Method for synthesizing ferroferric oxide-loaded carbon nanotube-reinforced graphene composite material and application

The invention relates to a method for synthesizing a ferroferric oxide-loaded carbon nanotube-reinforced graphene composite material and an application. The method comprises the following steps: with a single-wall carbon nanotube as a raw material, sequentially adding the single-wall carbon nanotube, a lithium wafer and iodo-dodecane for stirring in liquid nitrogen, so as to obtain the single-wall carbon nanotube grafted with dodecyl on the surface; carrying out ultrasonic dispersion, coating copper foil with a chloroform solution which is subjected to ultrasonic dispersion in a spinning manner, putting the chloroform solution in a tube furnace, and carrying out calcination at 900-1100 DEG C; obtaining the copper foil coated with the carbon nanotube; stirring and dissolving ferric chloride into ethylene glycol, adding sodium acetate and polyethylene glycol, carrying out magnetic stirring, and then putting the mixture into a polytetrafluoroethylene-lined reaction kettle; soaking the copper foil in the solution