氮离子和稀土离子共掺杂纳米TiO_2光催化性能的研究  

Photocatalytic Properties of TiO_2 Nano-Particles Codoped with Nitrogen and Rare Earth Ions

作　　者：冯光建[1] 刘素文[1] 修志亮[1] 俞娇仙[1] 罗杰[1] 

机构地区：[1]山东轻工业学院材料科学与工程学院,山东济南250353

出　　处：《中国稀土学报》2008年第2期148-152,共5页Journal of the Chinese Society of Rare Earths

基　　金：山东省科技攻关项目(2005GG4203007)资助

摘　　要：以钛酸丁酯为原料,以尿素和稀土离子的硝酸盐溶液为掺杂物质,用溶胶-凝胶法制备了氮离子和稀土离子共掺杂的纳米TiO2样品。采用TEM,BET,UV-VIS等方法对样品进行了表征,通过可见光下降解硝基苯对样品的光催化活性进行了研究。结果表明,氮和稀土离子(Y,Nd)共掺杂可增大光催化剂的光吸收范围,并提高其催化活性;当N,Y和Nd离子以7%,2.0%和1.5%(摩尔分数)共掺杂时,制备的样品具有最佳的光催化性能。N and rare earth ions codoped TiO2 nanoparticles were prepared by sol-gel method using tetrabutyl titanate as precursors, and urea and rare earth nitrates as doped materials. The products were characterized by Transmission Electron Microscope （TEM）, Brunauer-Enmet-Teller （BET） and UV-VIS diffuse reflectance spectra. The photocatalytic activities werestudied by degradation of nitrobenzene under visible light. The results showed that the eodoping of N and rare earth ions inereased the light absorbanee range and raised the photoeatalytie aetivities. In this study, the photocatalytie properties of 7mol% N, 2.0mol % y^3＋ and 1.5mol%Nd eodoped samples were the opfima.

关 键 词：溶胶-凝胶法 共掺杂 光催化 稀土 

分 类 号：TQ426.94[化学工程]