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 CuZnO-RGO nanocomposites was higher. Furthermore, Cu/ZnO-RGO nanocomposites exhibited excellent antibacterial properties against Escherichia coli and Staphylococcus aureus by destroying bacterial cell membrane, causing the outflow of bacterial content and preventing bacteria entering the obvious logarithmic growth phase within 24h. When the mass fraction of RGO was 15%, the usage of Cu/ZnO-RGO nanocomposites was 120μg/mL, and the treating time was 2h in the circulating cooling water, the antibacterial rate of Cu/ZnO nanocomposites reached 99.76%.
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