▎ 摘　　要

NOVELTY - Preparation of graphene aerogel having directional ordered pore structure involves dispersing graphene oxide (GO) in water to obtain a graphene oxide solution, dissolving polyethyleneimine (PEI) in a phosphate buffer solution or ethanol solution to obtain a polyethyleneimine solution, dissolving chitosan (CS) in acetic acid to obtain chitosan solution, adding the polyethyleneimine solution and the chitosan solution into the graphene oxide solution, mixing uniformly, performing hydrothermal reduction reaction to obtain graphene-polyethyleneimine-chitosan composite slurry, adding the composite slurry into a mold for freezing, and vacuum drying. The thermal conductivity coefficient of the bottom of the mold is greater than that of the side wall. USE - Preparation of graphene aerogel for carbon dioxide adsorption (all claimed). ADVANTAGE - The method provides graphene aerogel having directional ordered pore structure, high specific surface area, high porosity and rich carbon adsorption sites beneficial for adsorbing carbon dioxide. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for graphene aerogel.