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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2001, Vol. 2 Issue (3): 271-274    DOI: 10.1631/jzus.2001.0271
Science & Engineering     
PHOTOCATALYTIC ACTIVITY OF LANTHANUM DOPING TiO2
YUE Lin-hai, SHUI Miao, ZHU Wang-liang, XU Zhu-de
Department of Chemistry, Zhejiang University, Hangzhou 310027, China
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Abstract  The photocatalytic activity of the mixtures of TiO2 with the rare earth oxide La was investigated. The study on the effect of the rare earth oxide content, calcinating temperature and calcinating time on the performance of the mixture revealed that sample treated under higher temperature and longer time had higher photoactivity than pure TiO2. The experimental results of polycrystalline X-ray diffraction showed that the extent of the lattice expansion varied with the variation of calcinating temperature or time. It is suggested that this might be due to the variation of La content diffused into the TiO2 lattice. The La in the lattice may inhibit the recombinatin of photogenerated electron-hole pairs and thus enhance the photoactivity.

Key words： La doping      lattice expansion      TiO2      photocatalytic activity     
Received: 26 February 2000     
CLC:  O612.4  
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SHUI Miao
YUE Lin-hai
ZHU Wang-liang
XU Zhu-de
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YUE Lin-hai, SHUI Miao, ZHU Wang-liang, XU Zhu-de. PHOTOCATALYTIC ACTIVITY OF LANTHANUM DOPING TiO2. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2001, 2(3): 271-274.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2001.0271     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2001/V2/I3/271

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