Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)

Changsha,China,10.16-10.18,2010

ISBN: 978-1-935068-41-9 Scientific Research Publishing, USA

E-Book 2313pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $360

Title: Influence of Metal Ions Doping on Crystallization and Photo-Activity of TiO2 Prepared by Adsorption Phase Synthesis
Source: Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK) (pp 1025-1030)
Author(s): Ting Wang, College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
Li-guang Wu, College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China National Engineering Research Center for Liquid Separation Membrane,Hangzhou, 310012, China
Xin Jiang, Department of Chemical Engineering, Zhejiang University, Hangzhou 310027, China
Abstract: TiO2 composite photocatalysts doped with different metal ions were prepared by adsorption phase synthesis. And photodegradation experiments of methyl-orange were employed to evaluate the activity of these photocatalysts. The influence of metal ions with different species and concentrations on crystallization and photo-activity of TiO2 was explored by X-ray Diffraction (XRD) and spectrophotometer, respectively. The results indicated that the crystallization of TiO2 was restricted due to replace of Ti4+ in TiO2 lattice structure by other metal ions, when sizes of metal ions were close to Ti4+. This inhibition of crystallization also weakened the photo-activity of TiO2 doped with metal ions. With doping of a few metal ions with larger radius than Ti4+, the distortion happened in the TiO2 lattice structure to form a small amount of defects. In this case, the activity of this TiO2 composite photocatalyt was higher than TiO2 without metal ions doping.
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