ZnO/CuInS2 core/shell heterojunction nanoarray for photoelectrochemical water splitting

ZnO/CuInS2 core/shell nanorods array thin film was synthesized on conducting glass substrates for photoelectrochemical water splitting via a simple hydrothermal and cation exchange reaction, using ZnO nanorods array as reactive template. Uniform CuInS2 films were obtained on the surface of ZnO nanor...

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Bibliographic Details
Published in:International journal of hydrogen energy 2012-10, Vol.37 (20), p.15029-15037
Main Authors: Li, Yabin, Liu, Zhifeng, Wang, Yun, Liu, Zhichao, Han, Jianhua, Ya, Jing
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Core/shell
CuInS2
Energy
Exact sciences and technology
Fuels
Heterojunction
Hydrogen
Water splitting
ZnO
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Summary:ZnO/CuInS2 core/shell nanorods array thin film was synthesized on conducting glass substrates for photoelectrochemical water splitting via a simple hydrothermal and cation exchange reaction, using ZnO nanorods array as reactive template. Uniform CuInS2 films were obtained on the surface of ZnO nanorods, based on the ion-by-ion growth mechanism. The optical property of core/shell nanoarray was characterized, and enhanced absorption spectrum was observed. Hydrogen generation efficiency of 3.2% at 0.29 V versus saturated calomel electrode was achieved with synthesized ZnO/CuInS2 core/shell nanoarray electrode due to the improved absorption and appropriate energy gap structure. The synthesized core/shell nanoarray has potential application in photoelectrochemical water splitting. ► Uniform CuInS2 layer was synthesized on surface of ZnO naonrods via facile route. ► The expected products can be used for photoelectrochemical water splitting. ► High photocurrent was obtained due to the absorption spectra and band structure.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2012.07.117