▎ 摘　　要

NOVELTY - Preparing nickel black-graphene composite photothermal conversion film involves adding a certain amount of ammonium sulfate and nickel sulfate into solvent, and stirring until fully dissolved to form an electrolyte. The nickel foam is cathode, graphite foil is anode, and electrode distance is adjusted in electrolyte. The gas generated by electrolyte and hydroxyl radicals have intercalation effect on graphite foil, thus peeling off graphene. The nickel ion acts as carrier, and at the same time when graphene is transferred to cathode, it is reduced to nickel black. A uniform nickel-black graphene composite film is generated on cathode. The electrolyte concentration, deposition voltage and deposition time are adjusted to control content of nickel black-graphene composite material on the cathode. After certain period of electrodeposition, the nickel black-graphene photothermal conversion film is fully cleaned in deionized water, and then taken out and dried in oven at 60degrees Celsius for 12 hours. USE - Method for preparing nickel black-graphene composite photothermal conversion film for seawater desalination and other water treatment directions (claimed). ADVANTAGE - The method enables to prepare nickel black-graphene composite photothermal conversion film, which has improved photothermal conversion efficiency and under the light intensity of 1 sun, the energy conversion efficiency of light steam can reach 162.4%, and the steam permeability can reach 2.37kg/m2.h.