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Photooxidative self-cleaning transparent titanium dioxide films on glass

Published online by Cambridge University Press:  03 March 2011

Y. Paz ,
Z. Luo ,
L. Rabenberg  and
A. Heller
Y. Paz
Affiliation:
Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712-1062
Z. Luo
Affiliation:
Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712-1062
L. Rabenberg
Affiliation:
Department of Mechanical Engineering and Center for Materials Science, The University of Texas at Austin, Austin, Texas 78712-1062
A. Heller
Affiliation:
Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712-1062
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Abstract

In the context of studying the feasibility of photocatalytically self-cleaning windows and windshields, clear, abrasion resistant, photocatalytic films of TiO2 were formed on soda lime glass and on fused quartz by a sol-gel process. The rate of photooxidation of contaminant deposits was estimated by measuring the rate of decrease in the integrated IR absorbance associated with the C-H stretching vibrations of a thin solution-cast film of stearic acid under 365 nm (2.4 mW/cm2) or 254 nm (0.8 mW/cm2) irradiation. Approximately 3 × 10−4 stearic acid molecules were stripped per 365 nm photon in either front- or back-illuminated soda lime glass, and 6 × 10−4 molecules when the films were coated on fused quartz. For thin TiO2 films on fused quartz, the rate of photooxidation, normalized by the number of photons absorbed per unit area, was independent of the wavelength. In contrast, for films on soda lime glass, the rate of photooxidation, when similarly normalized, was higher for the less penetrating wavelength. The reduced photoactivity on glass at the deeply penetrating wavelength (365 nm), as well as the greater photoefficiency on quartz than on glass, are attributed to diffusion of sodium oxide from the glass into the inner glass-contacting zone of the TiO2 layer.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 11 , November 1995 , pp. 2842 - 2848
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

1Matthews, R. W. and McEvoy, S.R., J. Photochem. Photobiol. A: Chem. 64, 231 (1992).CrossRefGoogle Scholar
2Sakata, T. and Kawai, T., Chem. Phys. Lett. 80, 341 (1981).CrossRefGoogle Scholar
3Peral, J. and Ollis, D., J. Catalysis 136,554 (1992).CrossRefGoogle Scholar
4Dibble, L. A. and Raupp, G.B.Catalysis Lett. 4, 345 (1990).CrossRefGoogle Scholar
5Zeltner, W. A., Hill, C.G. Jr., and Anderson, M. A., Chemtech, 21 (May 1993).Google Scholar
6Fan, J.C.C. and Bachner, F. J., Appl. Opt. 15, 1012 (1976).CrossRefGoogle Scholar
7Bach, H. and Schroeder, H., Thin Solid Films 1, 255 (1967/68).CrossRefGoogle Scholar
8Schroeder, H., Phys. Thin Films 5, 87 (1969).Google Scholar
9Wald, A., Chem. Mater. 5, 280 (1993).CrossRefGoogle Scholar
10Gerischer, H. and Heller, A., J. Phys. Chem. 95, 5261 (1991).CrossRefGoogle Scholar
11Shevchenko, A. V., Lopato, L. M., Maister, I. M., and Gorbunov, O. S., Russ. J. Inorg. Chem. 25, 1379 (1980).Google Scholar
12Sanchez, C., Livage, J., Henry, M., and Babonneau, F., J. Non-Cryst. Solids 100, 65 (1988).CrossRefGoogle Scholar
13Morita, Y., U.S. patent 4735 869 (Apr. 1988).Google Scholar
14Paz, Y., Trakhtenberg, S., and Naaman, R., J. Phys. Chem. 98, 13517 (1994).CrossRefGoogle Scholar
15Paz, Y., PhD. Dissertation, Weizmann Inst. of Science, Israel (1994).Google Scholar
16Calvert, J.G. and Pitts, J.N., Photochemistry, 2nd ed. (John Wiley and Sons Inc., New York, 1967), pp. 783–786.Google Scholar
17Hodes, G., Albu-Yaron, A., Decker, F., and Motisuke, P., Phys. B 36, 4215 (1987).Google Scholar
18Brus, L.E., J. Phys. Chem. 90, 2555 (1986).CrossRefGoogle Scholar
19Bahnemann, D.W., Isr. J. Chem. 33, 115 (1993).CrossRefGoogle Scholar
20Kotov, N. A., Meldrum, F. C., and Fendler, J. H., J. Phys. Chem. 98, 8827 (1994).CrossRefGoogle Scholar
21Babonneau, F., Leaustic, A., and Livage, J., in Better Ceramics Through Chemistry III, edited by Brinker, C. J., Clark, D. E., and Ulrich, D.R. (Mater. Res. Soc. Symp. Proc. 121, Pittsburgh, PA, 1988), p. 317.Google Scholar
22Dagan, G. and Tomkiewicz, M., J. Phys. Chem. 97, 12651 (1993).CrossRefGoogle Scholar
23Södergren, S., Hagfeldt, A., Olsson, J., and Lindquist, S. E., J. Phys. Chem. 98, 5552 (1994).CrossRefGoogle Scholar
24Almgren, M., Holmström, B., and Tegnér, L., in Project Results: Solar Energy-Photochemical Conversion and Storage, edited by Claesson, S. and Engstrom, L. (The National Swedish Board for Energy and Development, 1977), p. II-6.Google Scholar
25Mokler, B.V., Wong, B. A., and Snow, M. J., Am. Ind. Hyg. Assoc. J. 40, 339 (1979).CrossRefGoogle Scholar