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Received September 7, 2001
Accepted October 13, 2001
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Photocatalytic Activity of Metal Ion (Fe or W) Doped Titania
Department of Chemical Engineering, Yonsei University, Seoul 120-749, Korea 1Department of Chemica Engineering, Sunmoon University, Chung-nam 336-708, Korea
Korean Journal of Chemical Engineering, November 2001, 18(6), 914-918(5), 10.1007/BF02705618
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Abstract
Iron or tungsten-doped nano TiO2 were successfully synthesized from TiCl4. All of the samples showed anatase phase of TiO2. For the iron-doped TiO2, Iron ion was well dispersed in the TiO2 lattice. However, tungsten-doped TiO2 formed 12-tungstate with anatase TiO2. As the concentration of tungsten increased, 12-tungstate disappeared. The photocatalytic oxidation of acetaldehyde was evaluated to examine the photocatalytic characteristics of metal-doped TiO2. Because of the surface containing metal oxide or metal precursors at high concentration metal ion, increasing the concentration of W or Fe ion decreased the reactivity. The reaction rate was drastically increased after 300 degreesC heat treatment. Furthermore, the photocatalytic activity of iron- or tungsten-doped TiO2 was higher than that of synthesized pure TiO2 and commercial TiO2.
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References
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Mills A, Hunte SL, J. Photochem. Photobiol. A-Chem., 108, 1 (1997)
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