▎ 摘　　要

NOVELTY - Graphene-loaded core-shell nanoparticle material, is claimed. The carrier of the material is graphene doped with nitrogen atoms. The metal component supported by the material is at least one of cobalt, nickel, iron, and molybdenum transition metal components. USE - Used as graphene-loaded core-shell nanoparticle material. ADVANTAGE - The method cleverly uses special functions of nitrogen-doped graphene material combined with the impregnation and roasting process to construct core-shell structure nano-particles with the same components as the core and shell on the surface of graphene, constructs dense interphase core-shell structure nano-particles composed of cobalt oxides on the surface of graphene, and is simple. The core-shell nano-particle has same components and dense phases, and has special industrial application value. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation method of graphene-loaded core-shell nanoparticle material, comprising using nitrogen-doped graphene as a carrier, loading metal salts on the surface of graphene using impregnation-calcination method to obtain graphene-loaded core-shell structure nanoparticle materials, specifically comprises (1) providing graphene oxide prepared by the improved Hummers method, and nitrogen source reagent comprising urea or melamine, introducing nitrogen into the graphene structure, and preparing nitrogen-doped graphene, (2) dissolving the salt in a mixed solution of water and organic solvent to prepare salt solution, wetting the nitrogen-doped graphene with the volatile gas of an organic solvent, adding into the salt solution for immersion for 1-3 hours, and drying, and (3) roasting the powdered sample at 500℃ to obtain graphene-loaded core-shell nanoparticle materials.