Skip to main content
×
×
Home

Photo-oxidatively self-cleaning transparent titanium dioxide films on soda lime glass: The deleterious effect of sodium contamination and its prevention

  • Y. Paz (a1) and A. Heller (a1)
Abstract

In the context of photocatalytically self-cleaning windows and windshields, clear, abrasion resistant, thin (60 ± 10 nm) photocatalytic films of TiO2 were formed by a sol-gel process on (a) soda lime glass, (b) the proton-exchanged surface of soda lime glass, and (c) fused silica. The hypothesis that diffusion of sodium oxide from the soda lime glass into the titanium dioxide layer during the calcination step causes the lower photoefficiency in films on glass was tested and proven. At high concentration sodium prevented formation of the photoactive anatase phase and, at low concentration, introduced surface and bulk recombination centers. Sodium transport was efficiently blocked by a thin layer at the interface of proton-exchanged (“hydrogen”) glass and nascent TiO2, formed at 400 °C of a poly(titanyl acetylacetonate) TiO2 precursor. The sodium transport blocking layer did not form and the highly photocatalytic film was not obtained when the TiO2-precursor film was applied to glass that was not proton exchanged. Furthermore, only a much less effective sodium transport blocking layer was formed on glass that was proton-exchanged, but was calcined at 400 °C prior to application of the TiO2 precursor layer, showing that the sodium depleted glass surface, by itself, was a less effective barrier against sodium transport than the interfacial product of hydrogen glass and the TiO2 precursor.

Copyright
References
Hide All
1. (a) Blake, D. M., Bibliography of Work on the Photocatalytic Removal of Hazardous Compounds from Water and Air, National Renewable Energy Laboratory, Golden, CO, May 1994. (b) O. Legrini, E. Oliveros, and M. A. Braun, Chem. Rev. 93, 671 (1993). (c) M. A. Fox and M. T. Dulay, Chem. Rev. 93, 267 (1993). (d ) Photocatalytic Purification and Treatment of Water and Air, edited by Ollis, D. F. and Al-Ekabi, H. (Elsevier, Amsterdam, 1993). (e) Proceedings of The First International Conference on TiO2 Photocatalytic Purification and Treatment of Air and Water; London, Ontario, Canada (1992). ( f) Proceedings of The Second International Conference on TiO2 Photocatalytic Purification and Treatment of Air and Water; London, Ontario, Canada (1992).
2.Paz, Y., Luo, Z., Rabenberg, L., and Heller, A., J. Mater. Res. 10, 2842 (1995).
3.Cui, H., Shen, H-S., Gao, Y-M., Dwight, K., and Wold, A., Mater. Res. Bull. 28, 195 (1993).
4.Fukayama, S., Kawamura, K., Saito, T., Iyoda, T., Hashimoto, K., and Fujishima, A., the 187th Electrochemical Society Meeting, 95-1, Reno, NV (1995).
5.Xu, W. W., Kershaw, R., Dwight, K., and Wold, A., Mater. Res. Bull. 25, 1385 (1990).
6.Pulker, H. K., “Coating on Glass,” Thin Films Science and Technology (Elsevier, Amsterdam, 1984), Vol. 6.
7.Keesmann, I., Z. Anorgan. Allgem. Chem. 30, 346 (1966).
8.Bach, H. and Schroeder, H., Thin Solid Films 1, 255 (1967/1968).
9.Bahnemann, D. W., Isr. J. Chem. 33, 115 (1993).
10.Kotov, N. A., Meldrum, F. C., and Fendler, J. H., J. Phys. Chem. 98, 8827 (1994).
11.Gopel, W., Anderson, J. A., Frankel, D., Jaehnig, M., Phillips, K., Schafer, J. A., and Rocker, G., Surf. Sci. 139, 333 (1984).
12.Wang, L-Q., Baer, D. R., and Engelhard, M. H., Surf. Sci. 320, 295 (1994).
13.Wagner, C. D., Riggs, W. M., Davis, L. E., Moulder, J. F., and Muilenberg, G. E., Handbook of X-Ray Photoelectron Spectroscopy (Perkin-Elmer, Eden Prairie, MN).
14.Pantano, C. G., Jr., Dove, D. B., and Onoda, G. Y., Jr., Non-Cryst. Solids 19, 41 (1975).
15.Williams, E. L., Glass Industry 43, 186 (1962).
16.Douglas, R. W. and Isard, J. O., J. Soc. Glass Technol. 33, 289 (1949).
17.Boccuti, M. R., Rao, K. M., Zecchina, A., Leofanti, G., and Petrini, G., in Structure and Reactivity of Surfaces, edited by Morterra, C., Zecchina, A., and Costa, G. (Elsevier, Amsterdam, 1989), pp. 133145.
18.Mirajkar, S. P., Thangaraj, A., and Shiralkar, V. P., J. Phys. Chem. 96, 3073 (1992).
19.Schroeder, H., Phys. Thin Films 5, 87 (1969).
20.Formenti, M., Juillet, F., Meriaudeau, P., and Teichner, S. J., Chem. Technol. 1, 680 (1971).
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Materials Research
  • ISSN: 0884-2914
  • EISSN: 2044-5326
  • URL: /core/journals/journal-of-materials-research
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 140 *
Loading metrics...

Abstract views

Total abstract views: 671 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 23rd April 2018. This data will be updated every 24 hours.