Ag/BiVO_(4)&Bi_(4)V_(2)O_(11)复合材料的构筑及其可见光催化性能  

Preparation and visible light catalytic properties of Ag/BiVO_(4)&Bi_(4)V_(2)O_(11) composite

作　　者：杨赟 章福清 史婉儿 杨水金 YANG Yun;ZHANG Fuqing;SHI Waner;YANG Shuijin(College of Chemistry and Environmental Engineering,Hanjiang Normal University,Shiyan 442000,China;College of Chemistry and Chemical Engineering,Hubei Normal University,Huangshi 435002,China)

机构地区：[1]汉江师范学院化学与环境工程学院,湖北十堰442000 [2]湖北师范大学化学化工学院,湖北黄石435002

出　　处：《工业水处理》2023年第10期117-122,共6页Industrial Water Treatment

基　　金：湖北省教育厅科研计划重点项目(D20213102);湖北省教育厅科研计划一般项目(Q20213101);十堰市引导性科研项目(21Y12)。

摘　　要：利用水热法和光辅助还原法构筑具有高光催化活性的Ag/BiVO_(4)&Bi_(4)V_(2)O_(11)复合材料,通过XRD、SEM、BET表征手段对催化剂的形貌和结构进行表征,利用罗丹明B(RhB)的可见光催化降解实验对材料的光催化活性进行评估。结果表明,当Ag负载量(质量分数)为0.76%时,Ag/BiVO_(4)&Bi_(4)V_(2)O_(11)复合材料对5 mg/L的RhB溶液光催化降解80 min时,RhB降解率为92.7%;相比BiVO_(4)/Bi_(4)V_(2)O_(11),Ag沉积后的复合材料对RhB的降解效果提高了85.9%;复合材料Ag/BiVO_(4)&Bi_(4)V_(2)O_(11)光催化降解RhB的过程符合一级动力学反应。Ag/BiVO_(4)/Bi_(4)V_(2)O_(11)复合材料光催化降解RhB活性增强可归因于金属Ag的沉积不仅增加了复合材料的比表面积,且Ag的等离子体(SPR)效应有效抑制了光生电子(e^(-))和空穴(h^(+))的复合。The Ag/BiVO_(4)Bi_(4)V_(2)O_(11) composite material with high photocatalytic activity was prepared by hydrothermal reaction and photo-assisted reduction method.The composite material was characterized by XRD,SEM,BET,and its photocatalytic activity to Rhodamine B(RhB) was evaluated by visible light catalytic degradation experiment.The results showed that when the Ag load(mass fraction) of composite material was 0.76%,the degradation rate of 5 mg/L RhB could reach 92.7%.Compared with BiVO_(4)Bi_(4)V_(2)O_(11),the degradation effect of RhB by the composite material after Ag deposition increased by 85.9%.The photocatalytic degradation of RhB by Ag/BiVO_(4)Bi_(4)V_(2)O_(11) composites was consistent with the first-order kinetic reaction.The enhanced RhB catalytic activity of Ag/BiVO_(4)/Bi_(4)V_(2)O_(11) composite could be attributed to the fact that Ag deposition not only increased the specific surface area of the composite,but also effectively inhibited the recombination of photogenerated electrons(e^(-)) and holes(h^(+)) due to the surface plasmon resonance (SPR) effect of Ag.

关 键 词：光催化 罗丹明B 降解 光还原 等离子体效应 

分 类 号：TQ426.91[化学工程] X703[环境科学与工程—环境工程]