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Journal of Zhejiang University SCIENCE B 2006 Vol.7 No.7 P.586~590

http://doi.org/10.1631/jzus.2006.B0586


Studies on characteristics of nanostructure of N-TiO2 thin films and photo-bactericidal action


Author(s):  XU Ming-fang, LIN Shan, CHEN Xin-man, PENG Yan-zhi

Affiliation(s):  Department of Bioengineering, Jinan University, Guangzhou 510632, China; more

Corresponding email(s):   xuxuxu20042005@126.com

Key Words:  Photocatalytic degradation, Photo-bactericidal action, N-TiO2 thin film


XU Ming-fang, LIN Shan, CHEN Xin-man, PENG Yan-zhi. Studies on characteristics of nanostructure of N-TiO2 thin films and photo-bactericidal action[J]. Journal of Zhejiang University Science B, 2006, 7(7): 586~590.

@article{title="Studies on characteristics of nanostructure of N-TiO2 thin films and photo-bactericidal action",
author="XU Ming-fang, LIN Shan, CHEN Xin-man, PENG Yan-zhi",
journal="Journal of Zhejiang University Science B",
volume="7",
number="7",
pages="586~590",
year="2006",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2006.B0586"
}

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%T Studies on characteristics of nanostructure of N-TiO2 thin films and photo-bactericidal action
%A XU Ming-fang
%A LIN Shan
%A CHEN Xin-man
%A PENG Yan-zhi
%J Journal of Zhejiang University SCIENCE B
%V 7
%N 7
%P 586~590
%@ 1673-1581
%D 2006
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.B0586

TY - JOUR
T1 - Studies on characteristics of nanostructure of N-TiO2 thin films and photo-bactericidal action
A1 - XU Ming-fang
A1 - LIN Shan
A1 - CHEN Xin-man
A1 - PENG Yan-zhi
J0 - Journal of Zhejiang University Science B
VL - 7
IS - 7
SP - 586
EP - 590
%@ 1673-1581
Y1 - 2006
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2006.B0586


Abstract: 
Pseudomonas aeruginosa strain (AS1.50) and Bacillus subtilis strain (AS1.439) from Ming lake were decomposed by photocatalytic nanostructure n-TiO2 thin films in a photo-reactor under UV irradiation. The different thickness nanostructure n-TiO2 thin films coated on mesh grid were prepared by sol-gel method and immobilized at 500 °C (films A) or 350 °C (films B) for 1 h in a muffle furnace. The results showed that n-TiO2 thin film B (8.18 nm thickness, 2.760 nm height and 25.15 nm diameter) has more uniform granular nanostructure and thinner flat texture than n-TiO2 thin film A (12.17 nm thickness, 3.578 nm height and 27.50 nm diameter). The bactericidal action of n-TiO2 thin film A and film B for Pseudomonas aeruginosa strain (AS1.50) and Bacillus subtilis varniger strain (AS1.439) were investigated in this work. More than 95% of photocatalytic bactericidal efficiency for Pseudomonas aeruginosa strain (AS1.50) and 75% for Bacillus subtilis strain (AS1.439) were achieved by using n-TiO2 thin films-B for 70~80 min of irradiation during the photo-bactericidal experimental process. The results indicated that the photo-induced bactericidal efficiency of n-TiO2 thin films probably depended on the characteristics of the films.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1] Jang, H.D., Kim, S.K., Kim, S.J., 2001. Effect of particle size and phase composition of titanium dioxide nanoparticles on the photocatalytic properties. J. Nano. Res., 3(2/3):141-147.

[2] Maness, P.C., Smolinski, S., Blake, D.M., Huang, Z., Wolfrum, E.J., Jacoby, W.A., 1999. Bactericidal activity of photocatalytic TiO2 reaction: toward an understanding of its killing mechanism. Appl. Environ. Microbio., 65(9):4094-4098.

[3] Matsunaga, T., Tomoda, R., Nakajima, T., Wake, H., 1985. Photochemical sterilization of microbial cells by semiconductor powders. FEMS Microbiology Letters, 29(1-2):211-214.

[4] Michael, R.P., Lindsey, R.E., Bertha, M.S., Prassas, M., 1999. An investigation of TiO2 photocatalysis for the treatment of water contaminated with metals and organic chemicals. Environ. Sci. Technol., 27:1776-1782.

[5] Trapalis, C.C., Keivanidis, P., Kordas, G., Zaharescu, M., Crisan, M., Szatvanyi, A., Gartner, M., 2003. TiO2 (Fe3+) nanostructured thin films with antibacterial properties. Thin Solid Films, 433(1-2):186-190.

[6] Zarzychi, J., Prassas, M., Phalippou, J., 1982. Study on drying stage of the mamoscale powder prepartion. J. Mater. Science, 17:3370-3375.

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