Dependence of Ag Deposition Methods on the Photocatalytic Activity and Surface State of TiO 2 with Twistlike Helix Structure

  • Li J
  • Xu J
  • Dai W
 et al. 
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The 1% silver clusters containing twistlike helix titania nanoparticles have been synthesized and tested in photocatalytic applications. The special twistlike helix structures were obtained by controlling the hydrolysis of titanium tetrachloride, while variety of routes were investigated to deposit the silver nanoparticles, where impregnation, chemical deposition, and photodeposition methods are adopted to fabricate the Ag/TiO2 samples. The influence of the photocatalytic activity of the mesoporous helix materials and the preparation methods on the final structure of the samples was investigated, including the surface area, pore size, silver crystallite size, silver distribution, and silver surface content. The dispersion and particle size of Ag clusters or nanoparticles on Ag/TiO2 nanocatalysts were investigated by TEM analysis. The surface Ag nanoparticles contents were determined by XPS results. Diffuse reflectance and photoluminescence analysis were used to investigate the visible light adsorption abi...

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  • Jingxia Li

  • Jianhua Xu

  • Wei-lin Dai

  • Kangnian Fan

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