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Volume 33 Issue 05
May  2007
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Journal of Beijing University of Aeronautics and Astronautics  > 2007  >  33(05): 608-612.
Song Zhaoqing, Mao Jianqin. First-order D-type iterative learning control for a class of nonlinear systems[J]. Journal of Beijing University of Aeronautics and Astronautics, 2005, 31(11): 1212-1216. (in Chinese)
Citation: Yu Qinghe, Zhou Chungen. Plasma spraying of the nano-structured TiO2 coatings and its photocatalytic properties[J]. Journal of Beijing University of Aeronautics and Astronautics, 2007, 33(05): 608-612. (in Chinese)
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Plasma spraying of the nano-structured TiO2 coatings and its photocatalytic properties

  • School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

  • Received Date: 12 Jun 2006
  • Publish Date: 31 May 2007
    Abstract
  • The starting nano-TiO2 feedstock was agglomerated by spray-drying process. Nano-TiO2 coatings on transparent glasses were prepared by plasma spraying. The coating proceeded heat treatment at 300℃,400℃ and 500℃ respectively. The phase structure and the morphology of the TiO2 coatings were characterized by X-ray diffraction(XRD), scanning electron microscope(SEM) and transmission electron microscope(TEM). The porosity of the TiO2 coatings was tested by mercury porosimetry method. The result shows that the content of anatase TiO2 in the sprayed coatings is approximate to 30%~50%, and its grain size is about 10~30nm.The porosity of the TiO2 coatings is less than 6%,but has a great influence to the photocatalytic properties. After heat treatment at 300℃,400℃ and 500℃, the coating becomes denser and has a lower porosity, which leads to a decrease in photocatalytic properties. Sprayed nano-TiO2 coating obtained without heat treatment at the spraying current of 400A has the best photocatalytic property.

     

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