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Photocatalytic Decomposition of Gaseous Ozone over $TiO_2$Thin Film  

Cho, Ki-Chul (Department of Environmental Science, DongNam Health College)
Hwang, Kyung-Chul (Department of Environmental Science, DongNam Health College)
Yeo, Hyun-Gu (Department of Environmental Engineering, Konkuk University Seoul)
Taizo Sano (National Institute of Advanced Industrial Science and Technology, Institute for Environmental Management Technology, Photoenergy Application Group, AIST Tsukuba West)
Koji Takeuchi (National Institute of Advanced Industrial Science and Technology, Institute for Environmental Management Technology, Photoenergy Application Group, AIST Tsukuba West)
Sadao Matsuzawa (National Institute of Advanced Industrial Science and Technology, Institute for Environmental Management Technology, Photoenergy Application Group, AIST Tsukuba West)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.19, no.E3, 2003 , pp. 121-127 More about this Journal
Abstract
The characteristics of heterogeneous photocatalytic decomposition were investigated at low concentration level of $O_3$on TiO$_2$for various operating parameters such as: loaded catalyst weight (0∼4 mg/$\textrm{cm}^2$), initial concentration of $O_3$(0.06∼10.0 ppm), gas flow rate (1.0 ∼ 2.5ι/min), and relative humidity (0∼80%). This study was conducted using a flow-type reactor at room temperature. Three kinds of pure TiO$_2$(P25, ST -01, and E- 23) were employed as photocatalyts. It was found that $O_3$removal ratio was identical, regardless of the loaded TiO$_2$weight in the range from 0.5 to 4.0 mg/$\textrm{cm}^2$. It was also found that higher initial ozone concentration results in greater oxidation rate of ozone and experimental data show kinetically a good agreement with Langmur-Hinshelwood kinetic model. We also observed that the removal ratio of $O_3$increases linearly with the increasing flow rate and also with the increasing relative humidity for each catalyst.
Keywords
Photocatalyst; Langmur-Hinshelwood; Kinetic model; Flow-type reactor;
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1 Hoffmann, M.R., S.T. Martin, W. Choi, and D.W. Bahnemann (1995) Environmental Applications of Semiconductor Photocatlsis, Chem. Rev., 95, 69-96
2 Imamura, S., M. Ikebat, T. Ito, and T. Ogita (1991) Decomposition of Ozone on a Silver Catalyst, Ind. Eng. Chem. Res., 30, 217-221
3 Ohtani, B., S.W. Zhangg, S.I. Nishimoto, and T. Kagiya (1992) Catalytic and Photocatalytic Decomposition of Ozone at Room Temperature over Titanium (IV) Oxide. J. Chem. Soc. Faraday Trans.. 88, 1049-1053
4 Rakitskaya, T.L., E.K. Vasi'leva, A.Y. Bandurko, and V.Y. Paina (1994) Kinetics of Ozone Decomposition on Activated Carbons, Kinetics and Catalysis, 35, 90-92
5 Calderbank, P.H. and J.M.O. Lewis (1976) Ozone-decomposition catalysis, Chem. Eng. Sci .. 31. 1216
6 Pichat, P.. J. Disdier, C. Hoang-Van, D. Mas, G. Goutailler, and C. Gaysse (2000) Purification/deodorization of indoor air and gaseous effluents by Ti$O_{2}$ photocatalysis, Catalysis Today, 63. 363-369
7 Griggs, M. (1968) Absorption Coefficients of Ozone in the Ultraviolet and Visible Regions, J. Chem. Phys., 49, 857-859
8 Li, W., G.V. Gibbs, and S.T. Oyama (1998) Mechanism of Ozone Decomposition on a Manganese Oxide Catalyst, J. Am. Chem. Soc., 120, 9041-9046
9 Gonzalez-Elipe, A.R., J. Soria, and G. Munuera(1981) Photo-decomposition of Ozone on Ti$O_{2}$, Z. Phys. Chem. N.F., 126, 251-257
10 Oyama, S.T. (2000) Chemical and Catalytic Properties of Ozone, Catal. Rev. Sci. Eng., 42, 279-322
11 Dhandapani, B. and S.T. Oyama (1995) Kinetics and Mechanism of Ozone Decomposition on a Manganese Oxide Catalyst, Chem, Lett., 413-414
12 Zhang, Y., J.C. Crittenden, D.W. Hand, and D.L. Perram (1994) Fixed-Bed Photocatalysts for Solar Decontamination of Water, Environ. Sci. Technol., 28, 435-442
13 Deitz, V.R. and J.L. Bitner (1973) Interaction of ozone with adsorbent charcoal, Carbon, 11, 393-401
14 Bulanin, K.M., J.C. Lavalley, and A.A. Tsyganenko (1995) Infrared Study of Ozone Adsorption on Ti$O_{2}$. Phys. Chem., 99, 10294-10298