▎ 摘　　要

NOVELTY - Preparing magnetic graphene-based iron (n+) heterogeneous catalyst comprises (1) oxidizing the graphite, adding into the ultra-pure water, ultrasonically dispersing to obtain oxidized graphene aqueous solution, (2) adding mixed solution of ferrous ion and ferric ion into the step (1) graphene oxide aqueous solution, stirring, carrying out chemical coprecipitation reaction to obtain product, where the mixed solution of ferrous ion and ferric ion is the mixed solution of iron (II) sulfate heptahydrate and iron (III) chloride hexahydrate, and (3) separating and settling the step (2) product, washing with ultra-pure water to neutral to obtain magnetic graphene-based iron (n+) heterogeneous catalyst, the catalyst is composed of graphene oxide alkenyl body and a magnetic catalytically active component supported on a iron (n+) graphene oxide alkenyl body. USE - The heterogeneous catalyst is useful for catalytic degradation of the refractory organic wastewater by simultaneous with hydrogen peroxide (claimed). ADVANTAGE - The catalyst has excellent magnetic separation properties and stable catalytic activity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use method of magnetic graphene-based iron (n+) heterogeneous catalyst in the catalytic degradation reaction, comprising when the refractory organic waste water is 50-500 mg/l, the dosage of magnetic graphite alkenyl iron (+) heterogeneous catalyst with the hydrogen peroxide in the waste water is 0.05-0.08 g:9 ml, the mass of hydrogen peroxide in the hydrogen peroxide solution is 30%, and the pH range of the reaction system is 3-11.