Graphene preparation method

The invention relates to a graphene preparation method, which comprises: 1, heating metal magnesium in a carbon dioxide atmosphere so as to generate a black-white mixture through a reaction; wherein the heating temperature is 1107 DEG C or above; and 2, treating the mixture with hydrochloric acid, filtering, and drying to obtain black powder, namely graphene. The graphene preparation method provided by the invention can realize continuous reaction, and the reaction condition is simple and controllable. Meanwhile, magnesium metal forms magnesium steam at high temperature, and the magnesium steam reacts with carbon dioxide, so that the yield of graphene can be greatly improved. 一种石墨烯制备方法，包括以下步骤：步骤1、对处于二氧化碳气氛中的金属镁进行加热，从而反应生成黑白相间的混合物；其中，加热温度在1107℃以上；步骤2、将混合物用盐酸进行处理，再经过过滤、干燥步骤后得到黑色粉末，即为石墨烯。本发明的石墨烯制备方法能够连续反应，而且反条件简单可控。同时，金属镁在高温下形成镁蒸汽，镁蒸汽与二氧化碳反应，可以使石墨烯的产率大幅提升。