▎ 摘　　要

NOVELTY - Magnetic graphene fund palladium ferroferric oxide composite comprises e.g. substrate and active components on substrate, the substrate is graphene, the active component is gold nano particles, palladium nano particle and ferroferric oxide nano particle. The gold nano particle, the palladium nano particles and ferroferric oxide nanometer particle are loaded on graphene substrate in the form of alloy, where graphene is obtained by reducing graphene oxide, gold nano-particle is obtained by trivalent gold salt reduction, palladium nano granule is obtained by bivalent palladium salt reduction. USE - Used as magnetic graphene fund palladium ferroferric oxide composite. ADVANTAGE - The method has simple operating process and mild reaction condition. The composite: has excellent catalytic performance, synergistic effect and high activity of mimetic enzyme; and is magnetically reclaimed and recycled. DETAILED DESCRIPTION - Magnetic graphene fund palladium ferroferric oxide composite comprises substrate and active components on substrate, the substrate is graphene, the active component is gold nano particles, palladium nano particle and ferroferric oxide nano particle. The gold nano particle, the palladium nano particles and the ferroferric oxide nanometer particle are loaded on the graphene substrate in the form of alloy, where graphene is obtained by reducing graphene oxide, gold nano-particle is obtained by the trivalent gold salt reduction, palladium nano granule is obtained by bivalent palladium salt reduction, ferroferric oxide nano particle is obtained by trivalent iron salt reduction. An INDEPENDENT CLAIM is also included for preparing the composite comprising adding the oxidized graphene into aqueous solution, performing ultrasonic treatment for 15-90 minutes to obtain uniformly dispersed solution, adding reducing agent, stirring for 5-30 minutes, adding sodium hydroxide to the ferric iron salt to obtain mixed solution, raising the temperature to 80-120 degrees C under the condition of stirring for 6-24 hours, taking the mixed solution, continuously adding trivalent metal salt and bivalent palladium salt solution, continuously stirring the mixed solution at 80-150 degrees C for 6-24 hours, cooling to room temperature, centrifugally separating, washing with ethanol and distilled water, collecting precipitate and drying to obtain the composite.