Physics and mathematics
THE EFFECT OF PHOTOINDUCED SUPERHYDROPHILICITY OF METAL OXIDE SURFACES
1. Saint-Petersburg State University
2. Dimitrovgrad Branch of National Research Nuclear University MEPHI
| p. 1959-1962
In this review, the analysis of literature on fundamental exploration of the photoinduced superhydriphilicity phenomenon on the metal oxide surfaces has been presented as from its discovery in 1997 to nowadays. It was figured out that main difficulties in research are characterization of initial state and poor reproducibility of the results presented by different research groups. Three dominating in literature hypothesized mechanisms of the effect have been reviewed. It was concluded that there is no common and experimentally supported theory on the origin of photoinduced superhydrophility effect yet; the conclusions made by different authors contradict to each other. It was clearly shown that electronic photoexcitation of solids plays an important role at the first stages of surface photoinduced hydrophilic conversion. Also, it was shown the necessity to take into account the existence of poly-layered hydrate coverage on the surface of nanocoatings and the surface energy alteration during thermodynamic equilibrium stating under any influence, including UV irradiation. At the same time, subsequent stages of mechanism still remain elusive.
Keywords: photoinduced superhydrophilicity, heterogeneous catalysis, photoactive materials, titanium dioxide, spectral selectivity, surface acidity
References1. Emeline A.V., Rudakova A.V., Sakai M., Murakami T., Fujishima A. Factors affecting UV-induced superhydrophilic conversion of TiO2 surface, J. Phys. Chem. C., 2013. Vol. 117, no. 23, pp. 12086–12092.
2. Emeline A.V., Rudakova A.V., Ryabchuk V.K., Serpone N. Photostimulated reactions at the surface of wide band-gap metal oxides (ZrO2 and TiO2): Interdependence of rates of reactions on pressure−concentration and on light intensity, J. Phys. Chem. B., 1998. Vol. 102, no. 52, pp. 10906−10916.
3. Emeline A.V., Kuzmin G.N., Purevdorj D., Ryabchuk V.K., Serpone N. Spectral dependencies of the quantum yield of photochemical processes on the surface of wide band gap solids. 3. Gas/solid systems, J. Phys. Chem. B., 2000. Vol. 104, no. 14, pp. 2989–2999.
4. Emeline A.V., Ryabchuk V.K., Serpone N. Factors affecting the efficiency of a photocatalyzed process in aqueous metal-oxide dispersions: Prospect for distinguishing between the two kinetic models, J. Photochem. Photobiol. A.,2000. Vol. 133, no. 1-2, pp. 89-97.
5. Emeline A.V., Sakai M., Murakami T., Fujishima A. Factors affecting surface hydrophilicity of TiO2 nanocoatings , 3d Int. Conf. Semiconductor Photochemistry: Book of Abstracts on the 3d Int. Conf. SP3. (Glasgow, Scotland, UK, April 2010). Glasgow, 2010, pp. 11, 115.
6. Emeline A.V., Rudakova A.V., Oparicheva U.G. Effects of various factors on superhydrophilicity and optical parameters of titania nanofilms, 4th Int. Conf. Semiconductor Photochemistry: Book of Abstracts on the 4th Int. Conf. SP4. – SP4. (Prague, Czech Republic, June 23–27 2013). Prague, 2013, pp. KL6. 44.
7. Fujishima A., Zhang X., Tryk D.A. TiO2 photocatalysis and related surface phenomena, Surf. Sci. Rep., 2008. Vol. 63, no. 12, pp. 515–582.
8. Liu B., Wen L., Zhao X. The surface change of TiO2 thin film induced by UV illumination and the effects on UV-Vis transmission spectra, Appl. Surf. Sci. 2008. Vol. 255, no. 5, iss. 2, pp. 2752–2758.
9. Mezhenny S., Maksymovych P., Thompson T.L., Diwald O., Stahl D., Walck S.D., Yates J.T., Jr. STM studies of defect production on the TiO2(110)-(1×1) and TiO2(110)-1×2) surfaces induced by UV irradiation, Chem. Phys. Lett., 2003. Vol. 369, no. 1–2, pp. 152–157.
10. Miyauchi M., Kieda N., Hishita S., Mitsuhashi T., Nakajima A., Watanabe T., Hashimoto K. Reversible wettability control of TiO2 surface by light irradiation , Surf. Sci. 2002. Vol. 511, no. 1–3, pp. 401–407.
