(1. 中国科学院 广州能源研究所， 广州 510640；
2. 四川攀枝花钢铁集团公司钢铁研究院， 攀枝花 617000)
摘 要: 通过溶胶凝胶法制备了以不同方式和不同浓度掺Mo的TiO2薄膜。 通过X射线衍射(XRD)、 UV-VIS透射光谱、 电化学阻抗谱分析了Mo对TiO2薄膜晶粒结构、 光吸收性能、 阻抗的影响。甲基橙光催化降解实验表明， 钼的最佳掺杂方式为在薄膜底层掺杂， 在表层及体相掺杂的效果均比未掺杂的TiO2差； 其中以Mo的摩尔分数为1.0%、 在薄膜底层掺杂时TiO2薄膜的光催化活性最佳。并从载流子分离效率方面讨论了掺杂方式及掺杂浓度对光催化活性的影响。
关键字: 光催化； TiO2；薄膜； Mo； 掺杂方式
of Mo/TiO2 films
（ 1. Guangzhou Institute of Energy Conversion,
Chinese Academy of Science, Guangzhou 510640, China;
2. Panzhihua Iron & Steel Group Co., Panzhihua 617000, China）
Abstract: TiO2 thin films doped with Mo were synthesized under various modes and concentrations. The effects of Mo doping on TiO2 films were characterized by XRD, UV-VIS transmittance spectra and electrochemical impedance spectroscopy. The results show that TiO2 catalysts doped with Mo6+ extend absorption edge and charge transfer resistance of interfacial decrease. The degradation of methyl orange shows that the best doping mode of Mo6+ is doped on a bottom layer and the photocatalytic activity is lower than pure TiO2 under surface Mo6+-doped and bulk Mo6+-doped modes. Of all, the best Mo6+-doped concentration is 1.0%(in mole fraction) on a bottom layer and the activity is increased obviously. The effects of doping mode and doping concentration on the photocatalytic activities of Mo6+-doped TiO2 films from charge carriers separated efficiency aspect were discussed.
Key words: photocatalysis; TiO2； thin film; Mo; doping mode
