▎ 摘　　要

NOVELTY - Preparation of magnetic iron-based heterogeneous Fenton-based catalyst with graphene as carrier involves weighing 1.0-2.0 g graphene oxide, adding to 200 mL ethylene glycol and diethylene glycol mixture, ultrasonicating, adding ferric chloride hexahydrate, sodium acetate and sodium acrylate, and stirring at room temperature to obtain first mixed solution; and transferring first mixed solution to PTFE reactor, holding at 200 degrees C for 10-15 hours, cooling to room temperature, repeatedly washing with ethanol and water at volume ratio of 1:1, and dispersing in 600 mL deoxygenated deionized water. USE - Method for preparation of magnetic iron-based heterogeneous Fenton-based catalyst with graphene as carrier for degrading phenolic pollutants in sewage(claimed). ADVANTAGE - The method reduces generation of large amount of chemical sludge. DETAILED DESCRIPTION - Preparation of magnetic iron-based heterogeneous Fenton-based catalyst with graphene as carrier comprises: (A) weighing 1.0-2.0 g graphene oxide, adding to 200 mL ethylene glycol and diethylene glycol mixture, ultrasonicating, adding ferric chloride hexahydrate, sodium acetate and sodium acrylate, and stirring at room temperature to obtain first mixed solution; (B) transferring first mixed solution to PTFE reactor, holding at 200 degrees C for 10-15 hours, cooling to room temperature, repeatedly washing with ethanol and water at volume ratio of 1:1, and dispersing in 600 mL deoxygenated deionized water to obtain aqueous dispersion of magnetite-graphene; (C) weighing ferrous sulfate heptahydrate, and dissolving in 50 mL deoxygenated deionized water to obtain ferrous sulfate solution; (D) adjusting pH of ferrous sulfate solution to with 1 mol/L sodium hydroxide solution in 50 mL deionized deionized water, and adding 1.36-2.0 g sodium borohydride to obtain second mixed solution; (E) slowly adding ferrous sulfate solution by drops to aqueous dispersion of magnetite-graphene, and stirring at room temperature for 1 hour to obtain third mixed solution; and (F) slowly adding second mixed solution by drops to third mixed solution, reacting for 1 hour, collecting product by magnet, washing with mixture of ethanol and water at volume ratio of 1:1, vacuum drying at 40 degrees C for 24 hours, grinding, and sieving to obtain catalyst. The volume ratio of ethylene glycol and diethylene glycol is 19:1.