11. Miyauchi M., Nakajima A., Fujishima A., Hashimoto K. Watanabe T. Photoinduced surface reaction on TiO2 and SrTiO3 films: Photocatalytic oxidation and photoinduced hydrophilicity, Chem. Mater., 2000. Vol. 12, no. 1, pp. 3–5.
12. Miyauchi M., Nakajima A., Watanabe T., Hashimoto K. Photocatalysis and photoinduced hydrophilicity of various metal oxide thin films, Chem. Mater., 2002. Vol. 14, no. 6, pp. 2812–2816.
13. Nosaka A.Y., Kojima E., Fujiwara T., Yagi H., Akutsu H., Nosaka Y. Photoinduced changes of adsorbed water on a TiO2 photocatalytic film as studied by 1H NMR spectroscopy, J. Phys. Chem. B., 2003. Vol. 107, no. 44, pp. 12042–12044.
14. Ohtsu N., Masahashi N., Mizukoshi Y., Wagatsuma K. Hydrocarbon decomposition on a hydrophilic TiO2 surface by UV irradiation: Spectral and quantitative analysis using in-situ XPS technique, Langmuir, 2009. Vol. 25, no. 19, pp. 11586–11591.
15. Sakai N., Fujishima A., Watanabe T., Hashimoto K. Enhancement of the photoinduced hydrophilic conversion rate of TiO2 film electrode surfaces by anodic polarization, J. Phys. Chem. B., 2001. Vol. 105, no. 15, pp. 3023–3026.
16. Sakai N., Fujishima A., Watanabe T., Hashimoto K. Quantitative evaluation of the photoinduced hydrophilic conversion properties of TiO2 thin film surfaces by the reciprocal of contact angle, J. Phys. Chem. B., 2003. Vol. 107, no. 4, pp. 1028–1035.
17. Soria J., Sanz J., Sobrados I., Coronado J.M., Maira J., Hernandez-Alonso M.D., Fresno F. FTIR and NMR study of the adsorbed water on nanocrystalline anatase, J. Phys. Chem. C., 2007. Vol. 111, no. 28, pp. 10590–10596.
18. Sun R-D., Nakajima A., Fujishima A., Watanabe T., Hashimoto K. Photoinduced surface wettability conversion of ZnO and TiO2 Thin Films, J. Phys. Chem. B., 2001. Vol. 105, no. 10, pp. 1984–1990.
19. Szczepankiewicz S.H., Colussi A.J., Hoffmann M. R. Infrared spectra of photoinduced species on hydroxylated titania surfaces, J. Phys. Chem. B., 2000. Vol. 104, no. 42, pp. 9842–9850.
20. Szczepankiewicz S.H., Moss J.A., Hoffmann M.R. Electron traps and the Stark effect on hydroxylated titania photocatalysts, J. Phys. Chem. B., 2002. Vol. 106, no. 31, pp. 7654–7658.
21. Takeuchi M., Sakamoto K., Marta G., Coluccia S., Anpo M. Mechanism of photoinduced superhydrophilicity on the TiO2 photocatalyst surface, J. Phys. Chem. B., 2005. Vol. 109, no. 32, pp. 15422–15428.
22. Uosaki K., Yano T., Nihonyanagi S. Interfacial water structure at as-prepared and UV-induced hydrophilic TiO2 surfaces studied by sum frequency generation spectroscopy and quartz crystal microbalance, J. Phys. Chem. B., 2004. Vol. 108, no. 50, pp. 19086–19088.
23. Wang R., Hashimoto K., Fujishima A., Chikuni M., Kojima E., Kitamura A., Shimohigoshi M., Watanabe T. Light-induced amphiphilic surfaces, Nature, 1997. Vol. 388, no. 6641, pp. 431–432.
24. Wang R., Hashimoto K., Fujishima A., Chikuni M., Kojima E., Kitamura A., Shimohigoshi M., Watanabe T. Photogeneration of highly amphiphilic TiO2 surfaces, Adv. Mater., 1998. Vol. 10, no. 2, pp. 135–138.
25. White J.M., Szanyi J., Henderson M.A. The photon-driven hydrophilicity of titania: A model study using TiO2(110) and adsorbed trimethyl acetate, J. Phys. Chem. B., 2003. Vol. 107, no. 34, pp. 9029–9033.
26. Yan X., Abe R., Ohno T., Toyofuku M., Ohtani B. Action Spectrum analyses of photoinduced superhydrophilicity of titania thin films on glass plates, Thin Solid Films, 2008. Vol. 516, no. 17, pp. 5872–5876.