▎ 摘　　要

NOVELTY - Preparing MXene/graphene/polyethyleneimine composite aerogel comprises mixing the MXene material and water, performing ultrasonication and centrifugation in sequence to obtain the MXene suspension, mixing the MXene suspension, graphene oxide and polyethyleneimine for hydrothermal reaction to obtain MXene/graphene/polyethyleneimine composite hydrogel, drying the MXene/graphene/polyethyleneimine composite hydrogel to obtain the MXene/graphene/polyethyleneimine composite aerogel. USE - The method is useful for preparing MXene/graphene/polyethyleneimine composite aerogel, which is useful in the field of uranyl ion and heavy metal ion adsorption (claimed). ADVANTAGE - The composite aerogel: has density of 0.05-0.5 g/cm3, and the specific surface area of 100-1600 m2/g; adopts MXene to improve the mechanical strength of the gel; reduces graphene oxide to graphene to promote the formation of the gel material in the hydrothermal reaction and improves the specific surface area of the aerogel; adopts MXene and graphene, which forms layered two-dimensional structure; has large specific surface area; improves the specific surface area of the aerogel; and improves the adsorption performance of the aerogel for uranyl ion and heavy metal ion. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for MXene/graphene/polyethyleneimine composite aerogel.