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Phase structure of W-doped nano-TiO2 produced by sol-gel method

✍ Scribed by Yucheng Wu; Xiaoye Hu; Ting Xie; Guanghai Li; Lide Zhang

Publisher
Elsevier
Year
2005
Tongue
English
Weight
299 KB
Volume
3
Category
Article
ISSN
1672-2515

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✦ Synopsis

With Ti(OBu) 4 as precursor, and HAc as complexing agent, pure and W-doped TiO 2 gelatins were prepared by a sol-gel method. During the process of gel formation, metal ions were dispersed in the porous TiO 2 matrix. Then, powders of nano-TiO 2 and W-doped nano-TiO 2 were prepared by drying, grinding and heat treatment at different temperatures. The grain size and structure of the samples, pure TiO 2 and W-doped, and treated at different temperatures, were studied by X-ray diffraction (XRD), Beckman Coulter Sorption Analysis and TEM. Results showed that, with increasing temperature, the TiO 2 transformed from anatase to rutile and the grain size increased. This transformation and grain growth of TiO 2 could be retarded by doping with W.

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