Preparation and photocatalytic activity of La and Y co-doped nano TiO2

摘要：

La and Y co-doped TiO2 nano photocatalyst (La-Y/TiO2) was prepared by sol-gel method, and characterized by X-ray diffraction (XRD), specific surface area (BET), scanning electron microscope (SEM) and high resolution transmission electron microscopy (HRTEM). The photocatalytic activity of the La-Y/TiO2 was evaluated by the degradation of methylene blue (MB) under UV light. Parameters effecting photocatalytic process such as La and Y doping concentration, calcination temperature, the dosage of catalyst and the pH of MB solution were investigated. The co-doped TiO2 catalyst showed obviously higher photocatalytiC activity for the degradation of methylene blue (MB). The presence of La and Y ions in the TiO2 particles would prevent the recombination of the electron-hole on the surface of TiO2 effectively.

关键词： rare earth photocatalyst nanometer TiO2 methylene blue

作者: Tianyong Zhang Huixian Shi Quisheng Yang Xu Liu Cong Han

作者单位: School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China

会议类型: 国际会议

会议名称: The 8th China International Nanoscience and Technology Symposium(2009第八届中国国际纳米科技湘潭研讨会Cinsts09)

会议地点: 湖南湘潭

会议语种:英文

页码: 1-6

在线出版日期: 2009-10-23（万方平台首次上网日期，不代表论文的发表时间）