Cu/ZnO-RGO的抗菌性能及应用

Antibacterial properties and application of Cu/ZnO-RGO nanocomposites

采用溶胶-凝胶法制备铜锌复合氧化物(Cu/ZnO),并将Cu/ZnO纳米粒子负载到还原氧化石墨烯(RGO)表面制备Cu/ZnO-RGO复合材料.对Cu/ZnO-RGO复合材料进行表征分析及抗菌性能考察,结果表明,Cu/ZnO纳米粒子成功负载在RGO表面,负载前后Cu/ZnO纳米粒子形态不发生改变,复合材料纯度较高.Cu/ZnO-RGO复合材料对大肠杆菌与金黄色葡萄球菌均有着优异的抗菌性能,可以破坏细菌细胞膜,导致细菌内容物流出,延长细菌进入对数生长期所需的时间.当RGO质量分数为15%?Cu/ZnO-RGO复合材料使用量为120μg/mL时,在循环冷却水系统中作用2h即可拥有96.76%的抗菌率.

The sol-gel method was used to prepare the copper and zinc composite oxide（Cu/ZnO）, nanoparticles of which were loaded on the surface of reduced graphene oxide（RGO） to synthesize Cu/ZnO-RGO nanocomposites. The characterization analysis of Cu/ZnO-RGO nanocomposites showed that the Cu/ZnO nanoparticles were loaded on the RGO surface successfully. The morphology of the Cu/ZnO nanoparticles did not change after the load and the purity of Cu ZnO-RGO nanocomposites was higher. Furthermore, Cu/ZnO-RGO nanocomposites exhibited excellent antibacterial properties against Escherichia coli and Staphylococcusaureus by destroying bacterial cell membrane, causing the outflow of bacterial content and preventing bacteria entering the obvious logarithmic growth phase within 24 h. When the mass fraction of RGO was 15%, the usage of Cu/ZnO-RGO nanocomposites was 120μg/mL, and the treating time was 2 h in the circulating cooling water, the antibacterial rate of Cu/ZnO nanocomposites reached 99.76%.