Preparation and Photoelectrocatalytic Performance of CQDs Modified Bi<sub>2</sub>MoO<sub>6</sub> Hybrid Electrode

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Abstract In order to improve the visible light absorption and the photogenerated charges migration ability of Bi₂MoO₆ electrode, and to further enhance its catalytic degradation of organics in waste water, the carbon quantum dots were modified on the surface of Bi₂MoO₆ electrode through solvothermal, calcination and adsorption processes and the hybrid electrode was applied to the photoelectrocatalytic system. The effects of CQDs modification and photoelectrocatalytic bias on improving the catalytic performance of Bi₂MoO₆ were explored through various characterizations and tests. The results show that CQDs are evenly dispersed on the surface of Bi₂MoO₆, and the connection between two materials are successfully formed. The CQDs/Bi₂MoO₆ hybrid electrode has stronger capacity of visible light utilization and surface charges migration than the Bi₂MoO₆ monomer electrode. Therefore, the 15-CQDs/Bi₂MoO₆ hybrid electrode shows the highest photoelectrocatalytic degradation rate of 82.7% toward methylene blue within 2 h under visible light, which is greatly enhanced compared to 16.0% for Bi₂MoO₆ electrode. Besides, the hybrid also possesses a better cycle stability.

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	Zhao Chenxiao
	Zhang Zisheng
	Gao Xin
	Li Hong

Keywords： photoelectrocatalytic degradation； Bi₂MoO₆； carbon quantum dots； visible light

Received 2020-06-29;

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Zhao Chenxiao, Zhang Zisheng, Gao Xin, Li Hong.Preparation and Photoelectrocatalytic Performance of CQDs Modified Bi₂MoO₆ Hybrid Electrode[J] Chemcial Industry and Engineering, 2021,V38(3): 1-9

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