Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (3): 6-9.

• Materials Science & Technology • Previous Articles     Next Articles

Photocatalytic Activity of Nano-Polycrystalline Titania

Zhu Hong-li1  Chen Ke-fu1  Qi De-wei2  Yang Ren-dang1   

  1. 1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. College of Engineering and Applied Science, Western Michigan University, Michigan 49008, USA
  • Received:2008-05-12 Revised:2008-08-29 Online:2009-03-25 Published:2009-03-25
  • Contact: 祝红丽（1982-），女，博士生，主要从事纸张加工技术与特种纸的研究． E-mail:scutpaperzhl@gmail．com
  • About author:祝红丽（1982-），女，博士生，主要从事纸张加工技术与特种纸的研究．
  • Supported by:

    广东省自然科学基金资助项目（06300222）;华南理工大学制浆造纸工程国家重点实验室开放式基金资助项目（200624）

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Abstract:

Polycrystalline TiO2 was prepared by means of ultrasonic dispersion, with pure anatase and rutile as the raw materials. The effect of crystal phase composition on the photocatalytic activity of the nano-polycrystalline TiO2 was then investigated. In the investigation, XRD was employed to analyze the crystal phase composition and crystal size, and gas chromatography was employed to evaluate the toluene degradation photo-assisted by the nano-polycrystalline TiO2. Experimental results show that, although the photocatalytic activity of the anatase is better than that of the rutile, an appropriate doping of rutile may improve the photocatalytic activity of nano-polycrystalline TiO2 due to the synergistic effect, and that the nano-polycrystalline TiO2 is of the highest photocatalytic activity when the mass ratio of anatase to rutile is 83： 17.

Key words: nano-sized titania, crystal phase composition, photocatalytic activity