▎ 摘　　要

NOVELTY - A polyamine-functionalized three-dimensional graphene-based aerogel is obtained by one-step reaction of graphene oxide and polyamine reducing agent under hydrothermal conditions, and has three-dimensional porous structure formed by self-assembling two-dimensional planar graphene. The aerogel contains primary amine, secondary amine, and tertiary amine functional groups at surface. The polyamine reducing agent includes a reducing polyamine polymer and/or a polyamine small molecule compound. USE - Polyamine-functionalized three-dimensional graphene-based aerogel for separating thorium and rare earth elements (claimed). ADVANTAGE - The graphene-based aerogel can be produced efficiently without using organic solvent. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of polyamine-functionalized three-dimensional graphene-based aerogel, which involves preparing a polyamine reducing agent aqueous solution and a graphene oxide dispersion, mixing, and performing hydrothermal reaction.