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CLC number: Q89

On-line Access: 2024-08-27

Received: 2023-10-17

Revision Accepted: 2024-05-08

Crosschecked: 0000-00-00

Cited: 14

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Citations:  Bibtex RefMan EndNote GB/T7714

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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



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.

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