▎ 摘　　要

NOVELTY - Preparing graphene aerogel comprises adding a graphene oxide dispersion liquid and an amine compound into a reaction container, uniformly mixing to obtain a mixture of oxidized graphene, where the amine compound is diethylamine, ethylenediamine, propylenediamine, butylene diamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, polyallylamine and/or N,N'-bis(2-aminoethyl)-1,3-propanediamine, carrying out irradiation reaction, reacting the mixture to obtain an amino modified graphene hydrogel, freeze-drying, and drying using supercritical carbon dioxide. USE - The method is useful for preparing graphene aerogel, which is useful for absorbing an organic solvent (all claimed). ADVANTAGE - The method simply prepares the graphene aerogel in an eco-friendly manner. DETAILED DESCRIPTION - Preparing graphene aerogel comprises adding a graphene oxide dispersion liquid and an amine compound into a reaction container, uniformly mixing to obtain a mixture of oxidized graphene, where the amine compound is diethylamine, ethylenediamine, propylenediamine, butylene diamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, polyallylamine and/or N,N'-bis(2-aminoethyl)-1,3-propanediamine, carrying out irradiation reaction under anaerobic condition, reacting the mixture to obtain an amino modified graphene hydrogel, freeze-drying the amino modified graphene hydrogel, and drying using supercritical carbon dioxide. An INDEPENDENT CLAIM is included for the graphene aerogel prepared by the above method.