BaTiO_(3)/Ag/AgCl复合光催化剂的制备及其光催化性能研究  

Preparation and performance of BaTiO_(3)/Ag/AgCl composite photocatalyst

作　　者：苏肖彦 樊国栋[1,2] 潘谦宏 李楠 张晗[1,2] Su Xiaoyan;Fan Guodong;Pan Qianhong;Li Nan;Zhang Han(Key Laboratory of Auxiliary Chemiscry&Technology for Chemical Industry,Ministry of Education,Shaanxi University of Science&Technology,Xi'an 710021;College of Chemistry and Chemical Engineering,Shannxi University of Science&Technology,Xi'an 710021;Xi'an Changqing Chemical Group Co.,Ltd.,Xi'an 710018)

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,西安710021 [2]陕西科技大学化学与化工学院,西安710021 [3]西安长庆化工集团有限公司,西安710018

出　　处：《化工新型材料》2021年第12期204-209,共6页New Chemical Materials

基　　金：陕西省科技厅科技攻关计划项目(016GY-142);教育部轻化工助剂化学与技术重点实验室开放基金项目(KFKT2019-11)。

摘　　要：采用光还原法将AgCl中的Ag^(+)还原为Ag^(0),同时将其负载于钛酸盐BaTiO_(3)的表面,制备了具有高催化性能的三元复合型光催化剂BaTiO_(3)/Ag/AgCl。利用X射线衍射(XRD)、场发射扫描电子显微镜(FE-SEM)、X光电子能谱(XPS)、紫外-可见漫反射光谱和荧光光谱等手段对复合光催化剂的物相结构和形貌、元素价态、光学性能等进行了表征,通过在可见光下降解罗丹明B(Rh B)溶液,对复合光催化剂的性能进行了探究。结果表明:以AgNO_(3)为银源,HCl为沉淀剂,得到AgCl并将其负载到BaTiO_(3)表面,当n(AgNO_(3))∶n(BaTiO_(3))=20∶100,光还原时间为30min时,所得到的20%BaTiO_(3)/Ag/AgCl复合光催化剂光催化性能最佳,在可见光照射75min后,对Rh B的降解率达到98.1%,捕获剂实验表明O_(2)^(-)为主要活性物种。The photoreduction method was used to reduce Ag^(+)in AgCl to Ag^(0),and at the same time, it was successfully loaded on the surface of titanate BaTiO_(3)to prepare BaTiO_(3)/Ag/AgCl ternary composite photocatalyst with high performance.Using X-ray diffraction(XRD),field emission scanning electron microscope(FE-SEM),X-ray electron spectroscopy(XPS),ultraviolet-visible diffuse reflectance spectroscopy and fluorescence spectroscopy, the phase structure, morphology, valence state of element and optical properties of the photocatalyst were characterized.The performance of the photocatalyst was explored by degrading rhodamine B(Rh B) solution under visible light.The results shown that AgNO_(3)was used as the silver source and HCl as the precipitant to obtain AgCl, and load it on the surface of BaTiO_(3).When n(AgNO_(3))∶n(BaTiO_(3))=20∶100 and the photoreduction time was 30 min, the obtained 20% BaTiO_(3)/Ag/AgCl had the best performance.After 75 min of visible light irradiation, the degradation rate of Rh B reached 98.1%.The capture agent experiment shown that O_(2)^(-) was the main active species.

关 键 词：钛酸钡 氯化银 光催化 银基半导体 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学] O644.1[理学—化学]