Preparation and Characterization of La Doped TiO2 Nanoparticles by Sol-hydrothermal Method

Abstract

Abstract: TiO₂ nanoparticles doped with different content of La were prepared by a sol-hydrothermal method, and also
characterized by surface photovoltage spectroscopy (SPS) and photoluminescence (PL) spectra. The effect of La dopant content and
calcination temperature on surface photoelectrical and photoluminescence performance was investigated, and their inherent relationships
discussed. The results show that an appropriate content of La dopant could effectively enhance the photocatalytic activity of TiO₂ calcined at
appropriate temperature. Moreover, there are certain relationships among SPS and PL and the activity, i.e., the stronger the SPS and PL signals,
the larger the separation rate of photoinduced electron-hole pairs, the higher the photocatalytic activity of La doped TiO₂ nanoparticles.

Key words: TiO₂, sol-hydrothermal method, La, doping, photocatalysis

CLC Number:

O643

JING Li-Qiang,SUN Zhi-Hua,WANG Bai-Qi,QU Yi-Chun,FU Hong-Gang. Preparation and Characterization of La Doped TiO₂ Nanoparticles by Sol-hydrothermal Method[J]. Journal of Inorganic Materials.

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Preparation and Characterization of La Doped TiO₂ Nanoparticles by Sol-hydrothermal Method

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