrier density, which leads to greater electron accumulation on its surface and simplifies electron transfer at the photoelectrode/electrolyte interface.

Keywords

, photocatalysts, inorganic clusters, polyoxometalates (POMs), graphitic carbon nitride (g-C3N4), hydrothermal
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@article{paperid:1082260,
author = {Yousefi Hasan Abadi, Mozhde and Eshghi, Hossein and Karimi, Mahdi and Farhadipour, Abolghasem},
title = {P5W30/g-C3N4heterojunction thin film with improved photoelectrochemical performance for solar water splitting},
journal = {New Journal of Chemistry},
year = {2020},
volume = {44},
number = {46},
month = {January},
issn = {1144-0546},
pages = {20470--20478},
numpages = {8},
keywords = {photocatalysts; inorganic clusters; polyoxometalates (POMs); graphitic carbon nitride (g-C3N4); hydrothermal},
}

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%0 Journal Article
%T P5W30/g-C3N4heterojunction thin film with improved photoelectrochemical performance for solar water splitting
%A Yousefi Hasan Abadi, Mozhde
%A Eshghi, Hossein
%A Karimi, Mahdi
%A Farhadipour, Abolghasem
%J New Journal of Chemistry
%@ 1144-0546
%D 2020

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