Antibacterial Activity of TiO₂/Ti Composite Photocatalyst Films Treated by Ultrasonic Cleaning

Yun Lu, Lian Hao, Yutaka Hirakawa, Hiromasa Sato

Graduate School & Faculty of Engineering Chiba University.
Graduate School Chiba University.

DOI: 10.4236/ampc.2012.24B003                

Abstract

In this work, TiO₂/Ti composite films were fabricated by 2-setp MCT and the following high temperature oxidation. Antibacterial activity of the composite films treated by ultrasonic cleaning to increase the performance reliability was examined. The prepared TiO₂/Ti composite films showed high photocatalytic activity in the degradation of methylene blue solution. It is obvious that  TiO₂/Ti composite films have antibacterial activity under UV irradiation.

Keywords

Mechanical Coating Technique; TiO₂/Ti Composite Film; Photocatatlyst; Antibacterial Activity

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	T. Ochiai and A. Fujishima, “Photoelectrochemical properties of TiO2 photocatalyst and its applications for environmental purification," J. Photochem. Photobiol. C: Photochem. Rev., 2012, in press.
[2]	K. Nakata, T. Ochiai, T. Murakami and A. Fujishima, "Photoenergy conversion with TiO2 photocatalysis: New materials and recent applications," Electrochim. Acta, 2012, in press.
[3]	M.N. Chong, B. Jin, C.W.K. Chow and C. Saint, "Recent developments in photocatalytic water treatment technology: A review," Water Research, vol.44, pp.2997-3027, 2010.
[4]	I.M. Arabatzis, T. Stergiopoulos, D. Andreeva, S. Kitova, S.G. Neophytides, P. Falaras, "Characterization and photocatalytic activity of Au/TiO2 thin films for azo-dye degradation," J. Catal., vol.220, pp. 127-135, 2003.
[5]	M. Miyauchi, A. Nakajima, T. Watanabe and K. Hashimoto, " Photocatalysis and photoinduced hydrophilicity of various metal oxide thin films," Chemistry of Materials, vol.14, pp. 2812-2816, 2002.
[6]	C.C. Chen, W.J. Yang and C.Y. Hsu, "Fabrication of electron passes in nano-TiO2 layer by high-velocity oxy-fuel method for dye-sensitized solar Cells," Superlattices and Microstructure, vol.46, pp. 461-468 (2009).
[7]	A. Mills, N. Elliott, I.P. Parkin, S.A. O’Neill and R.J. Clark, "Novel TiO2 CVD films for semiconductor photocatalysis," J. Photochem. Photobi. A: Chemistry, vol.151, pp. 171-179, 2002.
[8]	C. Trapalis, N. Todorova, M. Anastasescu, C. Anastasescu, M. Stoica, M. Gartner, M. Zaharescu and T. Stoica, "Atomic force microscopy study of TiO2 sol–gel films thermally treated under NH3 atmosphere," Thin Solid Films, vol.517, pp. 6243-6247, 2009.
[9]	Y. Lu, H. Yoshida, H. Nakayama, L. Hao, M. Hirohashi, "Formation of TiO2/Ti composite photocatalyst film by 2-step mechanical coating technique," Materials Science Forum, vol. 675-677, pp. 1229-1232, 2011.
[10]	Y. Lu, L. Hao, K. Toh, H. Yoshida, "Fabrication of TiO2/Cu composite photocatalyst thin film by 2-step Mechanical Coating Technique and its photocatalytic activity," Advanced Materials Research, vol.415-417, pp. 1942-1948, 2012.
[11]	H. Yoshida, Y. Lu, H. Nakayama, M. Hirohashi, "Fabrication of TiO2 film mechanical coating technique and its photocatalytic activity," Journal of Alloys and Compounds, vol.475, pp. 383-386, 2009.
[12]	L. Hao, Y. Lu, H. Asanuma, J. Guo, "The influence of the processing parameters on the formation of iron thin films on alumina balls by mechanical coating technique," Journal of Materials Processing Technology, vol.212, pp. 1169-1176, 2012.
[13]	K. Sunada, T. Watanabe and K. Hashimoto, "Studies on photokilling of bacteria on TiO2 thin film," J. Photochem. Photobio. A: Chemistry, vol.156, pp.227-233, 2003.
[14]	K.J. Shieh, M. Li, Y.H. Lee, S. D. Sheu, Y.T. Liu and Y.C. Wang, "Antibacterial performance of photocatalyst thin film fabricated by defsction effect in visible light," Nanomedicine: Nonatechnology, Biology and Medicne, vol.2, pp.121-126, 2006.