▎ 摘　　要

NOVELTY - Preparing cellulose/graphene oxide/ferroferric oxide composite hydrogel catalytic carrier involves adding sodium hydroxide and urea to water, stirring well to obtain mixed aqueous solution of sodium hydroxide and urea. The pre-cooling treatment is performed. The cellulose is added to the mixed aqueous solution of sodium hydroxide and urea, stirred well to obtain cellulose solution. The graphene oxide is added to water and stirred well to obtain aqueous solution of graphene oxide. The aqueous solution of graphene oxide is mixed with cellulose solution and stirred to obtain aqueous solution of cellulose/graphene oxide. The cellulose/graphene oxide aqueous solution is casted into film, and then immersed in dilute sulfuric acid solution for coagulation bath treatment to obtain cellulose/graphene oxide hydrogel, washed, and set aside. The ferrous chloride and ferric chloride are added to the water and mixed well to obtain mixed aqueous solution of ferrous chloride and ferric chloride. USE - Method for preparing cellulose/graphene oxide/ferroferric oxide composite hydrogel catalytic carrier. ADVANTAGE - The method enables to prepare cellulose/graphene oxide/ferroferric oxide composite hydrogel catalytic carrier that is green and pollution-free, has easy operation, large-scale production and simple process. DETAILED DESCRIPTION - Preparing cellulose/graphene oxide/ferroferric oxide composite hydrogel catalytic carrier involves adding sodium hydroxide and urea to water, stirring well to obtain mixed aqueous solution of sodium hydroxide and urea. The pre-cooling treatment is performed. The cellulose is added to the mixed aqueous solution of sodium hydroxide and urea, stirred well to obtain cellulose solution. The graphene oxide is added to water and stirred well to obtain aqueous solution of graphene oxide. The aqueous solution of graphene oxide is mixed with cellulose solution and stirred to obtain aqueous solution of cellulose/graphene oxide. The cellulose/graphene oxide aqueous solution is casted into film, and then immersed in dilute sulfuric acid solution for coagulation bath treatment to obtain cellulose/graphene oxide hydrogel, washed, and set aside. The ferrous chloride and ferric chloride are added to the water and mixed well to obtain mixed aqueous solution of ferrous chloride and ferric chloride. The cellulose/graphene oxide hydrogel is soaked in the mixed aqueous solution of ferrous chloride and ferric chloride, taken out, and then soaked in alkaline solution, washed, to obtain cellulose/graphene oxide/triiron tetraoxide composite hydrogel catalytic carrier used in the field of sewage treatment.