▎ 摘　　要

NOVELTY - Preparation of graphene/carbon nanotubes aerogel involves adding magnetic nanoparticles to graphene oxide/carbon nanotube dispersion, magnetically stirring, obtaining magnetic graphene oxide/carbon nanotube dispersion, adding 0.2 g chitosan powder into 50 mL 2% glacial acetic acid, forming chitosan solution, gradually adding chitosan solution to magnetic graphene oxide/carbon nanotube dispersion, stirring, aging for 12-24 hours, obtaining chitosan/graphene oxide/carbon nanotube suspension, transferring chitosan/graphene oxide/carbon nanotube suspension to a reaction kettle, hydrothermally reacting, obtaining hydrogel, directly placing hydrogel in uniformly mixed 10-20% hydroalcoholic solution, dialyzing for more than 6 hours, placing in refrigerator, freezing at -20 degrees C for 24-48 hours, placing frozen hydrogel in a tray built into lyophilizer, maintaining the pressure to less than 10 Pa and freeze-drying for 24-48 hours. USE - Preparation of graphene/carbon nanotubes aerogel used for adsorbing heavy metal ions. ADVANTAGE - The method efficiently and economically provides graphene/carbon nanotubes aerogel with reduced generation of curl agglomeration of graphene oxide, by simple method. DETAILED DESCRIPTION - The graphene oxide/carbon nanotube dispersion is obtained by adding 0.5-0.8 g graphene oxide powder to 100 mL deionized water, ultrasonically dispersing for 1 hour, preparing graphene oxide dispersion, weighing 0.5 g carbon nanotubes, adding to obtained graphene oxide dispersion and ultrasonically dispersing for 0.5 hour.