BiOCl/ZnO复合光催化剂的制备及其光催化性能  

Preparation of BiOCl/ZnO composite photocatalyst and its photocatalytic performance

作　　者：牛凤兴[1] 蒋帅 高晓明[1] 张雪梅[1] NIU Fengxing;JIANG Shuai;GAO Xiaoming;ZHANG Xuemei(Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering,Yan'an University, Yan'an 716000, China)

机构地区：[1]延安大学化学与化工学院,陕西省化学反应工程重点实验室,陕西延安716000

出　　处：《功能材料》2021年第6期6190-6194,6207,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21766039);陕西省教育厅重点实验室资助项目(17JS140)。

摘　　要：以Zn(NO_(3))_(2)·6H_(2)O,NaOH和KCl以及一定量的Bi(NO_(3))_(3)·5H_(2)O为起始原料,采用水热法制备不同比例的BiOCl/ZnO复合光催化剂。采用X射线粉末衍射(XRD)、X射线光电子能谱(XPS)、扫描电镜(SEM)、能谱(EDS)、紫外可见漫反射光谱(UV-Vis DRS)等测试手段对BiOCl/ZnO进行表征。结果表明,BiOCl/ZnO比纯BiOCl的吸收强度和吸收范围增大,BiOCl与ZnO的协同催化作用,促进了光生电子/空穴的分离和迁移。以邻苯二酚为研究对象,考察BiOCl/ZnO光催化剂的光催化性能。结果表明,1∶1BiOCl/ZnO复合催化剂显示出最佳的催化活性,在400金卤灯光照反应120 min后使10 g/L邻苯二酚降解率达到95.7%,速率常数分别是纯ZnO和纯BiOCl的6.09和4.19倍,且稳定性良好,重复使用4次后降解率仍在90.0%以上。A series of BiOCl/ZnO composite photocatalysts are obtained by hydrothermal method with Zn(NO_(3))_(2)·6H_(2)O,NaOH,KCl and Bi(NO_(3))_(3)·5H_(2)O as raw materials.The structures of BiOCl/ZnO are characterized by X-ray diffraction(XRD),X-ray photoelectron spectrum(XPS),scanning electron microscopy(SEM),energy disperse X-ray spectroscopy(EDS)and UV-Vis diffuse reflectance spectrometry(UV-Vis DRS).The results show that BiOCl/ZnO has higher absorption intensity and range than pure BiOCl,and the synergistic catalysis between BiOCl and ZnO promotes the separation and migration of photogenerated electrons/holes.The photocatalytic performance of BiOCl/ZnO photocatalysts are investigated with catechol as the research object.The results show that the 1∶1 BiOCl/ZnO composite catalyst shows the best catalytic activity,and the degradation rate of 10 mg/L pyroechol reaches 95.7%after 120 min reaction under 400 W metal halide light.The rate constants of BiOCl/ZnO are 6.09 and 4.19 times that of pure ZnO and pure BiOCl,and the stability is good.The degradation rate is still above 90.0%after repeated use for 4 times.

关 键 词：BiOCl/ZnO 邻苯二酚 光催化 

分 类 号：TQ032.4[化学工程]