BiVO_(4)/g-C_(3)N_(4)复合物光催化降解罗丹明B的性能研究  

Photocatalyticdegradation of rhodamine B by BiVO_(4)/g-C_(3)N_(4)composites

作　　者：杨静静 何勇平 蒋文明 彭媛 易莎 杨兵 YANG Jing-jing;HE Yong-ping;JIANG Wen-ming;PENG Yuan;YI Sha;YANG Bing(Environment and Quality Test Department,Chongqing Chemical Industry Vocational College,Chongqing 401228,China;Chongqing Petroleum Co.,Ltd.,China National Aviation Fuel,Chongqing 401120,China;College of Materials Science and Engineering,Yangtze Normal University,Chongqing 408100,China)

机构地区：[1]重庆化工职业学院环境与质量检测学院,重庆401228 [2]中国航油集团重庆石油有限公司,重庆401120 [3]长江师范学院材料科学与工程学院,重庆408100

出　　处：《化学研究与应用》2023年第9期2053-2062,共10页Chemical Research and Application

基　　金：重庆市教委重点科研项目(KJZD-K201804501)资助。

摘　　要：通过绿色合成法在制备BiV04的过程中加入不同量的g-C3N4纳米片而合成BiVO4/g-C3N4复合物,采用XRD、SEM、PL、DRS、HRTEM等对复合物的结构及形貌进行了表征。以不同初始浓度的RhB溶液为模拟污染物,考察了不同复合物在不同光催化条件下的光催化性能。研究发现:BiVO4与C3N4复合比为3:5时,光催化降解RhB效果最佳。RhB初始浓度为20 mg/L时,复合物Bi-C(3:5)的光催化降解能力得到了最大程度的发挥,可见光照射60 min,其降解速率常数比纯BiVO4时提高了50%,比纯g-C3N4时提高了330%,且重复使用效果良好。分析表明Bi-C(3:5)具有更好的光吸收性能和电荷分离能力,有利于促进RhB的光催化降解。BiVO_(4)/g-C_(3)N_(4)composites were synthesized by adding different dosage of g-C_(3)N_(4)nanosheet prepared by ultrasonication-as-sisted liquid exfoliation in the process of preparing BivO_(4)by green synthesis.The structure and morphology of the composites were characterized by XRD,SEM,PL,DRS,HRTEM.The photocatalytic behavior of the composites was investigated by using RhB solu-tion.It was found that the photocatalytic degradation efficiency was highest when the composite mass ratio of BivO_(4)to C_(3)N_(4)was 3:5.When the initial concentration of RhB was 20 mg·L^(-1),the photocatalytic the degradation rate constant of composite Bi-C(3:5)was 50%higher than that of pure BiVO_(4)and 330%higher than that of pure g-C_(3)N_(4)under visible light irradiation for 60 min.It shows that Bi-C(3:5)has better light absorption performance and charge separation capability by analysis.

关 键 词：钒酸铋 氮化碳 光催化降解 罗丹明B 

分 类 号：O614.5[理学—无机化学]