Crystallization and Photocatalytic-activity of TiO2 Doped with Metal lons Prepared by Adsorption Phase Synthesis
TiO2 photocatalysts doped with different metal ions were prepared by adsorption phase synthesis.The influence of different dopant metal ions with various concentrations on the crystallization of TiO2 was ex-plored by XRD.Then photodegradation experiments of methyl-orange were employed to evaluate the activity of these photocatalysts.The results indicated that the crystallization of TiO2 was restricted after doping,due to replacement of Ti4+ in TiO2 lattice structure by other metal ions.And the restriction became stronger with radius and concentration of doping ions increasing.There was an optimum dopant concentration appeared during preparation of TiO2 doped with Cd2+ and Fe3+.When dopant concentration was less or more than this optimum value,the photocatalytic activity of TiO2 doped with metal ions was lower than that of TiO2 without doping.Since radius of Fe3+ was close to Ti4+,the influence of Fe3+ dopant concentration on crystallization and activity of TiO2 was more obvious than that of Cd2+ doping.
Adsorption phase synthesis Metal ions doping TiO2 Photodegradation Methyl-orange
Ting Wang Yan-dong Mao Fang-peng Tang Jun Xing Li-guang Wu
College of Environmental Science and Engineering,Zhejiang Gongshang University,Hangzhou,310012,China
国际会议
桂林
英文
194-199
2012-07-16（万方平台首次上网日期，不代表论文的发表时间）