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以四氯化钛为钛源,叔丁醇为溶剂,采用非水溶胶-凝胶法制备了TiO2纳米颗粒,利用红外光谱(FT-IR)、X-射线衍射(XRD)、扫描电镜(SEM)和透射电镜(TEM)等技术手段对其进行了结构表征。基于定量菌落计数法考查了TiO2纳米颗粒对大肠杆菌和枯草杆菌的抑菌特性。结果表明,通过该方法合成的TiO2纳米颗粒粒径小,对这两种细菌的抑菌率都在93%以上,具有良好的抑菌效果。同时,简要分析了纳米TiO2抑菌机理,并对TiO2光催化材料的未来发展趋势进行了展望。
TiO2 nanoparticles were prepared by non-aqueous sol-gel method using titanium tetrachloride as titanium source and tert-butanol as solvent. The properties of the prepared nanoparticles were characterized by means of FT-IR, XRD and SEM ) And transmission electron microscopy (TEM) and other technical means to its structural characterization. The antibacterial properties of TiO2 nanoparticles against Escherichia coli and Bacillus subtilis were investigated based on the quantitative colony counting method. The results show that the TiO2 nanoparticles synthesized by this method have small particle size and the antibacterial activity of these two kinds of bacteria is over 93%, which has good antibacterial effect. At the same time, the antibacterial mechanism of nano-TiO2 was briefly analyzed, and the future development trend of TiO2 photocatalytic material was prospected.