Enhanced photoactivity of neodymium doped mesoporous titania synthesized through aqueous sol–gel method |
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Authors: | K V Baiju P Periyat W Wunderlich P Krishna Pillai P Mukundan K G K Warrier |
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Institution: | (1) Materials and Minerals Division, Regional Research Laboratory (CSIR), Thiruvananthapuram, 695 019, India;(2) Faculty of Engineering, Department of Material Science, Tokai University, Kanagawa 259-1292, Japan |
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Abstract: | 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. |
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Keywords: | Sol– gel Titania Photocatalyst Anatase Rutile |
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