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Citation: JING Li-Qiang, FU Hong-Gang, WANG De-Jun, WEI Xiao, SUN Jia-Zhong. Surface Photoinduced Charge Separation and Photocatalytic Activity of Sn Doped TiO₂ Nanoparticles[J]. Acta Physico-Chimica Sinica, ;2005, 21(04): 378-382. doi: 10.3866/PKU.WHXB20050407 shu

Surface Photoinduced Charge Separation and Photocatalytic Activity of Sn Doped TiO₂ Nanoparticles

1.
State Key Laboratory of Theoretical and Computational Chemistry. Institute of Theoretical Chemistry, Jilin University; School of Chemistry, Jilin University, Changchun 130023; School of Chemistry and Material Science. The Laboratory of Physical Chemistry, Heilongjiang University, Harbin 150080

Received Date: 11 August 2004
Available Online: 15 April 2005

In this paper, different Sn doped TiO₂ nanoparticles were prepared by a sol-gel method, and were mainly characterized by surface photovoltage spectroscopy (SPS) and photoluminescence spectroscopy (PL). The photocatalytic activity of the as-prepared samples was evaluated by degrading the phenol solution. The effects of the calcination temperature and doping Sn content on the separation of surface photoinduced charge carriers and photocatalytic activity of TiO₂ nanoparticles were discussed, and the modification mechanisms of Sn were analyzed. The results showed that the appropriate content of Sn dopant could effectively promote the separation of surface photoinduced charge carrier of TiO₂ nanoparticles calcined at appropriate temperature, which was responsible for the remarkable increase in photocatalytic activity.
- TiO₂; Sol-gel; Dopping; Sn; Photocatalysis
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Surface Photoinduced Charge Separation and Photocatalytic Activity of Sn Doped TiO₂ Nanoparticles