Enhanced visible light absorption of Bi2WO6/SiO2 with abundant adsorbed oxygen for the degradation of organic pollutant
作者机构：School of Material Science and EngineeringShaanxi University of Science and TechnologyXi'an 710021China
出 版 物：《Particuology》 (颗粒学报（英文版）)
年 卷 期：2024年第88卷第5期
页 面：210-217页
核心收录：
学科分类：07[理学] 070304[理学-物理化学(含∶化学物理)] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学]
基 金：supported by the National Natural Science Foundation of China(grant No.52173214) the Youth Innovation Team of Shaanxi Universities(grant No.2022-70).
主 题：Bi2WO6 SiO2 inverse-opal structure Photocatalysis Adsorbed oxygen
摘 要：Heterogeneous photocatalysts exhibit high catalytic efficiency in the degradation of pollutants,but their stability and repeatability is not very good and requires high structural matching.Simply by nanosizing the pure Bi 2 WO6(BWO)photocatalyst without constructing a heterojunction,there is a significant improvement in its performance,with an enhancement effect of about 2.3 times(99.43%).The high photocatalytic degradation efficiency of the material can be attributed to the enhanced light absorption effect brought by the three-dimensional inverse-opal structure SiO 2(IS)and the abundant surface adsorbed oxygen generated after the formation of Si–O–W bonds.In addition,the introduction of IS greatly increases the surface area of nanostructured BWO,which accelerates the charge transfer process,while the adsorbed oxygen promotes the participation of·O2−in the photocatalytic reaction,thereby accelerating the consumption of photo-generated electrons and ultimately improving the separation of charge carriers.Furthermore,the matched photonic bandgap further improves the absorption and utilization of light of the material.In this work,we constructs Si–O–W bonds to obtain inverse-opal SiO2/Bi2 WO6 with uniformly growth of pure phase nano BWO,which provides a feasible strategy for the preparation of high-performance pure-phase photocatalysts.
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