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采用溶胶-凝胶技术,以钛酸正丁酯为前驱体,于450~700℃的空气气氛中煅烧3h,分别制得了有、无SiO2包膜的掺杂银、镍金属离子的复合纳米TiO2抗菌粉体。采用TG-DSC、XRD、SEM等方法对产物进行表征,并选用大肠杆菌、枯草芽孢杆菌为受试菌种,采用抑菌圈实验对粉体抗菌性进行检测。结果表明,在该实验条件下制备的纳米TiO2为锐钛矿型,通过包覆SiO2能有效地减小SiO2的粒度,防止团聚的产生,粉体抗菌性能良好,无SiO2包膜的抗菌粉体抑菌效果优于有包膜的抗菌粉体,在700℃下煅烧的抗菌粉体抑菌效果最好。
Using sol-gel technique, n-butyl titanate was used as a precursor and calcined at 450-700 ℃ for 3 h in air atmosphere to prepare nano-TiO2 with or without SiO2 coating doped with silver and nickel ions respectively Antibacterial powder. The products were characterized by TG-DSC, XRD and SEM. Escherichia coli and Bacillus subtilis were selected as the tested strains, and the antibacterial activity of the powder was tested by inhibition zone experiment. The results show that under the experimental conditions, the prepared nano-TiO2 is anatase type, which can effectively reduce the grain size of SiO2 and prevent the agglomeration by coating SiO2, and has good antibacterial property and non-SiO2 coated antibacterial powder The bacteriostatic effect is better than the coated antibacterial powder. The antibacterial powder calcined at 700 ℃ has the best antibacterial effect.