Acta Phys. -Chim. Sin. ›› 2000, Vol. 16 ›› Issue (05): 459-463.doi: 10.3866/PKU.WHXB20000517

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Effect of Lanthanum Doping on the Photocatalytic Activity of Titanium Dioxide

Shui Miao, Yue Lin-Hai, Xu Zhu-De   

  1. Department of Chemistry,Zhejiang University,Hangzhou 310027
  • Received:1999-06-14 Revised:1999-10-20 Published:2000-05-15
  • Contact: Yue Lin-Hai

Abstract:

The effect of Lanthanum content, calcinating temperature and calcinating time on the photocatalytic activity of Lanthanum doping TiO 2 was investigated. The study showed that samples treated under higher temperature and longer calcinating time exhibited higher photocatalytic activity. The X ray diffraction pattern revealed that the lattice of those samples was highly expanded. It is suggested that the highly distorted crystal lattice may be involved in producing more ways by which the hole was captured. Thus, the photocatalytic activity of samples treated under higher temperature and longer time was promoted.

Key words: Lanthanum doping, Photocatalytic activity, Titanium dioxide, Lanttice expansion