碳量子点修饰Bi<sub>2</sub>MoO<sub>6</sub>复合电极的制备及光电催化性能研究

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摘要为改善Bi₂MoO₆电极的光吸收与表面光生载流子的迁移能力，提升其在可见光下对水体中有机物的催化降解性能，通过溶剂热、煅烧与吸附过程对Bi₂MoO₆电极进行了表面碳量子点修饰，并将其应用于光电催化系统中，通过多种物理表征与实验测试探究了CQDs修饰与光电催化偏压对改善Bi₂MoO₆催化性能的影响。结果显示，CQDs均匀分散在Bi₂MoO₆表面，2者复合作用良好，CQDs/Bi₂MoO₆复合电极具有更强的可见光利用能力与表面载流子迁移能力，其中实验制得的15-CQDs/Bi₂MoO₆电极具有最高的催化降解活性，在可见光下2 h内对亚甲基蓝的降解率最高可达82.7%，相比于Bi₂MoO₆单体电极16.0%的降解率有了明显的提升，且具有较好的循环稳定性。

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	赵晨骁
	张自生
	高鑫
	李洪

关键词：光电催化降解； Bi₂MoO₆；碳量子点；可见光

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.

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

Received 2020-06-29;

Fund:国家自然科学基金（21476161）。

Corresponding Authors: 李洪,E-mail:lihong.tju@163.com。 Email: lihong.tju@163.com

About author: 赵晨骁(1995-),男,硕士研究生,现从事光电催化方面的研究。

引用本文:

赵晨骁, 张自生, 高鑫, 李洪.碳量子点修饰Bi₂MoO₆复合电极的制备及光电催化性能研究[J]. 化学工业与工程, 2021,38(3): 1-9

Zhao Chenxiao, Zhang Zisheng, Gao Xin, Li Hong.Preparation and Photoelectrocatalytic Performance of CQDs Modified Bi₂MoO₆ Hybrid Electrode[J]. Chemcial Industry and Engineering, 2021,38(3): 1-9

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