▎ 摘　　要

NOVELTY - Preparing graphene copper ferrite composite wave absorbing material comprises e.g. (i) mixing and stirring copper salt and iron salt in an alcohol solvent, adding sodium acetate into the solution, stirring, pouring the mixed solution into a Teflon *(Polytetrafluoroethylene)-lined autoclave at 180-250℃, reacting at high temperature for 8-20 hours, cooling at room temperature, collecting the product, centrifuging, washing, and drying to obtain the product; (ii) mixing the product with excess iron salt, pouring it into deionized water, collecting the product after stirring, centrifuging, washing and drying to obtain copper ferrite powder; and (iii) dispersing graphene oxide ultrasonically in a water solvent, ultrasonic stirring with a graphene oxide solution, pouring the copper ferrite powder into the graphene oxide solution, stirring, reacting at high temperature for 10-15 hours, cooling to room temperature, collecting the product, centrifuging, washing, and drying. USE - The method is useful for preparing graphene copper ferrite composite wave absorbing material. ADVANTAGE - The method: has simple process steps and controllable synthesis method; is economical and environmentally-friendly; and prepares graphene copper ferrite composite wave absorbing material with excellent wave-absorbing performance. DETAILED DESCRIPTION - Preparing graphene copper ferrite composite wave absorbing material comprises (i) mixing and stirring copper salt and iron salt in an alcohol solvent, adding sodium acetate into the solution, stirring, pouring the mixed solution into a Teflon ((Polytetrafluoroethylene)-lined autoclave at 180-250℃, reacting at high temperature for 8-20 hours, cooling at room temperature, collecting the product, centrifuging, washing, and drying to obtain the product, the copper salt comprises copper chloride, copper sulfate or copper nitrate and iron salt comprises ferric chloride, ferric sulfate or ferric nitrate and the mol ratio of described copper salt, iron salt and sodium acetate is 1:2:45; (ii) mixing the product with excess iron salt, pouring it into deionized water, collecting the product after stirring, centrifuging, washing and drying to obtain copper ferrite powder, the iron salt is consistent with step (i) and the mol ratio of iron salt and product is (1-4):1; and (iii) dispersing graphene oxide ultrasonically in a water solvent, ultrasonic stirring with a graphene oxide solution, pouring the copper ferrite powder into the graphene oxide solution, stirring ultrasonically for mixing, pouring the mixed solution into a Teflon-lined autoclave at 100-180℃, reacting at high temperature for 10-15 hours, cooling to room temperature, collecting the product, centrifuging, washing, and drying. The mass ratio of the copper ferrite to graphene is (1-15):1.