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- 2016
核-壳纳米Ag@ZrO2复合材料的制备及其抑菌性能
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Abstract:
首先,采用溶胶-凝胶法以锆酸四丁酯为原料制备了直径约为230 nm单分散性ZrO2亚微球;然后,以ZrO2为前体,加入少量AgNO3,用物理方法将Sn2+离子吸附在ZrO2表面,Ag+被还原成Ag0负载在ZrO2表面合成Ag@ZrO2晶种,加入甲醛合成核-壳纳米Ag@ZrO2复合材料;最后用TEM、XRD和UV-Vis对制备的ZrO2和Ag@ZrO2进行表征,并研究其对金黄色葡萄球菌(S.aureus)和大肠杆菌(E.coli)的抑菌性能。结果表明:当Ag浓度为0.6 mg/mL时,Ag@ZrO2对S.aureus和E.coli的抑菌率分别为95.5%和99.0%。因此,Ag@ZrO2作为理想的抗菌材料可以应用于日常生活和医疗实践中。 Monodisperse ZrO2 sub micrometer with diameters of about 230 nm were prepared firstly via sol-gel method using zirconium tetrabutoxide as raw material. Then, ZrO2 was treated as precursor, the Sn2+ ions were physically adsorbed on the surface of the ZrO2 with the addition of a small amount of AgNO3. The raw material seeds were loaded on the surface of the ZrO2 via reduction of Ag+ to Ag0. With the addition of formaldehyde, core-shell nano Ag@ZrO2 composites were synthesized. Finally, the as-prepared ZrO2 and Ag@ZrO2 were characterized by TEM, XRD and UV-Vis, and their antibacterial properties against Staphylococcus aureus(S.aureus) and Escherichia coli(E.coli) were also studied. The results indicate that the antibacterial rates against S.aureus and E.coli of the Ag@ZrO2 is 95.5% and 99.0%, respectively, when the Ag concentration is 0.6 mg/mL. Therefore, the Ag@ZrO2 can be used in daily life and medical practice as ideal antibacterial material. 国家自然科学基金重点项目(21373132)
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