▎ 摘　　要

NOVELTY - Preparation of graphene-coated metal nano-particle porous powder material involves (s1) weighing nitrate and carbon-containing polymer according to certain mass ratio, dissolving the nitrate in certain amount of water, stirring uniformly, adding the carbon-containing polymer, and continuously stirring uniformly, (s2) drying the prepared solution for use, and (s3) placing the dried sample into tubular furnace, introducing inert gas, keeping certain heating speed, heating to certain temperature, and heat-preserving for period of time. USE - Preparation of graphene-coated metal nanoparticle porous powder material used as wave absorber, and used for wave absorption, electromagnetic shielding, and adsorption applications. ADVANTAGE - The method provides porous powder material with excellent wave absorbing performance. The method has low requirement on experimental device. In addition, the method can be further extended to be used for preparing other multidimensional and multi-component composite materials by being compounded with other nano-materials.