Graphitized carbon coated nano-silver antibacterial microspheres as well as preparation method and application thereof

The invention relates to the technical field of antibacterial nano-materials, in particular to a graphitized carbon coated nano-silver antibacterial microsphere and a preparation method and application thereof, and the preparation method comprises the following steps: (1) preparing a silver nitrate aqueous solution; (2) adding carbon-containing water-soluble natural molecules into the silver nitrate aqueous solution to obtain a reaction solution; (3) transferring the reaction liquid into a reaction kettle for hydrothermal reaction; and (4) after the reaction is finished, separating a product, washing and drying to obtain the graphitized carbon coated nano-silver antibacterial microspheres. According to the preparation method provided by the invention, the carbon-containing water-soluble natural molecules are directly used as a reducing agent and a carbon source and are subjected to one-step hydrothermal reaction with the silver ions to prepare the graphitized carbon-coated nano-silver antibacterial microspher