S掺杂TiO2催化剂的合成及其光催化性能  

Synthesis and Photocatalysis Properties of Sulfur Doped Nanocrystalline TiO_2 Photocatalyst

作　　者：王智宇[1] 高春梅[1] 赵彬[1] 祖胜男[1] 樊先平[1] 钱国栋[1] 

机构地区：[1]浙江大学材料科学与工程系

出　　处：《武汉理工大学学报》2008年第7期1-4,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(50532030);教育部跨世纪优秀人才培养计划

摘　　要：以钛酸四丁酯为原料、三乙醇胺作表面活性剂、硫脲为掺杂剂,采用水热法原位制备了S掺杂TiO2纳米光催化剂,通过XRD、TEM、DRS等对其进行了表征,通过光催化降解甲基橙对其可见光催化性能进行了表征。结果表明:所制得的样品中,TiO2呈锐钛矿晶型,颗粒尺寸大约十几纳米,样品具有良好的分散性;S的掺杂能有效拓展TiO2吸收光谱至可见光区,使其在可见光范围具有明显的光催化性能;掺杂剂的加入量均存在一个最佳值,较高的水热合成温度有利于对有机物进行降解。Sulfur doped nanocrystalline titanium dioxide photocatalysts were synthesized in situ employing hydrothermal method, with tetrabutyl titanate as titanium source, triethanolamine as surfactant and thiourea as doping agent. The as-prepared samples were characterized by X-ray diffraction （XRD）, Transmission electron microscopy （TEM） and UV-Vis diffuse reflectance spectroscopy. The photocatalytic activity of the products was evaluated by the photocatalytic decomposition of methyl orange under visible light. The XRD patterns demonstrated that TiO2 was anatase structured, and the TEM images displayed that the average particle sizes of the as-prepared powders were nanometric（ 10 nm or so）. Doping sulfur can narrow the band gap of TiO2, and make the absorption edges shift to a longer wavelength effectively, so enhance its photocatalytic activity under visible light. There appeared to be an optimal doping amount of sulfur at which the sample showed the most photocatalytic activity, and higher hydrothermal temperature did favor of the phtocatalytie activity.

关 键 词：TIO2 硫脲 掺杂 水热 光催化 可见光 

分 类 号：O643[理学—物理化学]