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

Journal of Zhejiang University SCIENCE B volume 7, pages 586–590 (2006)Cite this article

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 irradition. 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.

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Affiliations

  1. Department of Bioengineering, Jinan University, Guangzhou, 510632, China

    Xu Ming-fang & Lin Shan

  2. Institute of Aquatic Ecoscience, Jinan University, Guangzhou, 510632, China

    Chen Xin-man & Peng Yan-zhi

Authors
  1. Xu Ming-fang
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  2. Lin Shan
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  3. Chen Xin-man
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  4. Peng Yan-zhi
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Additional information

Project (No. 2KM02501G) supported by the Program of Science and Technology Fund of Guangdong Province, China

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Xu, Mf., Lin, S., Chen, Xm. et al. Studies on characteristics of nanostructure of N-TiO2 thin films and photo-bactericidal action. J. Zhejiang Univ. - Sci. B 7, 586–590 (2006). https://doi.org/10.1631/jzus.2006.B0586

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  • DOI: https://doi.org/10.1631/jzus.2006.B0586

Key words

  • Photocatalytic degradation
  • Photo-bactericidal action
  • N-TiO2 thin film

CLC number

  • Q89