▎ 摘　　要

NOVELTY - The preparation method of a metal oxide based carbon flow electrode composite involves: (i) doping of nitrogenous compound with graphene oxide to form nitrogen doped graphene oxide, which is obtained by sonication of graphene oxide to which the nitrogenous compound is added and continuous stirred and dried to get powdered form of nitrogen doped graphene oxide; (ii) adding metal oxide nanoparticles to nitrogen doped graphene oxide to form metal oxide (preferably zinc oxide) based nitrogen doped graphene oxide by solvothermal process; (iii) treating the metal oxide based nitrogen doped graphene oxide with a polymer compound by chemical oxidation method to form a polymer composite, where the polymer compound is polyaniline; and (iv) stirring the polymer composite with distilled water. USE - Preparation method of a metal oxide based carbon flow electrode composite useful for capacitive desalination of water. ADVANTAGE - The metal oxide based carbon flow electrode exhibit desalting efficiency of 30-38.1% with salt adsorption capacity of 288 mg g1 at 10 mL min-1 at 1.2 V, has surface area of 25-31.65 m/g and pore size of 60-67 nm, pseudocapacitive performance with specific capacitance of 600-628.4 F g' in 0.1 M potassium chloride electrolyte. The highly porous with more active sites and high conductivity nature of zinc oxide/nitrogen-doped graphene oxide/polyaniline composite provides better electrochemical performance.-2-1 DETAILED DESCRIPTION - The preparation method of a metal oxide based carbon flow electrode composite involves: (i) doping of nitrogenous compound with graphene oxide to form nitrogen doped graphene oxide, which is obtained by sonication of graphene oxide to which the nitrogenous compound is added and continuous stirred and dried to get powdered form of nitrogen doped graphene oxide; (ii) adding metal oxide nanoparticles to nitrogen doped graphene oxide to form metal oxide (preferably zinc oxide) based nitrogen doped graphene oxide by solvothermal process, where the nitrogen doped graphene oxide is initially sonicated to which zinc acetate is added, stirred and maintained at 1500-1600° C for 48 hours and then dried to obtain powdered form of metal oxide based nitrogen doped graphene oxide; (iii) treating the metal oxide based nitrogen doped graphene oxide with a polymer compound by chemical oxidation method to form a polymer composite, where the polymer compound is polyaniline; and (iv) stirring the polymer composite with distilled water for 24 hours to form metal oxide based carbon flow electrode composite for flow capacitive deionization, thus exhibiting desalting efficiency of 30-38.1%. An INDEPENDENT CLAIM is included for a metal oxide based carbon flow electrode composite for capacitive desalination, which comprises: a conductive material in a granular form, where the conducting material is an intercalation of a metal oxide nanoparticles and a nitrogen-polymer compounds with carbon materials to obtain a slurry flow electrode which can act as an efficient carbon composite flow electrode for flow capacitive deionization operation, the nitrogen-polymer compounds are nitrogen doped graphene oxide and polyaniline, and the metal oxide nanoparticles are zinc oxide which is intercalated with carbon materials.