物理化学学报 >> 2005, Vol. 21 >> Issue (04): 378-382.doi: 10.3866/PKU.WHXB20050407

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掺Sn的纳米TiO2表面光致电荷分离及光催化活性

井立强; 付宏刚; 王德军; 魏霄; 孙家钟   

  1. 吉林大学理论化学研究所, 理论化学与计算国家重点实验室; 吉林大学化学学院, 长春 130023; 黑龙江大学化学化工与材料学院物理化学实验室, 哈尔滨 150080
  • 收稿日期:2004-08-11 修回日期:2004-11-11 发布日期:2005-04-15
  • 通讯作者: 王德军 E-mail:wangdj@mail.jlu.edu.cn

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

JING Li-Qiang; FU Hong-Gang; WANG De-Jun; WEI Xiao; SUN Jia-Zhong   

  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:2004-08-11 Revised:2004-11-11 Published:2005-04-15
  • Contact: WANG De-Jun E-mail:wangdj@mail.jlu.edu.cn

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摘要： 采用溶胶-凝胶法制备了不同掺Sn量的TiO2纳米粒子, 主要利用表面光电压谱(SPS)和光致发光光谱(PL)对样品进行了表征, 并通过光催化降解苯酚实验来评估样品活性. 重点考察了热处理温度和掺Sn量对样品表面光生载流子的分离及光催化活性的影响, 并探讨了Sn使TiO2纳米粒子改性的机制. 结果表明, 在适当温度处理下, 适量Sn的掺入能够有效促进TiO2纳米粒子表面光生载流子的分离, 以至于使其光催化活性得到显著提高.

关键词: TiO2, 溶胶-凝胶法, 掺杂, Sn, 光催化

Abstract: 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.

Key words: TiO2, Sol-gel, Dopping, Sn, Photocatalysis