BiVO_(4)/Bi_(2)S_(3)复合材料的制备及其对四环素的光电催化降解  

Fabrication of BiVO_(4)/Bi_(2)S_(3) Composites for Photoelectrochemical Degradation of Tetracycline

作　　者：王慧芳 王洋洋 周楠 金成龙 董玉林 段俊新 刘鹏 陈连喜 李曦 WANG Huifang;WANG Yangyang;ZHOU Nan;JIN Chenglong;DONG Yulin;DUAN Junxin;LIU Peng;CHEN Lianxi;LI Xi(College of Chemical,Chemical Engineering and Life Sciences,Wuhan University of Technology,Wuhan 430070,Hubei,China)

机构地区：[1]武汉理工大学化学化工与生命科学学院,湖北武汉430070

出　　处：《武汉大学学报（理学版）》2022年第2期155-162,共8页Journal of Wuhan University:Natural Science Edition

基　　金：中央高校基本科研业务费专项资金(2020-IB-026,2020-IB-028)。

摘　　要：采用电沉积-热处理法制备多孔BiVO_(4)电极,再与Na_(2)S复合,采用水热法制备BiVO_(4)/Bi_(2)S_(3)电极,并对其光电催化降解四环素(TC)的性能进行了研究。结果表明,Bi2S3的加入增强了材料对可见光的吸收,加速了光生载流子的分离,从而提升了BiVO_(4)/Bi_(2)S_(3)的光电性能。当外加电势为0.6 V(vs.SCE)时,光照100 min后,BiVO_(4)/Bi_(2)S_(3)电极对TC的降解率达到82.4%,表现出良好的光电催化活性。自由基捕获实验结果表明,在BiVO_(4)/Bi_(2)S_(3)光电催化降解TC过程中,空穴(h^(+))和羟基自由基(·OH)是主要的活性自由基。此外,BiVO_(4)/Bi_(2)S_(3)电极还具备良好的稳定性。The porous BiVO_(4) electrode was obtained via an electrodeposition-pyrolysis method,and then composited with Na_(2)S to synthesize BiVO_(4)/Bi_(2)S_(3) electrode by hydrothermal method.The photoelectrochemical catalytic performance of BiVO_(4)/Bi_(2)S_(3) for the degradation of tetracycline(TC)was also studied.The results showed that the incorporation of Bi2S3 could enhance the absorption of visible light and accelerate the separation of photo-generated carriers,which improved the photoelectrochemical performance of BiVO_(4)/Bi_(2)S_(3).After visible light irradiation for 100 minutes,the degradation efficiency of TC reached 82.4%when the potential was 0.6 V(vs.SCE),indicating a high photoelectrochemical activity of BiVO_(4)/Bi_(2)S_(3).The trapping experiments confirmed that the holes(h^(+))and hydroxyl radicals(·OH)were the main active species during the photoelectrochemical process.Moreover,the BiVO_(4)/Bi_(2)S_(3) electrode also showed a good stability.

关 键 词：四环素 光电催化降解 钒酸铋 硫化铋 

分 类 号：X703.[环境科学与工程—环境工程]