▎ 摘　　要

NOVELTY - Method for preparing nickel-plated graphene hollow spheres, involves (a) using sandpaper to remove oxide layer on surface of non-powder-like metal medium with electrode potential lower than nickel, soaking the oxide layer in inorganic acid solution, continuously reacting for not less than 3 minutes when continuous bubbles are generated on surface of the metal medium, cleaning and drying to obtain acid-treated metal medium, (b) uniformly dispersing graphene in chemical plating solution having concentration of 0.08-0.15 g/l, soaking the treated metal medium in chemical plating solution, when the temperature of chemical plating solution reaches 60-80 degrees C, adding reducing agent, stirring the reaction at a stirring rate of 120-180 rpm for not less than 90 minutes, removing the unreacted metal medium, collecting the solid powder, and cleaning the collected solid powder, and drying, where the chemical plating solution is solution prepared using soluble nickel salt, citrate, pH regulator and water. USE - The hollow spheres used for wave absorbing material application. ADVANTAGE - The method is simple to operate and economical, ensures high ball formation rate and excellent repeatability, and the prepared nickel-plated graphene hollow spheres exert excellent wave absorbing properties of nickel and graphene, and ensure low density of particle. DETAILED DESCRIPTION - Method for preparing nickel-plated graphene hollow spheres, involves (a) using sandpaper to remove oxide layer on surface of non-powder-like metal medium with electrode potential lower than nickel, soaking the oxide layer in inorganic acid solution, continuously reacting for not less than 3 minutes when continuous bubbles are generated on surface of the metal medium, cleaning and drying to obtain acid-treated metal medium, (b) uniformly dispersing graphene in chemical plating solution having concentration of 0.08-0.15 g/l, soaking the treated metal medium in chemical plating solution, when the temperature of chemical plating solution reaches 60-80 degrees C, adding reducing agent, stirring the reaction at a stirring rate of 120-180 rpm for not less than 90 minutes, removing the unreacted metal medium, collecting the solid powder, and cleaning the collected solid powder, and drying to obtain nickel-plated graphene hollow spheres, where the chemical plating solution is solution prepared using soluble nickel salt, citrate, pH regulator and water, the concentration of nickel ion in chemical plating solution is 0.03-0.06 mol/l, the concentration of citrate in chemical plating solution is 0.02-0.04 mol/l, the pH regulator is sodium hydroxide, potassium hydroxide or aqueous ammonia, and the reducing agent is hydrazine hydrate, sodium hypophosphite or sodium borohydride.