以钛酸四丁酯为钛源,聚乙二醇200为分散剂,采用溶胶-凝胶法制备一种新型的硫镧掺杂纳米TiO2抗菌材料.通过透射电镜和X射线衍射对纳米材料的微观结构进行表征分析,并检测硫、镧掺杂对纳米TiO2抗菌性能的影响.结果表明,所制备的硫镧掺杂TiO2为锐钛矿型纳米晶,硫、镧的掺杂导致TiO2的粒径变小.抑菌试验结果显示,在日光灯和紫外灯照射下,所制备的硫镧掺杂TiO2纳米材料具有良好的抗菌性能,在日光灯照射下抗大肠杆菌和金黄色葡萄球菌的最小抑菌浓度MIC值均≤250 mg/mL.通过与纯的TiO2对比,掺杂硫镧TiO2的抑菌效果更明显,且其抗菌性能与掺杂硫镧的含量成正相关.
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