Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (09): 784-788.doi: 10.3866/PKU.WHXB19990903

• ARTICLE • Previous Articles     Next Articles

The Preparation of Nanosized Anatase TiO2 Powder by Using TiCl4 a Precursor

Zhu Yong-Fa, Zhang Li, Gao Chong, Yao Wen-Qing, Cao Li-Li   

  1. Department of Chemistry,Tsinghua University,Beijing 100084
  • Received:1998-10-09 Revised:1999-01-18 Published:1999-09-15
  • Contact: Zhu Yong-Fa

Abstract:

Nanosized anatase TiO_2 powder was prepared by using TiCl_4 ethanol solution as a precursor. The distribution of particle size was homogeneous, and the particle size of TiO_2 was about 10 nm after the precursor was calcined at 773 K for 1 h. The gelatinizing mechanism of TiCl_4 in ethanol solution can be described as followings. When TiCl_4 was mixed with ethanol, the former reacted with ethanol to form Ti(OCH_2CH_3) 4 species which during the gelatinizing process, absorbed water from the atmosphere to form Ti(OH)_4 precursor. The formation of inorganic polymer of Ti(OH) 4 was intensified with the increase of gelatinizing time, but the organic component decreased. The formation of anatase TiO_2 can also be promoted by the increase of gelatinizing time.

Key words: Titanium dioxide, Sol-gel, TiO2