▎ 摘　　要

NOVELTY - Preparing a polyvinylamine/(graphene oxide-carbon nanotube) composite aerogel material involves preparing graphene oxide by oxidation and surface activation treatment of graphite powder in the presence of strong oxidizing agent and mixing acid to obtain graphene oxide with carboxyl, hydroxyl, and epoxy functional groups on the surface. The graphene oxide and acidified carbon nanotubes are physically mixed in N,N-dimethylformamide solution. The carbon nanotubes form a cross-linked network between the graphene oxide layers to obtain a graphene oxide-carbon nanotube hybrid with a large specific surface area. The specific steps includes adding the graphene oxide aqueous solution and carbon nanotubes to the N,N-dimethylformamide solution, heating the reaction in a water bath, after the reaction, centrifugal separation and washing to neutrality, to obtain graphene oxide-carbon nanotubes tube suspension. USE - Method for preparing polyvinylamine/(graphene oxide-carbon nanotube) composite aerogel material. ADVANTAGE - The adsorption material has a large specific surface area, higher porosity and abundant adsorption sites. The adsorption material has large adsorption capacity, fast adsorption balance, wide adsorption range, good stability. The maximum adsorption capacity of this adsorbent for naphthol is 403 mg per gram, and the maximum adsorption capacity for methylene blue is 550 mg per gram. DETAILED DESCRIPTION - Preparing a polyvinylamine/(graphene oxide-carbon nanotube) composite aerogel material involves preparing graphene oxide by oxidation and surface activation treatment of graphite powder in the presence of strong oxidizing agent and mixing acid to obtain graphene oxide with carboxyl, hydroxyl, and epoxy functional groups on the surface. The graphene oxide and acidified carbon nanotubes are physically mixed in N,N-dimethylformamide solution. The carbon nanotubes form a cross-linked network between the graphene oxide layers to obtain a graphene oxide-carbon nanotube hybrid with a large specific surface area. The specific steps includes adding the graphene oxide aqueous solution and carbon nanotubes to the N,N-dimethylformamide solution, heating the reaction in a water bath, after the reaction, centrifugal separation and washing to neutrality, to obtain graphene oxide-carbon nanotubes tube suspension. The amino group in polyvinylamine reacts with the carboxyl group on the surface of graphene oxide, and loaded polyvinylamine on the graphene oxide-carbon nanotube hybrid. The polyvinylamine is used as a crosslinking agent to form a three-dimensional network structure between graphene oxide sheets to obtain a polyvinylamine/(graphene oxide-carbon nanotube) composite aerogel. The polyvinylamine is added to the graphene oxide-carbon nanotube suspension, and heated up the reaction to obtain the black sedimentation material, washed it multiple times, and freeze-dried to obtain the polyvinylamine/(graphene oxide-carbon nanotube) composite aerogel material.