BiVO4/TiO2广谱光催化剂的合成及光催化性能  

Synthesis of Broad-spectrum Photocatalyst BiVO4/TiO2 and Its Photocatalytic Property

作　　者：王美 李文军[2] Wang Mei;Li Wenjun(Huaibei Normal University,Huaibei 235000,China;University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]淮北师范大学信息学院,安徽淮北235000 [2]北京科技大学化学与生物工程学院,北京100083

出　　处：《廊坊师范学院学报（自然科学版）》2020年第3期41-46,共6页Journal of Langfang Normal University(Natural Science Edition)

基　　金：安徽省教学研究一般项目(2019szjy174)。

摘　　要：用低温溶胶-凝胶法,合成了BiVO4/TiO2系列复合光催化剂。采用X射线衍射、比表面积、紫外-可见漫反射光谱和荧光发射光谱对样品进行表征,用模拟太阳光降解亚甲基蓝评价复合光催化剂的催化活性。结果表明:复合光催化剂在480-800nm的可见光范围具有较强的吸收峰,当BiVO4的质量分数为30%时,呈现出最好的光谱吸收性能;BiVO4与TiO2之间形成的异质结,能快速捕获并迁移电子,有效地提高光生电子-空穴的分离效率,从而提高其光催化活性。BiVO4/TiO2 series composite photocatalysts were synthesized by low temperature sol-gel method.The samples were characterized by X-ray diffraction,scanning electron microscope,specific surface area,UV-Vis techniques and photoluminescence spectra.The photocatalytic activity was evaluated by degradation of methylene blue under simulated sunlight irradiation.It was found that the composite photocatalysts have a strong absorption peak in the 480-800 nm range of visible light.When the mass fraction of BiVO4 was 30%,it showed the best spectral absorption performance.The formation of heterojunction between BiVO4 and TiO2 can capture and transfer the photogenerated charges,leading to an efficient improvement in photocatalytic activity.

关 键 词：BiVO4/TiO2 广谱 溶胶-凝胶法 光催化 

分 类 号：O643[理学—物理化学]