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Received August 28, 2006
Accepted June 27, 2007
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Photocatalytic activities and specific surface area of TiO2 films prepared by CVD and sol-gel method
Department of Environmental Engineering, Sunchon National University, 315 Maegok, Suncheon, Jeonnam 540-742, Korea
jsc@sunchon.ac.kr
Korean Journal of Chemical Engineering, March 2008, 25(2), 364-367(4), 10.1007/s11814-008-0060-z
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Abstract
The photocatalytic activity of CVD grown films shows significant, non-linear (sigmoid-like) dependency on the film thickness. However, the photocatalytic activity of sol-gel grown film is almost independent of the film thickness. The specific surface area of sol-gel grown films is very small, regardless of the film thickness. Conversely, the specific surface area of CVD grown films indicates significant thickness dependency. The specific area and photocatalytic activity were found to show very similar dependencies on the film thickness.
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References
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Chang C, Ma Y, Fang G, Chao A, Tsai M, Sung H, Chemosphere, 56, 1011 (2004)
Pichat P, Disdier J, Hoang-Van C, Mas D, Goutailler G, Gaysse C, Catal. Today, 63(2-4), 363 (2000)
Boujday S, Wunsch F, Portes P, Bocquet J, Colbeau-Justin C, Solar Energy Materials & Solar Cells, 83, 421 (2004)
Almquist C, Biswas P, J. Catal., 212, 145 (2002)
Yamabi S, Imai H, Thin Solid Films, 434(1-2), 86 (2003)
Jung SC, Kim SJ, Imaishi N, Cho YI, Appl. Catal. B: Environ., 55(4), 253 (2005)
Jung SC, Imaishi N, Korean J. Chem. Eng., 18(6), 867 (2001)
