▎ 摘　　要

NOVELTY - Three-dimensional graphene sponge/ ferric oxide composite absorbing material comprises iron ions, deionized water as a solvent under alkaline conditions, spherical popcorn with a particle size of 150-250 nm, the ferric oxide nanoparticles are uniformly anchors in the three-dimensional graphene sponge structure, where the material is based on a three-dimensional graphene of a mesoporous sponge structure. USE - Used as three-dimensional graphene sponge/ ferric oxide composite absorbing material. ADVANTAGE - The absorbing material has large absorption intensity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing absorbing material, comprising (i) mixing the nickel powder to the mixed solution of sodium hydroxide solution and polyol, placing into oven , heating to 250-280 degrees C, reacting for 12-15 hours, naturally cooling to the room temperature, washing for many times with deionized water, absolute ethyl alcohol, vacuum drying the product to obtain black powder, adding the black powder into a tubular furnace under the protection of inert atmosphere, heating to 500-800 degrees C for 1-3 hours, naturally cooling to the room temperature, dissolving the nickel nanometer particle core using acid, washing for many times to PH 7 by deionized water, freeze-drying to obtain three-dimensional graphene sponge, adding into deionized water and ultrasonicating to obtain 2-5 mg/ml uniformly dispersed suspension, and adding 20-90 ml polyalcohol to 1-3 g nickel powder, and (ii) adding the three-dimensional graphene sponge suspension obtained in the step (i) into a three-necked flask and mechanically stirring, dissolving iron salt in deionized water to form a yellow solution containing iron oxide, dropping into three-necked flask containing a three-dimensional graphene sponge suspension, and mechanically stirring to obtain a mixed solution, heating to 70-95 degrees C, gradually adding alkaline solution, adjusting the PH of 9 13, reacting for 3-5 hours, using a magnet to adsorb water, alcohol washing to pH 7, and vacuum drying in oven to obtain a product, and adding 0.03-0.15 g three-dimensional graphene sponge/ 0.375-0.625 g iron salt in the mixed solution.