Studies on characteristics of nanostructure of N-TiO2 thin films and photo-bactericidal action.
- Author:
Ming-fang XU
1
;
Shan LIN
;
Xin-man CHEN
;
Yan-zhi PENG
Author Information
1. Department of Bioengineering, Jinan University, Guangzhou 510632, China. xuxuxu20042005@126.com
- Publication Type:Journal Article
- MeSH:
Anti-Bacterial Agents;
chemistry;
pharmacology;
Bacillus subtilis;
drug effects;
radiation effects;
Membranes, Artificial;
Nanostructures;
chemistry;
ultrastructure;
Nitrogen Compounds;
chemistry;
pharmacology;
Particle Size;
Photochemistry;
methods;
Pseudomonas aeruginosa;
drug effects;
radiation effects;
Surface Properties;
Titanium;
chemistry;
pharmacology;
Ultraviolet Rays
- From:
Journal of Zhejiang University. Science. B
2006;7(7):586-590
- CountryChina
- Language:English
-
Abstract:
Pseudomonas aeruginosa strain (AS1.50) and Bacillus subtilis strain (AS1.439) from Ming lake were decomposed by photocatalytic nanostructure N-TiO(2) thin films in a photo-reactor under UV irradiation. The different thickness nanostructure N-TiO(2) thin films coated on mesh grid were prepared by sol-gel method and immobilized at 500 degrees C (films A) or 350 degrees C (films B) for 1 h in a muffle furnace. The results showed that N-TiO(2) 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-TiO(2) thin film A (12.17 nm thickness, 3.578 nm height and 27.50 nm diameter). The bactericidal action of N-TiO(2) 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-TiO(2) 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-TiO(2) thin films probably depended on the characteristics of the films.
