▎ 摘　　要

NOVELTY - A graphene and ferroferric oxide-gold composite material is prepared by dispersing nano ferroferric oxide in reducing agent solution, ultrasonically treating, heating, dripping chloroauric acid water solution, stirring and curing, adding with and azide in first solvent, stirring and reacting, repeatedly washing with second solvent to obtain azide modified ferroferric oxide-gold complex, placing graphene oxide in activator, adding propargyl alcohol, continuously reacting, dissolving with azide modified ferroferric oxide-gold complex in third solvent, adding catalyst, stirring and reacting. USE - Method for preparing graphene and ferroferric oxide-gold composite material used for nuclear magnetic imaging, microwave thermoacoustic imaging, photoacoustic imaging and X-ray imaging (claimed). ADVANTAGE - The material has magnetic and good microwave absorbing performance, good plasma resonance absorption and X-ray attenuation characteristics, and makes system stable by connecting covalent bond. DETAILED DESCRIPTION - A graphene and ferroferric oxide-gold composite material is prepared by dispersing nano ferroferric oxide in reducing agent solution, ultrasonically treating, heating to 65-75 degrees C, dripping chloroauric acid water solution under stirring condition, stirring and curing to obtain ferroferric oxide core-shell structure metal compound, adding with and azide in first solvent, stirring and reacting at 40-45 degrees C, repeatedly washing with second solvent under protective atmosphere to obtain azide modified ferroferric oxide-gold complex, placing graphene oxide in activator at 65-75 degrees C, adding propargyl alcohol, continuously reacting for 20-28 hours to obtain alkylated graphene oxide, dissolving azide modified ferroferric oxide-gold complex and alkylated graphene oxide in third solvent, adding catalyst, stirring and reacting under protection atmosphere, and collecting.