摘要
以钛酸丁酯、五水硝酸铋、偏钒酸铵为主要原料制备TiO2-BiVO4复合光催化剂,并用X射线衍射仪、扫描电镜、紫外-可见分光光度计、X射线光电子能谱仪和光致发光荧光光谱仪进行表征。结果表明,与TiO2和BiVO4相比,TiO2-BiVO4复合光催化剂具有更窄的禁带宽度,光生电子-空穴的复合概率更低。TiO2-BiVO4复合光催化剂具有更高的光催化活性,60 min后对罗丹明B溶液的降解率达到87.3%。TiO2-BiVO4复合光催化剂具有良好的光催化稳定性,经过5次光催化降解实验后,对罗丹明B溶液的降解率为81.7%。
TiO2-BiVO4 composite photo-catalyst was prepared by butyl titanate,bismuth nitrate pentahy⁃drate and ammonium vanadate,and characterized by XRD,SEM,UV-Vis,XPS and PL.The results indicated that TiO2-BiVO4 composite photo-catalyst had more narrow band gap and lower recombination rate of elec⁃trons and holes compared to TiO2 and BiVO4.TiO2-BiVO4 composite photo-catalyst had higher photocatalytic activity,the degradation rate of rhodamine B was 87.3%after 60 min.TiO2-BiVO4 composite photo-catalyst had good stability,and the degradation rate was 81.7%even after 5 times photocatalytic tests.
作者
杨知勋
YANG Zhixun(Hebei Institute of Environmental Engineering,Qinhuangdao 066102,China)
出处
《印染助剂》
CAS
北大核心
2019年第12期29-32,共4页
Textile Auxiliaries
关键词
复合材料
光催化
光生电子-空穴
异质结
composite material
photocatalytic
photo induced electron-hole
heterojunction
