(山东理工大学 材料科学与工程学院, 淄博 255049)
摘 要: 采用溶胶-凝胶法制备含有不同掺杂离子的TiO2溶胶和纳米粉， 采用浸渍提拉法将溶胶涂敷在自制的多孔陶瓷膜件上， 考察其对蚁酸溶液(1%)的光降解作用。 研究结果表明， 在适宜掺杂浓度(1%Fe3+, 0.5%La3+(摩尔浓度))下，Fe3+/La3+-TiO2膜的光催化性能最好。 采用X射线衍射仪分析、原子力电子显微镜和吸收光谱仪等研究单独掺杂Fe3+、 La3+和复合掺杂Fe3+/La3+离子的作用及膜的性能， 从而确定出提高TiO2光催化活性的最佳掺杂工艺。
关键字: TiO2薄膜； 光催化活性; 离子掺杂; 电子-空穴对; 烧结温度
（ School of Materials Science and Technology, Shandong University of Technology, Zibo 255049, China）
Abstract: The TiO2 sol and nano-powders with different dopants were prepared by sol-gel method. The nano-film was coated on the self-made porous ceramic by dipping-lift process. The photodegradation of formic acid solution(1%) on TiO2 film with different dopants was studied. The results show that the Fe3+/La3+-TiO2 film with the appropriate doping concentration (1%Fe3+, 0.5%La3+ (mole fraction)) has better photocatalytic activity. The roles and mechanism of doping Fe3+, La3+ and co-doping Fe3+/La3+ ions were studied by XRD and absorption spectra. And the appropriate doping procedure for increasing TiO2 photocatalytic activity was determined.
Key words: TiO2 coating film; photocatalytic activity; ions doping; electron-cave pairs; sintering temperature
