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 with titanium tetrachloride as the titanium source and tertbutanol as the solvent via a nonaqueous solgel method. The material was characterized by Xray diffraction (XRD),fourier transform infrared spectroscopy (FTIR),scanning electron microscopy (SEM),transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM),respectively. Its antibacterial activity against escherichia coli and bacillus subtilis was investigated by the qualitative colony counting method. The results suggest that the TiO2 nanoparticles have the advantages of small particle size and an excellent antibacterial performance,the antibacterial rate to escherichia coli and bacillus subtilis is over 93%. Meanwhile,the antibacterial mechanism of TiO2 nanoparticles was investigated and the development in the future of titania photocatalytic materials was prospected.