▎ 摘　　要

NOVELTY - The preparation method of carbon-supported magnetic nanoparticle and nitrogen-doped magnetic graphene, involves: uniformly mixing molecules capable of simultaneously providing a carbon source and a nitrogen source serving as raw materials and metallocene serving as a catalyst to obtain a mixture of the raw materials and the catalyst; uniformly dispersing a mixture of raw materials and the catalyst in a sealable reaction container in an atmosphere with an oxygen content of 0-30%, sealing, placing the mixture in a reaction device for heat treatment, and naturally cooling to room temperature. USE - Preparation method of carbon-supported magnetic nanoparticle and nitrogen-doped magnetic graphene. ADVANTAGE - The magnetic graphene prepared by the method has low product cost, simple process, easy operation, good repeatability and large-scale production. The graphene is high in quality, and the magnetic nanoparticles are wrapped by the nano carbon layers, so that the magnetic graphene has good structural stability and chemical stability, is resistant to acid and alkali corrosion, resistant to air oxidation and capable of having long-term magnetic performance. The conventional magnetic material has poor long-term stability because the used magnetic nanoparticles are exposed to air and corroded away over time to reduce the magnetism. DESCRIPTION OF DRAWING(S) - The drawing shows a scanning electron microscope photograph of the carbon-supported magnetic nanoparticle and nitrogen-doped magnetic graphene