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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230nm单分散性ZrO_2亚微球;然后,以ZrO_2为前体,加入少量AgNO3,用物理方法将Sn2+离子吸附在ZrO_2表面,Ag+被还原成Ag0负载在ZrO_2表面合成Ag@ZrO_2晶种,加入甲醛合成核-壳纳米Ag@ZrO_2复合材料;最后用TEM、XRD和UV-Vis对制备的ZrO_2和Ag@ZrO_2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0.6mg/mL时,Ag@ZrO_2对S.aureus和E.coli的抑菌率分别为95.5%和99.0%。因此,Ag@ZrO_2作为理想的抗菌材料可以应用于日常生活和医疗实践中。
Firstly, sol-gel method was used to prepare monodisperse ZrO2 sub-microspheres with a diameter of about 230 nm by using tetrabutyl titanate as raw material. Then ZrO2 was added as a precursor and a small amount of AgNO3 was added. Sn2 + ions were physically adsorbed on Ag @ ZrO_2 was synthesized on the surface of ZrO_2 by adding Ag + onto the surface of ZrO_2. Ag + ZrO_2 composites were synthesized by the addition of formaldehyde. The prepared ZrO_2 and Ag @ ZrO_2 were characterized by TEM, XRD and UV-Vis. Characterization and study of its antibacterial activity against S.aureus and E.coli. The results showed that when Ag concentration was 0.6 mg / mL, the inhibitory rates of Ag @ ZrO 2 to S. aureus and E. coli were 95.5% and 99.0%, respectively. Therefore, Ag @ ZrO_2, as an ideal antibacterial material, can be applied to daily life and medical practice.