▎ 摘　　要

NOVELTY - A nanometer ferroferric oxide loaded graphene composite is prepared by preparing 5-15 mg/ml mixed stock solution of sodium hydroxide and diethylene glycol at 120-130 degrees C, reducing the temperature to 60-70 degrees C, preparing 0.5-3.5 mg/ml graphene oxide mixed solution of diethylene glycol, performing ultrasonic dispersion, adding ferric trichloride so that quality of the graphene is 1-4 times, stirring the mixed solution under nitrogen gas protection for 0.5 h, stirring and heating to 200-240 degrees C, heating for 0.5-2 h, and taking sodium hydroxide and diethylene glycol mixed stock solution. USE - Preparation of nanometer ferroferric oxide loaded graphene composite for magnetic separation, biomedical and electromagnetic material. ADVANTAGE - Dispersion degree is high, and coverage density and particle size are controllable. DETAILED DESCRIPTION - A nanometer ferroferric oxide loaded graphene composite is prepared by preparing 5-15 mg/ml mixed stock solution of sodium hydroxide and diethylene glycol at 120-130 degrees C, reducing the temperature to 60-70 degrees C, preparing 0.5-3.5 mg/ml graphene oxide mixed solution of diethylene glycol, performing ultrasonic dispersion, adding ferric trichloride so that quality of the graphene is 1-4 times, stirring the mixed solution under nitrogen gas protection for 0.5 h, stirring and heating to 200-240 degrees C, heating for 0.5-2 h, taking sodium hydroxide and diethylene glycol mixed stock solution, adding water, heating mixed solution, separating obtained compound, and washing with ethanol.