南方农业学报2012，Vol.43Issue(9)：1373-1377,5.DOI:10.3969/j:issn.2095-1191.2012.09.1373
改性P25-S材料对大肠杆菌的抑菌效果
Antibacterial effect of modified P25-S(Nanometer TiO2)on Escherichia coli
摘要
Abstract
[Objective]P25 (Nanometer TiO2) was modified to improve its antibacterial rate against Escherichia coli by reducing motive energy for antibacterial activity of modified materials. [ Method ]S-modified P25 was prepared using grinding-calcining method. The best processing technology was selected by single factor and quadratic regression rotation design, using the antibacterial rate as main index. Besides, Escherichia coli surface morphology's before and after antibacterial treatment was observed. [Result]The optimal preparation technologies for modified P25-S were listed below: thiourea doping amount 3.2 g/g P25, calcining temperature 397℃ , and calcining time 3.5 h. In the visible light, antibacterial rate of modified P25-S reached 95%, which was 16% (absolute value) higher than unmodified P25. As a result, the surface of the modified P25-S wrinkled; parts of the E. Coli structure disintegrated and dissolved. [Conclusion] Through grinding -calcining, S -modified P25, containing proper doping amount of thiourea, could effectively improve the antibacterial rate of the modified materials; the process was simple, safe, pollution-free, and inexpensive, hence it could be massively applied in the production of antibacterial food package, antibacterial package apparatus, etc.关键词
P25(纳米TiO2)/改性P25-S材料/硫脲/大肠杆菌/抑菌率/研磨—煅烧法Key words
P25 (Nanometer TiO2) /P25-S/thiurea/ Escherichia coli/ antibacterial rate/ grinding-calcining分类
通用工业技术引用本文复制引用
张静,宋贤良,欧春凤,李穗燕..改性P25-S材料对大肠杆菌的抑菌效果[J].南方农业学报,2012,43(9):1373-1377,5.基金项目
广东省科技计划项目(2010B020312007) （2010B020312007）
华南理工大学淀粉与植物蛋白深加工教育部工程研究中心开放项目 （）
