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.
作者
王美
李文军
Wang Mei;Li Wenjun(Huaibei Normal University,Huaibei 235000,China;University of Science and Technology Beijing,Beijing 100083,China)
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)。
