Citation: Zhen Qin, Wenjian Fang, Junying Liu, Zhidong Wei, Zhi Jiang, Wenfeng Shangguan. Zinc-doped g-C₃N₄/BiVO₄ as a Z-scheme photocatalyst system for water splitting under visible light[J]. Chinese Journal of Catalysis, ;2018, 39(3): 472-478. doi: 10.1016/S1872-2067(17)62961-9 shu

Zinc-doped g-C₃N₄/BiVO₄ as a Z-scheme photocatalyst system for water splitting under visible light

Research Center for Combustion and Environmental Technology, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received Date: 28 September 2017
Revised Date: 29 October 2017

Fund Project: This work was supported by the National Natural Science Foundation of China (21773153).

A two-step photocatalytic water splitting system, termed a "Z-scheme system", was achieved using Zn-doped g-C₃N₄ for H₂ evolution and BiVO₄ for O₂ evolution with Fe²⁺/Fe³⁺ as a shuttle redox mediator. H₂ and O₂ were evaluated simultaneously when the doping amount of zinc was 10%. Moreover, Zn-doped (10%) g-C₃N₄ synthesized by an impregnation method showed superior active ability to form the Z-scheme with BiVO₄ than by in-situ synthesis. X-ray diffraction, UV-Vis spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy were used to characterize the samples. It was determined that more Zn-N bonds could be formed on the surface of g-C₃N₄ by impregnation, which could facilitate charge transfer.
- g-C₃N₄,
- BiVO₄,
- Z-scheme,
- Shuttle redox mediator,
- Water splitting
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Zinc-doped g-C₃N₄/BiVO₄ as a Z-scheme photocatalyst system for water splitting under visible light