▎ 摘　　要

NOVELTY - The preparation method of graphene involves (1) mixing a carbon source, carrier gas and additive according to a certain proportion in a buffer tank, preheating by a heat exchanger, passing into a plasma generator, where the discharge voltage of the plasma generator is 360-100 kV, the current is 0.1-100 A, and the temperature is 800-6500 degrees C, and (2) pulverizing the carbon source by plasma generator, adding to a fluidized bed device to promote cracking of carbon source and nucleation and growth of graphene, separating the reacted gas-solid mixture and graphene through a cyclone separator, circulating into a buffer tank after the exhaust gas is separated by the cyclone separator, and passing into the plasma generator for recycling with the mixed gas. USE - Preparation method of graphene. ADVANTAGE - The method enables preparation of graphene which does not require harsh conditions and produce waste, and recycles portion of un-cracked carbon source.