纳米TiO_2光半导体溶胶对植物病原微生物的抗菌性能  

Antibacterial effect of nano-TiO_2 semiconductor sol on plant bacterial diseases

作　　者：李玲玲[1] 崔海信[1] 张萍[1] 

机构地区：[1]中国农业科学院农业环境与可持续发展研究所,北京100081

出　　处：《农业工程学报》2008年第8期223-226,共4页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家"863"计划资助项目(2006AA10A203);国家"973"计划资助项目(2004CB719704)

摘　　要：鉴于纳米二氧化钛半导体材料在医学、环保领域对细菌、病毒等微生物长效、安全、无残留的成功抑制,本试验探讨纳米二氧化钛半导体材料在植物领域对植物病原微生物的杀灭与抑制作用。通过溶胶凝胶法合成纳米TiO2半导体溶胶材料,无菌瓷板涂布成膜,黑光照射,统计病原菌存活数、相对抗菌率,鉴定TiO2溶胶的抗菌效果。结果表明,该溶胶的平均粒径为30.6nm,为锐钛矿型,分散度、稳定度良好,成膜与附着力良好。抗菌鉴定表明,3次均匀涂布成膜的抗菌瓷板效果最好,涂布高于3次,膜易脱落;对在3次成膜瓷板的相对菌落存活数统计表明,与对照相比,TiO2溶胶对植物细菌性病原菌具有显著的抗灭与抑制效果,延长照射时间,抗菌能力增强;相对抗菌率表明,延长光照为24h,相对抗菌率为100%,对各菌种的抗菌率无差异。因此,TiO2半导体溶胶材料是一种强效的、广谱的新型绿色环保抗菌剂。Nanometer TiO2 photosemiconductor, as a safe antibacterial chemical with a long-effect, has been widely applied to medicine and environmental protection. The authors studied the effects of TiO2 sol on plant pathogens. Nano-TiO2 semiconductor sol was prepared referring to the method developed by Itinose, by which a successive and transparent antibacterial membrane was formed on aseptic tiles, Wood＇s lamp radiation, statistics antibacterial ratios, to detect antibacterial effectiveness. The results show that the nano-TiO2 was anatase, and mean diameter was 30.6 nm, dispersity, stability and adhesive power were good. The antibacterial experiments show that the effect of the three antibacterial membranes is the best; when the antibacterial membrane is above three, it is easy exfoliated; compared with the blank, nano-TiO2 semiconductor sol has excellent antibacterial effect on plant pathogens, and as the time lasts, the antibacterial rate increases. The results of relative antibacterial rate show that when the illumination lasts for 24 h, the relative antibacterial rate reaches 100%, and there is no discrepancy for different strains. So nano-TiO2 semiconductors sol is a potent and broad spectrum antibacterial.

关 键 词：纳米 二氧化钛 植物病原菌 溶胶材料 抗菌性能 抗菌剂 

分 类 号：TB383[一般工业技术—材料科学与工程] S432[农业科学—植物病理学]