▎ 摘　　要

NOVELTY - A zinc oxide/silver/graphene nanocomposite material is prepared by simultaneously dispersing silver and zinc oxide nanoparticles on a graphene sheet surface. A charge transfer mechanism of graphene and surface plasmon resonance effect between silver and zinc oxide are used to synergize antibacterial properties. The graphene is used as template to disperse zinc oxide and silver nanoparticles for adsorption of bacterial cells in close contact with zinc oxide and silver nanoparticles. The electrical conductivity is used to transfer photogenerated electrons, and promote separation of electron-hole pairs and zinc oxide photocatalytic process. The silver nanoparticles are sterilized by inherent antibacterial property. The surface plasmon resonance effect promotes zinc oxide absorption efficiency to light. The rapid transfer of electrons achieves electron-hole pair separation. The zinc oxide nanoparticles produce free radical antibacterial property in water under natural light. USE - Zinc oxide/silver/graphene nanocomposite material. ADVANTAGE - The zinc oxide/silver/graphene nanocomposite material simultaneously realizes the loading of zinc oxide and silver nanoparticles on the graphene sheets in one step preparation process, effectively controls the size of nanoparticles, and is prepared by simple, convenient and environmentally-friendly processes. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of zinc oxide/silver/graphene nanocomposite material, which involves (1) dissolving graphene oxide in ethanol to prepare a suspension with a concentration of 0.5 mg/mL, and ultrasonically processing to uniformly disperse, (2) dissolving zinc acetate hexahydrate in ethanol to prepare zinc acetate solution with concentration of 10-14 mg/mL, mixing the zinc acetate solution with graphene oxide suspension, magnetically stirring at room temperature, and ultrasonically processing to obtain zinc ion/graphene oxide suspension, where the volume ratio of zinc acetate solution and graphene oxide suspension is 1:4-1:8, (3) preparing sodium hydroxide as 2-10 mg/mL aqueous solution, dripping to zinc ion/graphene oxide suspension, and stirring to obtain mixed solution, where the volume ratio of sodium hydroxide solution and zinc ion/graphene oxide suspension is 1:8-1:16, (4) dissolving silver nitrate in ethanol to prepare 2-6 mg/mL silver nitrate ethanol solution, dripping in the mixed solution under the condition of stirring, magnetically stirring at room temperature, and ultrasonically processing to obtain zinc ion/sodium hydroxide/silver ion/graphene oxide suspension, where the volume ratio of silver nitrate solution and mixed solution is 1:8-1:16, and (5) transferring the zinc ion/sodium hydroxide/silver ion/graphene oxide suspension to a high-pressure reactor, heat-preserving at 180 degrees C for 24 hours, naturally cooling, centrifuging, and freeze-drying.