【作者】 陶振华； 张海丽； 韩德新； 周雅文； 赵华； 田福祯；

【Author】 TAO Zhen-hua~1 ZHANG Hai-li~2 HAN De-xin~2 ZHOU Ya-wen~2 ZHAO Hua~1 TIAN Fu-zhen~2 (1.Tianjin Industrial Microbiology Key-Lab,College of Biotechnology,Tianjin University of Science & Technology,Tianjin 300457,China; 2.College of Science,Tianjin University of Science & Technology,Tianjin 300457,China)

【机构】 天津科技大学生物工程学院,天津工业微生物重点实验室； 天津科技大学理学院；

【摘要】 采用四氯化钛自生晶种水解法制备了纳米 TiO₂,通过在水解过程中引入硝酸银制得载银纳米 TiO₂．对载银前后的纳米 TiO₂进行了 XRD 和 TEM 表征．XRD 图谱表明,纳米 TiO₂属于锐钛矿晶型结构, 水解过程中加入硝酸银得到纳米 TiO₂与氯化银的复合体（AgCl/TiO₂）．TEM 照片显示,纳米 TiO₂样品为分散较好的20～30nm 之间的粒子,而载银后的复合物粒子明显增大,有轻度的团聚发生．采用抑菌环、悬浮液浊度法测定了载银前后纳米 TiO₂的抗菌性能,结果表明,AgCl/TiO₂抗菌材料对金黄色葡萄球菌有明显的抑菌效果,其最小抑菌浓度为750mg/L．达到日本制定的“银等无机抗菌剂自主规格及其抗菌实验法”规定的＜ 800mg/L 指标．更多还原

【Abstract】 Nano-titania was prepared by spontaneous seed crystal thermo-hydrolysis of industrial aqueous TiCl₄ solution, and Ag-embedded nano-titania was synthesized through adding AgNO₃ during the process of thermo-hydrolysis of TiCl₄. XRD and TEM characterization of these two samples were performed.The XRD results suggest that nano-titania prepared belongs to anatase structure,and the Ag-embedded nano-titania belongs to the complex of nano-titania and AgCl.The TEM pictures illuminates that the particles of titania is about 20-30nm and well dispersed.However,the particles of Ag-embedded nano-titania are obviously bigger than those of pure titania.The antibacterial activity of Ag-embedded nano-titania was studied,and the results suggest that it possess distinct antibacterial ability to staphylococcus aureus with the value of minimal inhibitory concentration（MIC）as 750mg/L,which is smaller than the standard value（800g/L）of inorganic antibacterial in Japan.更多还原