International Journal of Hydrogen Energy, ( ISI ), Volume (45), No (1), Year (2020-1) , Pages (123-134)

Title : ( Photoelectrochemical water splitting by engineered multilayer TiO2/GQDs photoanode with cascade charge transfer structure )

Authors: Halimeh Sadat Sajjadizade , Elaheh Kafshdare Goharshadi , Hossein Ahmadzadeh ,

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Abstract

Herein, for the first time, an efficient photoanode engineered with the cascade structure of FTO|c-TiO2|few graphene layers|TiO2/GQDs|Ni(OH)2 assembly (Ni(OH)2 photoanode) is designed. This photoanode exhibited much lower electron–hole recombination, fast charge transport, higher visible light harvesting, and excellent performance with respect to FTO|c-TiO2|TiO2 assembly (TiO2 photoanode) in the photoelectrocatalytic oxygen evolution process. The photocurrent density of Ni(OH)2 photoanode is 7 times (0.35 mA cm−2 at 1.23 V vs. RHE) greater than that of TiO2 photoanode (0.045 mA cm−2 at 1.23 V vs. RHE). The compact TiO2 (c-TiO2) layer in Ni(OH)2 photoanode plays a role of an effective hole-blocking layer. Few-layer graphene layer could speed up the transport of the photogenerated electrons from the conduction band of the TiO2/GQDs to FTO. Ni(OH)2 layer could transfer rapidly holes into electrolyte solution.

Keywords

, Photoelectrochemical water splitting TiO2/GQDs nanocomposite Photoanode Cascade charge transfer structure Few, layer graphene nanosheets
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@article{paperid:1077701,
author = {Sajjadizade, Halimeh Sadat and Kafshdare Goharshadi, Elaheh and Ahmadzadeh, Hossein},
title = {Photoelectrochemical water splitting by engineered multilayer TiO2/GQDs photoanode with cascade charge transfer structure},
journal = {International Journal of Hydrogen Energy},
year = {2020},
volume = {45},
number = {1},
month = {January},
issn = {0360-3199},
pages = {123--134},
numpages = {11},
keywords = {Photoelectrochemical water splitting TiO2/GQDs nanocomposite Photoanode Cascade charge transfer structure Few-layer graphene nanosheets},
}

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%0 Journal Article
%T Photoelectrochemical water splitting by engineered multilayer TiO2/GQDs photoanode with cascade charge transfer structure
%A Sajjadizade, Halimeh Sadat
%A Kafshdare Goharshadi, Elaheh
%A Ahmadzadeh, Hossein
%J International Journal of Hydrogen Energy
%@ 0360-3199
%D 2020

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