Z型异质结PbWO_(4)/CdS的构建及光催化性能  

Construction and photocatalytic performance of Z-type heterojunction PbWO_(4)/CdS

作　　者：万玉山[1] 王安慰 邵敏[1] 徐成栋 胡浩[1] WAN Yushan;WANG Anwei;SHAO Min;XU Chengdong;HU Hao(School of Environmental Science and Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学环境科学与工程学院,江苏常州213164

出　　处：《常州大学学报（自然科学版）》2023年第1期18-27,共10页Journal of Changzhou University：Natural Science Edition

基　　金：江苏省研究生实践创新资助项目(SJCX20_0938)。

摘　　要：通过水/溶剂热法和机械搅拌法制备了PbWO_(4)/CdS复合光催化剂。利用XRD,Raman分析材料的结构特征,SEM和TEM分析其微观结构,UV-Vis DRS和PL分析其光学特性,通过光电化学测试进一步研究其光生电荷的分离能力。以孔雀石绿(MG)为目标模拟污染物,对不同光催化剂进行可见光光催化降解测试。结果表明,PbWO_(4)/CdS的光电流响应值约是单体CdS的8倍,提高了光生电子的转移和分离效率,光催化性能得到显著增强,在80 min内对MG的降解效率和去除效率分别为96.3%和72.8%,5次光循环实验中降解效率仍能达到90%,具有较强的光稳定性。The PbWO_(4)/CdS composite photocatalyst was prepared by water/solvothermal method and mechanical stirring method.XRD and Raman were used to analyze the structural characteristics of the material,SEM and TEM were used to analyze its microstructure,UV-Vis DRS and PL were used to analyze its optical properties,and photoelectrochemical measurements were used to analyze the capability of photo-generated charges interface separation.Taking malachite green(MG)as the target to simulate the pollutants,the visible light photocatalytic degradation test was performed on different photocatalysts.The results showed that the photocurrent response value of PbWO_(4)/CdS was about 8 times that of monomer CdS,which improved the transfer and separation efficiency of photo-generated electrons,and thus the photocatalytic performance of PbWO_(4)/CdS had been significantly enhanced.The degradation efficiency and removal efficiency of MG within 80minutes were 96.3%and 72.8%,respectively.The degradation efficiency could still reach 90%in the 5light cycle experiments,indicating the strong light stability.

关 键 词：光催化 硫化镉 复合材料 Z型异质结构 孔雀石绿 降解 太阳能 

分 类 号：X703[环境科学与工程—环境工程]