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Received: 2000-02-26

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Journal of Zhejiang University SCIENCE A 2001 Vol.2 No.3 P.271-274

http://doi.org/10.1631/jzus.2001.0271


PHOTOCATALYTIC ACTIVITY OF LANTHANUM DOPING TiO2


Author(s):  YUE Lin-hai, SHUI Miao, ZHU Wang-liang, XU Zhu-de

Affiliation(s):  Department of Chemistry, Zhejiang University, Hangzhou 310027, China

Corresponding email(s): 

Key Words:  La doping, lattice expansion, TiO2, photocatalytic activity


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YUE Lin-hai, SHUI Miao, ZHU Wang-liang, XU Zhu-de. PHOTOCATALYTIC ACTIVITY OF LANTHANUM DOPING TiO2[J]. Journal of Zhejiang University Science A, 2001, 2(3): 271-274.

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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.

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Reference

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