▎ 摘　　要

NOVELTY - A graphite oxide is dispersed into deionized water, ultrasonically treated, centrifuged and poured into a container which is placed in a oil-bath coiler, hydrazine hydrate and anion surfactant are added to container and condensed to obtain modified graphene. Soluble trivalent and divalent ion salts are added to graphene dispersing solution and poured into modified graphene dispersing solution. The solution is ultrasonically agitated and liquid ammonia is added to obtain graphene-doped ferroferric oxide magnetic nano grain compound material. USE - Preparation of graphene-doped ferroferric oxide magnetic nano grain compound material. ADVANTAGE - The method easily provides graphene-doped ferroferric oxide magnetic nano grain compound material with high yield by a simple process. The compound material has pure crystal phase and favorable electrocatalytic activity. DETAILED DESCRIPTION - Graphite oxide (200-240 mg) is dispersed in deionized water (200-240 ml), ultrasonically treated for 60-100 minutes, centrifuged and poured into a container. The container is placed into a oil-bath coiler, hydrazine hydrate (2-3 ml) and anion surfactant (0.1-0.2 g) are added to container, heated at 100-120 degrees C, condensed, reflowed for 20-24 hours, cooled and dried to obtain modified graphene. The obtained graphene is dispersed in water solution, ultrasonically agitated and centrifuged to obtain graphene dispersing solution. The soluble trivalent and divalent ions salts are added to the obtained solution and dissolved in deionized water, nitrogen gas is separated for 10-30 minutes and poured into modified graphene dispersing solution. The obtained solution is ultrasonically agitated, liquid ammonia is added, heated at 50-70 degrees C to react for 30-60 minutes, cooled to room temperature, washed, product is collected and parched to obtain graphene-doped ferroferric oxide magnetic nano grain compound material.