▎ 摘　　要

NOVELTY - Preparation of porous graphene nanofiber film by taking graphene oxide in anhydrous ethanol, ultrasonic dispersing uniformly to obtain the graphene oxide ethanol solution; adding polyacrylonitrile to N,N-dimethylformamide and acetone composite solvent, and stirring to dissolve and obtain polyacrylonitrile solution; preparing polyacrylonitrile/graphene composite nanofiber film; and placing the prepared polyacrylonitrile/graphene composite nanofiber film in water, and drying to obtain the porous graphene nanofiber film. USE - Method for preparing porous graphene nanofiber film (claimed) used in the field of separation and enrichment material, catalyst support, medical biomaterials, ion adsorption, and wastewater treatment. DETAILED DESCRIPTION - Preparation of porous graphene nanofiber film comprises: (A) taking graphene oxide in anhydrous ethanol, where the concentration graphene oxide is 0.1-1%, ultrasonic dispersing for 1-3 hours, and dispersing uniformly to obtain the graphene oxide ethanol solution; (B) adding polyacrylonitrile to N,N-dimethylformamide and acetone composite solvent, and stirring at 60-80 degrees C to dissolve and obtain a concentration of 5-20% polyacrylonitrile solution; (C) under stirring, adding dropwise the graphene oxide solution containing ethanol to a solution of polyacrylonitrile, mixing uniformly, standing defoaming in electrospinning device to obtain polyacrylonitrile/graphene composite nanofiber film, where the electrospinning conditions include voltage at 10-30 kV, temperature at 20-40 degrees C, a relative humidity of 30-70%, spinning distance of 10-25 cm, and the flow rate of the nozzle head spinning solution is 0.5-1 ml/hour; and (D) placing the prepared polyacrylonitrile/graphene composite nanofiber film in water at 50-70 degrees C for 30-40 minutes, and drying for 6-8 hours at 80-90 degrees C in the vacuum oven to obtain the porous graphene nanofiber film.