Citation: Zetian He, Sen Liu, Yi Zhong, Daimei Chen, Hao Ding, Jiao Wang, Gaoxiang Du, Guang Yang, Qiang Hao. Preparation of BiPO₄/graphene photoelectrode and its photoelectrocatalyitic performance[J]. Chinese Journal of Catalysis, ;2020, 41(2): 302-311. doi: S1872-2067(19)63520-5 shu

Preparation of BiPO₄/graphene photoelectrode and its photoelectrocatalyitic performance

Zetian He ^a, ,
Sen Liu ^a ,
Yi Zhong ^a ,
Daimei Chen ^a ,
Hao Ding ^a ,
Jiao Wang ^b ,
Gaoxiang Du ^a ,
Guang Yang ^a ,
Qiang Hao ^c

a Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;
b Beijing Polytechnic College, Beijing 100042, China;
c Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney 2007, Australia

Received Date: 29 September 2019
Revised Date: 9 October 2019

Fund Project: This work was partly supported by the National Natural Science Foundations of China (21577132, 21978276), the Fundamental Research Funds for the Central Universities (2652018326, 2652018298, 2652018297), and the Beijing Municipal Education Commission Key Science and Technology Project Fund (KZ201910853043).

In this work, a two-step electrodeposition method was employed to prepare BiPO₄ nanorod/reduced graphene oxide/FTO composite electrodes (BiPO₄/rGO/FTO). The BiPO₄/rGO/FTO composite electrode showed the higher photoelectrocatalytic (PEC) activity for the removal of methyl orange than pure BiPO₄, which was 2.8 times higher than that of BiPO₄/FTO electrode. The effects of working voltage and BiPO₄ deposition time on the degradation efficiency of methyl orange were investigated. The optimum BiPO₄ deposition time was 45 min and the optimum working voltage was 1.2 V. The trapping experiments showed that hydroxyl radicals (^·OH) and superoxide radicals (^·O₂^-) were the major reactive species in PEC degradation process. The BiPO₄/rGO/FTO composite electrode showed the high stability and its methyl orange removal efficiency remained unchanged after four testing cycles. The reasons for the enhanced PEC efficiency of the BiPO₄/rGO/FTO composite electrode was ascribed to the broad visible-light absorption range, the rapid transmission of photogenerated charges, and the mixed BiPO₄ phase by the introduction of rGO in the composite electrode films.
- Reduced graphene oxide,
- BiPO₄,
- Fluorine-doped tin oxide,
- Electrodeposition,
- Photoelectrocatalysis,
- Methyl orange
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Preparation of BiPO₄/graphene photoelectrode and its photoelectrocatalyitic performance