▎ 摘　　要

NOVELTY - Adsorption material of polyethyleneimine grafted nanometre ferric oxide (Fe3O4)-graphene comprises bromobutyrylated nano Fe3O4, epoxidized graphene aerogel, polyethylenimine in a mass ratio of 20-40: 30-50: 30-50: 100. USE - Adsorption material of polyethyleneimine grafted nanometre ferric oxide (Fe3O4)-graphene. ADVANTAGE - The adsorption material of polyethyleneimine grafted nanometre ferric oxide (Fe3O4)-graphene generate positive and negative charges electrostatic attraction with the sulfonate anions of Congo Red, and has excellent adsorption performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing adsorption material of polyethyleneimine grafted nanometre Fe3O4-graphene, which involves: (A) adding ethylene glycol, ferric chloride (FeCl3) and ferrous chloride (FeCl2) to the distilled water solvent; (B) adding ammonia water to adjust the pH of the solution to 10-11; (C) heating to 80-100 degrees C and reacting for 1-2 hours and centrifugal separation; (D) washing and drying, preparing ethylene glycol modified nano Fe3O4; (E) adding ethylene glycol modified nano-Fe3O4 into the chloroform solvent; (F) adding 4-bromobutyryl chloride after uniform ultrasonic dispersion, heating to 55-65 degrees C, reacting for 12-24 hours; (G) distilling under reduced pressure, washing and drying to prepare bromobutyrylated nano Fe3O4; (H) adding graphene oxide to the distilled water solvent; (I) pouring the solution into a hydrothermal reaction kettle after the ultrasonic dispersion is uniform; (J) heating to 170-190 degrees C and reacting for 5-10 hours and centrifugal separation; (K) washing and drying to prepare a three-dimensional graphene aerogel; (L) adding the three-dimensional graphene aerogel to the distilled water solvent; (M) adding potassium iodide and epichlorohydrin after uniform ultrasonic dispersion, heat to 100-110 degrees C, reacting for 10-20 hours and centrifugal separation; (N) washing and drying to prepare epoxy functionalized graphene aerogel; (O) adding bromobutyrylated nano Fe3O4 and epoxy functionalized graphene aerogel to 1,4-dioxane solvent; (P) adding polyethyleneimine, heat to 80-110 degrees C, reacting for 20-30 hours after ultrasonic dispersion is uniform; and (Q) washing and drying under reduced pressure distillation, and preparing the adsorption material of polyethyleneimine grafted nano Fe3O4-graphene.