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采用溶胶-凝胶法,在不同的焙烧温度下合成锌/铈共掺杂二氧化钛纳米材料。用X射线衍射(XRD)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)和紫外-可见漫反射光谱(DRS)对样品进行了表征。采用抑菌环法,以大肠杆菌为实验菌种,对Zn/Ce-TiO2纳米材料抗菌性能进行检测。结果表明:样品的结晶度和晶相完全取决于焙烧温度的高低;部分锌进入二氧化钛晶格中,其余掺杂离子以CeO2和Zn2Ti3O8形式存在;与暗态下相比,在可见光激发下,Zn/Ce-TiO2纳米材料具有超强的抗菌性。对锌/铈共掺杂作用机制进行了深入探讨。
Zinc / cerium codoped titanium dioxide nanomaterials were synthesized by sol-gel method at different calcination temperatures. The samples were characterized by XRD, TEM, XPS and DRS. The antibacterial property of Zn / Ce-TiO2 nanomaterials was tested by using the bacteriostatic method and using Escherichia coli as experimental bacteria. The results show that the crystallinity and crystal phase of the sample are completely dependent on the calcination temperature. Part of zinc enters into the crystal lattice of titanium oxide and the other ions exist in the form of CeO2 and Zn2Ti3O8. Under visible light excitation, Zn / Ce-TiO2 nanomaterials have superb antibacterial properties. The zinc / cerium co-doping mechanism was discussed in depth.