WO_3/Cd_2SnO_4的制备及其光催化分解水析氧活性  

Preparation of WO_3/Cd_2SnO_4 and Its Photocatalytic Activity of Water-splitting for Oxygen Evolution

作　　者：赵学国[1] 黄祖志[1] 李小红[1] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院,江西景德镇333001

出　　处：《硅酸盐学报》2015年第1期116-120,共5页Journal of The Chinese Ceramic Society

基　　金：景德镇陶瓷学院博士启动项目

摘　　要：采用固相反应法合成出尖晶石结构的Cd2Sn O4,进而在Cd2Sn O4粉体颗粒表面附着WO3,制成WO3/Cd2Sn O4异质结光催化剂。借助X射线衍射仪、扫描电子显微镜、紫外-可见分光光度计等对催化剂粉体进行了表征。在可见光模拟系统中以碘酸钾为电子捕获剂检测氧气生成速率,表征催化剂的光催化性能。结果表明:WO3附着在Cd2Sn O4颗粒表面有利于光生电子的转移和光解水析氧反应。WO3/Cd2Sn O4催化剂较之纯Cd2Sn O4催化剂活性显著提高。当WO3附着量为2.3%(质量分数)时,2.3%WO3/Cd2Sn O4光解水析氧速率可稳定在200μmol/(g·h)。Cd2SnO4 powder with a spinel structure was synthesized by a solid-state method. WO3 nanoparticles as heterogeneous nanoparticles were loaded onto Cd2 Sn O4 particle surface to form WO3/Cd2SnO4 heterojunction photocatalyst. The WO3/Cd2SnO4 photocatalyst was characterized by X-ray diffraction, scanning electron microscopy and ultraviolet-visible spectrophotometry, respectively. The photocatalytic activity of the WO3/Cd2SnO4 heterojunction was performed via the O2 evolution performance under simulated UV-Vis irradiation when KIO3 was used as a sacrificial agent. The results show that the photocatalytic activity of the WO3/Cd2 Sn O4 heterojunction was superior to that of pure Cd2SnO4, and WO3 nanoparticles loaded on Cd2SnO4 particle surface can improve the interfacial electron transfer and the O2 evolution. The stable average oxygen evolution rate is 200 μmol/(g·h) when the amount of loaded WO3 is 2.3% in mass.

关 键 词：锡酸镉 光催化剂 异质结 光解水 析氧速率 

分 类 号：O643.36[理学—物理化学] TQ116.14[理学—化学]