摘要
为了探究钨酸铋复合催化剂对污染物的光催化降解能力,以Bi(NO_(3))_(3)·5H_(2)O为铋源,采用溶剂热法制备出g-C_(3)N_(4)/Bi_(2)WO_(6)复合光催化剂。分别利用XRD、SEM、XPS、BET、UV-Vis DRS、FTIR、PL等手段对其进行了一系列表征。以联苯胺为底物,考察光催化剂的光催化性能。实验表明,光催化剂形成的异质结提高了光生电荷载流子分离率,有助于增强光生载流子的利用效率,进而提升降解性能。同时,循环实验表明复合催化剂具有良好的催化活性和稳定性。此外,捕获剂实验显示,超氧自由基(·O^(-)_(2))是光催化反应的主要活性物种。
To probe the photocatalytic degradation of pollutants by bismuth tungstate composite catalyst,g-C_(3)N_(4)/Bi_(2)WO_(6)composites were prepared by a solvothermal method with bismuth nitrate pentahydrate.A series of characterizations were carried out by using XRD,SEM,XPS,BET,UV-Vis DRS,FTIR and PL respectively.The photocatalytic degradation performance of photocatalysts was studied with benzidine as the target pollutant.Results showed thatthe heterojunction formed by the photocatalystwas able toimprove the separation rate of photogenerated charge carriers,which couldhelp to enhance the utilization efficiency of photogenerated charge carriers,then improve the degradation performance.Meanwhile,the cycling experiments showed that the composite catalyst had good catalytic activity and stability.Furthermore,the trapping agent experiments showed that superoxide radical(·O^(-)_(2))wasthe main active species in photocatalytic reactions.
作者
葛建华
卫洲
郑旭阳
李佳
吴为
张万
GE Jianhua;WEI Zhou;ZHENG Xuyang;LI Jia;WU Wei;ZHANG Wan(School ofEarth and Environment,Anhui University of Science&Technology,Huainan Anhui 232001;Institute of Energy,Hefei Comprehensive National Science Center,Hefei Anhui 230031,China)
出处
《安徽理工大学学报（自然科学版）》
CAS
2022年第4期35-44,共10页
Journal of Anhui University of Science and Technology:Natural Science
基金
2020年度高校优秀人才支持计划基金资助项目(gxyq2020012)
安徽省自然科学基金资助项目(1808085ME139)
安徽省高等学校省级自然科学研究基金资助项目(KJ2014A069)。
