▎ 摘　　要

NOVELTY - Preparing graphene material by electrolytic ethylene, involves (a) adding the cathode into a cathode liquid, (b) placing the anode in anode solution, (c) separating the cathode solution and the anode solution by a membrane, (d) introducing ethylene into the anion solution, and (e) electrolyzing to obtain a graphene material. The cathode solution is a stainless steel electrode, the anodes are platinum electrodes, and the cathodes are a mixture of ion liquid dodecyl alcohol polyoxyethylene ethers and the cathode solution is an ion liquid. USE - Method for preparing graphene material by electrolytic ethylene, preferably nano device, sensor, solar cell, transistor and environment. ADVANTAGE - The method has simple operation and is environment-friendly, by controlling the gaseous carbon source ethylene gas flow and electrolytic parameter, which can effectively control the preparation of graphene carbon material. The method uses platinum electrode as anode to combine suitable type of ion liquid which has strong catalytic capability to the ethylene electrolysis. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene material, is prepared as mentioned above.