▎ 摘　　要

NOVELTY - Preparation method of three-dimensional porous graphene aerogel material involves: mixing graphene oxide dispersion with organic amine, and hydrothermally reacting to obtain a hydrogel; and washing the hydrogel with water, freezing and drying. USE - Preparation method of three-dimensional porous graphene aerogel material used in acid gas adsorption, preferably carbon dioxide (claimed). ADVANTAGE - The organic amines with relatively high amino content are selected as the crosslinking agent and reducing agent, and the three-dimensional porous graphene aerogel material is prepared by a one-step hydrothermal method, which is simple to operate and low in cost. Organic amines are rich in amino groups, which provides adsorption sites for the adsorption of acid gases, with strong selectivity and high adsorption capacity, and the adsorption capacity of carbon dioxide reaches 2.27 mmol/g. The organic amine molecules intercalate between the graphene sheets, which effectively reduces the agglomeration between graphenes. The freeze-drying technology gives the material a multi-level pore structure and increases the specific surface area of the material. The BrunauerEmmettTeller specific surface area reaches 37 m2/g, regeneration performance of the three-dimensional porous graphene aerogel material is stable, with 10 adsorption regeneration times, and the regeneration rate reaches 91%. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the three-dimensional porous graphene aerogel material prepared by the above method.