溶胶-凝胶法制备WO_3的光分解水析氧活性  

Phototcatalytic Activity for O_2 Evolution of WO_3 Prepared by Sol-gel Method

作　　者：尹周澜[1] 刘琼莎[1] 陈启元[1] 王炜[2] 

机构地区：[1]中南大学化学化工学院,长沙410083 [2]中南大学材料科学与工程学院,长沙410083

出　　处：《有色金属》2010年第2期70-73,共4页Nonferrous Metals

基　　金：国家高技术研究发展计划资助项目(2002AA327140)

摘　　要：以W粉为原料,通过溶胶-凝胶法法合成了WO3催化剂前驱体。在恒定Ar气气流下,将溶胶-凝胶法制备所得前驱体在不同温度下加热分解,制备催化剂。考察催化剂在电子接受体Fe3+溶液体系中的光催化分解水析氧活性,并采用XRD,IR和PL光谱对催化剂进行表征。结果表明,由溶胶-凝胶法所制备WO3前驱体在350℃下处理4h后所得催化剂光催化析氧活性最高。在恒定气流下,随着处理温度的升高,WO3催化剂表面氧空位先增加,后减少,其光催化析氧活性也是先增加后减少。即氧空位越多,样品粒度越小,PL检测信号强度越强,光催化活性越高。The WO3 precursor is prepared by sol-gel method with tungsten powder as the raw material,and WO3 catalyst is produced by sintering precursor in constant Ar gas flow rate.The photocatalytic activity of WO3 for O2 evolution in system of Fe3 + solution is studied,and the catalysts are identified by XRD,IR and PL measurements.The results indicate that WO3 samples calcined at 350℃ for 4h exhibites excellent photocatalytic activity for water splitting to O2.With the increasing temperature in constant Ar gas flow,...

关 键 词：冶金技术 WO3 溶胶-凝胶法 氧空位 光催化 分解水 

分 类 号：O614.613[理学—无机化学]