▎ 摘　　要

NOVELTY - Preparation method of graphene-ferric oxide composite magnetic carrier, involves (a) mixing soluble iron salt in deionized water, (b) dripping the precipitant, stirring, leaving it, aging, performing hydrothermal reaction, filtering, and drying to obtain the transition metal hydroxide complex precipitate, (c) mixing graphite and potassium permanganate, adding to a three-necked flask containing a mixed acid solution of concentrated sulfuric acid and phosphoric acid, stirring the reaction to obtain the gray-green solution, adding the precipitate in step (b), adding hydrogen peroxide, changing the solution from grayish green to bright yellow, stirring and ultrasonically dispersing to obtain a transition metal hydroxide/graphene oxide suspension, (d) washing it, centrifuging, and calcining to obtain a metal composite oxide/graphene, and (e) bombarding the composite material with a high-frequency and strong pulsed electron beam to change the structure and performance of the material. USE - The method is used for preparation of graphene-ferric oxide composite magnetic carrier which is used as a medical magnetic targeting drug carrier. ADVANTAGE - The iron oxide/graphene composite material prepared by the method is used as a medical magnetic targeting drug carrier, and the mechanical stability of the carrier is enhanced, and the magnetism of graphene per unit mass is enhanced. DETAILED DESCRIPTION - Preparation method of graphene-ferric oxide composite magnetic carrier, involves (a) dissolving soluble iron salt in deionized water based on the ratio and uniformly mixing to form a uniform solution, (b) dripping the precipitant to the uniform solution, continuously stirring during dripping, until the pH of the solution reaches above 10, stopping the dripping addition, continuously stirring for 1-3 hours, leaving it to stand at room temperature, aging for 4 hours, performing hydrothermal reaction, filtering and washing with water to neutrality, and drying to obtain the transition metal hydroxide complex precipitate, (c) weighing graphite and potassium permanganate with a mass ratio of 1:5-15, evenly mixing them, adding them to a three-necked flask containing a mixed acid solution of 98% concentrated sulfuric acid and phosphoric acid, continuously stirring the reaction for 12 hours to obtain the gray-green solution, after an ice-water bath for 2 hours, adding the hydroxide complex precipitate obtained in step (b), slowly adding 5-15 ml of hydrogen peroxide, simultaneously rapidly changing the solution from grayish green to bright yellow, continuously stirring for 30-40 minutes, and ultrasonically dispersing for 1-2 hours to obtain a transition metal hydroxide/graphene oxide suspension, (d) washing the product obtained in step (c), centrifuging, drying and calcining to obtain a metal composite oxide/graphene, and (e) placing the composite magnetic targeting material obtained in step (d) in a high-current pulsed electron beam instrument, and bombarding the composite material with a high-frequency and strong pulsed electron beam to change the structure and performance of the composite material.