▎ 摘　　要

NOVELTY - Preparation of graphene oxide-polyethyleneimine/silica composite aerogel comprises stripping graphene oxide aqueous solution through an ultrasonic water bath to obtain a uniformly dispersed graphene oxide dispersion and adjusting pH value with sodium hydroxide aqueous solution; mixing the graphene oxide dispersion liquid after adjusting the pH value with polyethyleneimine aqueous solution to prepare a graphene oxide-polyethyleneimine mixed liquid; putting into a mold, heat-preserving, removing the film, and soaking in deionized water to obtain a graphene oxide-polyethyleneimine hydrogel; preparing silica precursor solution, adding hydrogel, immersing, and condensing under low temperature; and subjecting to solution replacement and freeze-drying. USE - The method is used for preparing graphene oxide-polyethyleneimine/silica composite aerogel. ADVANTAGE - The method improves amine functional group loading amount, avoids sensitive crushing phenomenon of the silicon dioxide gel, and improves the adsorption performance of the composite aerogel.