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采用溶胶-凝胶法对TiO2进行Ce及Zn单一和共掺杂改性。以金葡萄球菌、大肠杆菌和白念珠菌为菌种,研究组分对材料的可见光抗菌活性影响。运用X射线衍射(XRD)、透射电子显微镜(TEM)、比表面仪(BET)、傅里叶变换红外光谱(FT-IR)和紫外-可见漫反射光谱(UV-Vis-DRS)等测试手段对样品的结构进行表征。实验结果表明,掺杂改性抗菌剂中适量Ce组分的作用,在于通过抑制抗菌剂的晶粒长大和拓展光响应范围等方面,增进抗菌剂的光催化性能。掺杂抗菌剂中适量Zn组分的作用在于提高材料的光催化抗菌性能。Zn、Ce共掺杂TiO2纳米材料表现出良好的协同抗菌效果,协同效应因子(SEF)>0。
Sol-gel method was used to modify Ce and Zn single and co-doped TiO2. Staphylococcus aureus, Escherichia coli and Candida albicans were used to study the effect of components on the visible light antibacterial activity. The microstructure and mechanical properties were characterized by XRD, TEM, BET, FT-IR and UV-Vis-DRS The structure of the sample was characterized. The experimental results show that the effect of appropriate amount of Ce component in the modified antibacterial agent is to increase the photocatalytic activity of the antibacterial agent by inhibiting the crystal growth of the antibacterial agent and expanding the light response range. Doping antibacterial agents in the amount of Zn component role is to improve the photocatalytic antibacterial properties of the material. Zn, Ce co-doped TiO2 nanomaterials showed good synergistic antimicrobial effect with synergistic effect factor (SEF)> 0.