Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (04): 915-920.doi: 10.3866/PKU.WHXB20100428

• CATALYSIS AND SURFACE STRUCTURE • Previous Articles     Next Articles

Hydrothermal Preparation and Photocatalytic Activity of Chlorine Doped Titanium Dioxide Supported on SiO2

DEDG Pei-Chang, HU Jie-Zhen, WANG Hai-Zeng, SUN Bao-Wei   

  1. College of Ocean and Meteorology, Ocean University of Guangdong, Zhanjiang 524088, Guangdong Province, P. R. China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, Shandong Province, P. R. China
  • Received:2009-10-16 Revised:2010-01-06 Published:2010-04-02
  • Contact: DEDG Pei-Chang E-mail:dpc0520@yahoo.cn

Abstract:

A chlorine doped titaniumdioxide photocatalyst was synthesized by a hydrothermal process using silica gel as a carrier, Ti(SO4)2 as a Ti source, and NaCl as a Cl source.We discuss factors such as the doping ratio of chlorine to titanium, the calcination temperature, and the ratio of titanium to silicon, all of which influence the photocatalytic activity of the sample.We found that the best chlorine to titaniumratio (nCl/nTi) was 15%, the best calcination temperature was 750 ℃, and the best ratio of titaniumto silicon (nTi/nSi) was 3:1. The BET surface area of the chlorine doped titanium dioxide supported on SiO2 (CTS) was 60.8 m2 ·g-1. No rutile phase of TiO2 was formed in the CTS after calcination at high temperature indicating that the presence of silica inhibited the phase transformation of TiO2 from anatase phase to rutile phase. It also influences the structural and textural properties of the chlorine doped titanium dioxide (CT). A phenol degradation test showed that the photocatalytic activity of the CTS was better than that of the CT although the TiO2 concentration in the CTS was 0.7740 g·g-1, which was less than that of the CT.

Key words: Titania, Chlorine doping, Silica, Photocatalysis, Phenol degradation

MSC2000: 

  • O648