▎ 摘　　要

NOVELTY - Preparing iron/manganese oxide doped graphene composite comprises synthesizing graphene composite of different sizes with iron chloride dissolved in ethylene glycol to obtain a yellow transparent solution, adding graphene oxide and anhydrous sodium acetate to the solution and then magnetically stirring for 30 minutes, transferring the solution the solution a stainless steel autoclave placed in an oven at 220 degrees C for 8-72 hours for crystallization, washing the solution to obtain graphene. USE - The method is useful for preparing iron/manganese oxide doped graphene composites (claimed) that are useful in electrochemical applications. ADVANTAGE - The method is capable of easily the preparing iron/manganese oxide doped graphene composites with good absorption, electrical conductivity and separation property. DETAILED DESCRIPTION - Preparing iron/manganese oxide doped graphene composite comprises synthesizing graphene composite of different sizes with iron chloride by dissolving in ethylene glycol to obtain a yellow transparent solution, adding graphene oxide and anhydrous sodium acetate to the solution and then magnetically stirring for 30 minutes, transferring the solution to a stainless steel autoclave placed in an oven at 220 degrees C for 8-72 hours for crystallization, washing the solution to obtain graphene, dispersing graphite in water, adding manganese sulfate to the solution, ultrasonically dispersing the solution, adding potassium hydroxide and potassium permanganate and them magnetically stirring at temperature of 80 degrees C and then reacting for 1-4 hours, washing the solution with ethanol, and vacuum drying the solution.