(1. 中國科學院 廣州能源研究所， 廣州 510640；
2. 四川攀枝花鋼鐵集團公司鋼鐵研究院， 攀枝花 617000)
摘 要: 通過溶膠凝膠法制備了以不同方式和不同濃度摻Mo的TiO2薄膜。 通過X射線衍射(XRD)、 UV-VIS透射光譜、 電化學阻抗譜分析了Mo對TiO2薄膜晶粒結(jié)構(gòu)、 光吸收性能、 阻抗的影響。甲基橙光催化降解實驗表明， 鉬的最佳摻雜方式為在薄膜底層摻雜， 在表層及體相摻雜的效果均比未摻雜的TiO2差； 其中以Mo的摩爾分數(shù)為1.0%、 在薄膜底層摻雜時TiO2薄膜的光催化活性最佳。并從載流子分離效率方面討論了摻雜方式及摻雜濃度對光催化活性的影響。
關(guān)鍵字: 光催化； TiO2；薄膜； Mo； 摻雜方式
of Mo/TiO2 films
WANG Liang-yan1, HE Ming-xing2
（ 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
