Effect of substrate surface defect on the microstructure and photocatalytic activities of TiO2/Bi2WO6 composites

被引：0
作者：
Liu Y. [1 ]
Fang G. [1 ,2 ]
Yan X. [1 ]
Shen H. [1 ]
机构：
[1] School of Materials Science and Engineering, North Minzu University, Yinchuan
[2] Carbon Based Advanced Ceramics Material National Joint Engineering Research Center, North Minzu University, Yinchuan
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2023年 / 40卷 / 05期
关键词：
defect distribution; defect inducing hetero-growth; heterojunction; photocalalytic activity; TiO[!sub]2[!/sub]/Bi[!sub]2[!/sub]WO[!sub]6[!/sub] composite;
D O I：
10.13801/j.cnki.fhclxb.20220628.001
中图分类号：
学科分类号：
摘要：
TiO2/Bi2WO6 heterojunction composite is one of the most promising visible-light derived photocatalysts. Its photocatalytic performance mainly depends on the interface structure and micro-morphology. However, it is a great challenge to control and tailor the micro-morphology and interface structure of TiO2/Bi2WO6 heterojunction. Herein, TiO2/Bi2WO6 heterojunction was synthesized by defect induced hetero-growth method. The influences of the defect size and distribution density, located on TiO2 nanobelts substrate, on the microstructure and photocatalytic activity of the TiO2/Bi2WO6 composites was further investigated. The results indicate that the corroding temperature and retention time are the key to modify the defect size and distribution density on the substrates. The defect size and distribution density are 26 nm and 12 per µm2 respectively, which facilitate to construct TiO2/Bi2WO6 heterojunction composites with well interface structure. With the as-prepared TiO2/Bi2WO6 heterojunction as photocatalyst under visible light, rhodamine B (RhB) and methylene blue (MB) can be completely photodegraded after irradiation for 12 min and 20 min respectively, and the degradation percentage of phenol also is reached 43.8% after 70 min of irradiation. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：2783 / 2793
页数：10
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