▎ 摘　　要

NOVELTY - Preparing graphene composite aerogel material involves mixing natural graphite, concentrated sulfuric acid and phosphoric acid uniformly, adding potassium permanganate, stirring the reaction in an ice-water bath for 0.5-1 hour, heating to 50-60 degrees C, stirring and reacting for 12-13 hours. The obtained product is transferred to ice water, hydrogen peroxide is added under stirring until the color of the solution turns golden yellow. The obtained product is filtered, washed, and dried to obtain graphene oxide. The graphene oxide is added to deionized water, and ultrasonically dispersed uniformly to obtain a graphene oxide aqueous solution. Nano silver is added to deionized water, dispersed uniformly, and 15-20 wt.% titanium trichloride solution is added. The mixture is mixed and stirred under dark conditions, transferred to a hydrothermal reactor, and heated up for hydrothermal reaction. The precipitate is centrifuged at a low speed, washed, and dried. USE - Method for preparing graphene composite aerogel material for removing formaldehyde (claimed). ADVANTAGE - The method synergizes with graphene aerogel through nano silver-titanium dioxide composite microspheres. Graphene aerogel has excellent adsorption performance, and nano-silver-titanium dioxide composite microspheres can completely degrade the adsorbed formaldehyde under photocatalytic action. It fundamentally solves the defects of graphene material such as low adsorption capacity and inability to completely degrade organic pollutants. The production process is simple, and it has high air purification efficiency, and good application prospect. DETAILED DESCRIPTION - Preparing graphene composite aerogel material involves mixing natural graphite, concentrated sulfuric acid and phosphoric acid uniformly, adding potassium permanganate, stirring the reaction in an ice-water bath for 0.5-1 hour, heating to 50-60 degrees C, stirring and reacting for 12-13 hours. The obtained product is transferred to ice water, hydrogen peroxide is added under stirring until the color of the solution turns golden yellow. The obtained product is filtered, washed, and dried to obtain graphene oxide. The graphene oxide is added to deionized water, and ultrasonically dispersed uniformly to obtain a graphene oxide aqueous solution. Nano silver is added to deionized water, dispersed uniformly, and 15-20 wt.% titanium trichloride solution is added. The mixture is mixed and stirred under dark conditions, transferred to a hydrothermal reactor, and heated up for hydrothermal reaction. The precipitate is centrifuged at a low speed, washed, and dried to prepare nano-silver-titanium dioxide composite microspheres. The nano silver-titanium dioxide composite microspheres, an reducing agent are added to the graphene oxide aqueous solution, mixed uniformly, poured into a mold, freeze-dried to remove water, and the desired product is obtained.