Photocatalytic Activity of Metal Ion (Fe or W) Doped Titania

Sang Soo Lee; Hyun Jong Kim; Kim Taek Jung; Hak Soo Kim; Yong Gun Shul

Korean Journal of Chemical Engineering, Vol.18, No.6, 914-918, November, 2001

DOI10.1007/BF02705618 Export Citation

Photocatalytic Activity of Metal Ion (Fe or W) Doped Titania

Sang Soo Lee, Hyun Jong Kim, Kim Taek Jung, Hak Soo Kim¹, and Yong Gun Shul^†

Department of Chemical Engineering, Yonsei University, Seoul 120-749, Korea
¹Department of Chemica Engineering, Sunmoon University, Chung-nam 336-708, Korea

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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.

Keywords:Photocatalysis;Photocatalyst;TiO2;Metal-Doped TiO2

[References]

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[1] Anpo M, Zhang SG, Mishima H, Matsuoka M, Yamashita H, Catal. Today, 39(3), 159 (1997)

[2] Gotic M, Ivanda SA, Music S, Popovoic S, Turkovic A, Furic K, Mater. Lett., 28, 225 (1996)

[3] Hoffmann MR, Martin ST, Choi WY, Bahnemann DW, Chem. Rev., 95(1), 69 (1995)

[4] Linsebigler AL, Lu GQ, Yates JT, Chem. Rev., 95(3), 735 (1995)

[5] Litter MI, Navio JA, J. Photochem. Photobiol. A-Chem., 98, 171 (1996)

[6] Mills A, Hunte SL, J. Photochem. Photobiol. A-Chem., 108, 1 (1997)

[7] Nimlos MR, Wolfrum EJ, Brewer ML, Fennell JA, Bintner G, Environ. Sci. Technol., 30, 3102 (1996)

[8] Palmisano L, Sclafani A, "Thermodynamics and Kinetics for Heterogeneous Photocatalytic Process," in Heterogeneous Photocatalysis, edited by M. Schiavello, John Wiley & Sons (1997)

[9] Scholz A, Schnyder B, Wokaun A, J. Molecular Catal. A: Chem., 138, 249 (1999)

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