Enhanced photoactivity of neodymium doped mesoporous titania synthesized through aqueous sol–gel method

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• 作者：K. V. Baiju ; P. Periyat ; W. Wunderlich ; P. Krishna Pillai ; P. Mukundan and K. G. K. Warrier
• 关键词：Sol–gel ; Titania ; Photocatalyst ; Anatase ; Rutile
• 刊名：Journal of Sol-Gel Science and Technology
• 出版年：2007
• 出版时间：September, 2007
• 年：2007
• 卷：43
• 期：3
• 页码：283-290
• 全文大小：444 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Ceramics,Glass,Composites,Natural Materials
  Inorganic Chemistry
  Optical and Electronic Materials
  Nanotechnology
  
• 出版者：Springer Netherlands
• ISSN：1573-4846

文摘

Nanosize neodymium doped titania has been prepared by hydrolysis of titanium oxychloride followed by peptisation under acidic condition. The anatase to rutile phase transformation temperature was found to increase by 150 °C as a result of neodymium doping. The doped sample shows 10 times higher surface area than the undoped one after calcining at 700 °C. All the samples calcined at 500, 600 and 700 °C show type IV isotherm, which is characteristic of mesoporous material. The pore size distribution curves also show that the pores are in mesoporous region. Further, the neodymium doped titania shows increased photoactivity than the undoped titania with respect to decomposition of methylene blue when subjected to UV light. The transmission electron micrograph indicates that a nanocrystalline doped titania is obtained through the present method. The effect of neodymium doping on the anatase phase stability, specific surface area and photoactivity are reported.