【作者】 王智宇； 赵彬； 高春梅； 祖胜男； 樊先平； 钱国栋；

【Author】 WANG Zhi-yu , ZHAO Bin , GAO Chun-mei, ZU Sheng-nan , FAN Xian-ping, QIAN Guo-dong (Department of Materials Science and Engineering of Zhejiang University, State Key Laboratory of Silicon Materials, Hangzhou 310027, China)

【机构】 浙江大学材料科学与工程系硅材料国家重点实验室；

【摘要】 以四氯化钛为原料、三乙醇胺作表面活性剂、硫脲为掺杂剂,采用溶胶-凝胶法原位制备了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(MO)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,颗粒尺寸在20-30nm之间,样品具有较好的分散性;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;掺杂剂的加入量及热处理温度均存在一个最佳值。更多还原

【Abstract】 Sulfur doped nanocrystalline titanium dioxide photocatalysts were synthesized in situ employing Sol-Gel method, with titanium tetrachloride 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(20-30 ran). 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 and calcined temperature at which the sample snowed the most photocatalytic activity.更多还原