▎ 摘　　要

NOVELTY - Preparation of three-dimensional graphene stainless steel substrate involves removing oxide film on surface of stainless steel substrate, cleaning with acetone and distilled water, surface processing into array convex-concave structure, soaking copper foil substrate in glacial acetic acid, removing oxide film on surface, putting into tubular reaction furnace, heating, filling argon gas and hydrogen gas, introducing methane and hydrogen gas, reacting, cooling to room temperature, taking out from furnace and rotary coating three-dimensional graphene surface with polymethyl methacrylate. USE - Method for preparing three-dimensional graphene stainless steel substrate used for bionic structure, solar energy battery, sensor, high performance nanoelectronic device and composite material. ADVANTAGE - The substrate has good hydrophobicity. DETAILED DESCRIPTION - Preparation of three-dimensional graphene stainless steel substrate comprises removing oxide film on surface of stainless steel substrate, cleaning with acetone and distilled water, surface processing into array convex-concave structure, soaking copper foil substrate in glacial acetic acid for 30 minutes, removing oxide film on surface, putting into tubular reaction furnace, heating to 900-1000 degrees C, filling argon gas at gas flow rate of 10-30 standard cubic centimeters per minute (sccm) and hydrogen gas at flow rate of 40-50 sccm for 40 minutes, introducing methane and hydrogen gas at flow rate of 10-15 sccm, reacting at 1000 degrees C, cooling to room temperature, taking out from furnace, rotary coating three-dimensional graphene surface with polymethyl methacrylate, curing at 150 degrees C, etching using 1 mol/L etching agent, cleaning with deionized water, removing etching agent, setting on stainless steel substrate surface, nitrogen blow-drying surface water, standing at room temperature to dry, removing polymethyl methacrylate layer and vacuum heat-treating at 350 degrees C.