▎ 摘　　要

NOVELTY - A graphene-preparing apparatus comprises a chemical vapor deposition system including a reaction tube, which is suspended between support ends (a) and (b) forming an external reaction space. The outer reaction space is heated by a heating furnace. An air inlet is arranged at the support end (a). The inlet port allows the gas to be introduced into the external reaction space. An exhaust port is provided at the support end (b). The exhaust port allows the gas in the external reaction space to be discharged. USE - Apparatus is used for preparing graphene (claimed). DETAILED DESCRIPTION - A graphene-preparing apparatus comprises a chemical vapor deposition system including a reaction tube, which is suspended between support ends (a) and (b) forming an external reaction space. The outer reaction space is heated by a heating furnace. An air inlet is arranged at the support end (a). The inlet port allows the gas to be introduced into the external reaction space. An exhaust port is provided at the support end (b). The exhaust port allows the gas in the external reaction space to be discharged. A reactor is placed in the external reaction space and comprising a container unit and a container closure. The container closure is removably mounted to the container unit. An internal reaction space is formed in the reactor. The substrate for producing graphene is contained in the reactor. The reactor contains graphite capable of reacting with water. An INDEPENDENT CLAIM is included for preparation of graphene.