▎ 摘　　要

NOVELTY - Preparing macroscopic three-dimensional graphene sol-gel adsorption material, comprises adopting classical Hummer's method to prepare graphite oxide, dispersing in water, centrifugally separating to obtain graphene oxide suspension liquid, adding polyethyleneimine to the suspension liquid to form a mixed solution, reacting the mixed solution at 90 degrees C for 30 minutes to 6 hours to obtain the three-dimensional structured graphene hydrogel, washing the obtained graphene hydrogel with deionized water to remove residual impurities, then freeze-drying at -45 degrees C to obtain graphene oxide aerogel. USE - The adsorption material is useful for purifying indoor air (claimed). ADVANTAGE - The method is simple, economical, environmentally friendly and convenient to control, and thus it is suitable for industrial mass production. DETAILED DESCRIPTION - Preparing macroscopic three-dimensional graphene sol-gel adsorption material, comprises: (a) adopting classical Hummer method to prepare graphite oxide; (b) dispersing the prepared graphite oxide solid in water for two hours by ultrasonic treatment, and then centrifugally separating to obtain graphene oxide suspension liquid; (c) adding polyethyleneimine to the suspension liquid to form a mixed solution, reacting the mixed solution at 90 degrees C for 30 minutes to 6 hours to obtain the three-dimensional structured graphene hydrogel; and (e) washing the obtained graphene hydrogel with deionized water to remove residual impurities, then freeze-drying at -45 degrees C under the pressure of 0.02 Mbar for 48-96 hours to obtain graphene oxide aerogel. An INDEPENDENT CLAIM is are also included for macroscopic three-dimensional graphene sol-gel adsorption material, comprising a three-dimensional gas aerogel formed by assembling graphene sheets, where the formaldehyde gas adsorption amount is 1.96-2.43 mg/g.