Ag2O-钛酸锶钡的制备及内建电场调控可见光催化性能研究  

Ag2O-Preparation of Barium Strontium titanate and Study on Visible Photocatalytic Performance of Built-in Electric Field Regulation

作　　者：刘海波 刘杰 赵夷雯 李雪 吴少雨 刘晓燕 范保艳 Liu Haibo;Liu Jie;Zhao Yiwen;Li Xue;Wu Shaoyu;Liu Xiaoyan;Fan Baoyan(College of Metallurgy and Material Engineering,Chongqing Institute of Science and Technology,Chongqing 401331)

机构地区：[1]重庆科技学院冶金与材料工程学院,重庆401331

出　　处：《云南化工》2020年第7期34-36,共3页Yunnan Chemical Technology

基　　金：重庆市大学生创新训练计划项目(批准号:S201911551009);重庆市教育委员会科学技术研究计划青年项目(批准号:KJQN201901522)。

摘　　要：采用水热法结合共沉淀法制备Ag2O-钛酸锶钡(Ag2O-BST)纳米线复合材料,将罗丹明B作为模拟污染物,研究Ag2O-BST的可见光催化活性。结果表明:水热合成温度影响BST纳米线成分和形貌,温度为85℃时剩余H2Ti3O7模板含量最低,立方体晶粒较少。Ag2O相对含量低的Ag2O-BST在光照后期降解效率较纯Ag2O高14%,Ag2O-BST复合材料中BST自发极化产生的内建电场有助于促进界面处光生电子-空穴对的分离,提升可见光催化性能。Ag2O/barium strontium titanate(Ag2O-BST) nanowire composites were prepared by hydrothermal method and co-precipitation method.Rhodamine B was used as a simulated contaminant to study the visible light catalytic activity of Ag2O-BST nanowires.As a result:the temperature of hydrothermal synthesis affects the composition and morphology of BST nanowires,and the lowest content of residual H2 Ti3 O7 template and cube morphology are obtained at 85 ℃.The degradation efficiency of Ag2O-BST with relatively low Ag2O content is 14% higher than that of pure Ag2O in the late reaction period.The built-in electric field generated by the spontaneous polarization of BST in Ag2O-BST composites helps promote the separation of photogenerated electron-hole pairs at the interface,and thus improves the visible-light photocatalytic performance.

关 键 词：Ag2O-BST复合材料 内建电场 可见光催化 

分 类 号：TQ427.26[化学工程]