A self-supporting material and method of graphene

The present invention discloses a method of preparing a graphene material and self-supporting, self-supporting three-dimensional structure which is formed by a graphene material grown on the graphene substrate, its preparation is heat-treated starch, washed, filtered and dried. After mixing the product with a base and then dried, baked under anaerobic conditions, washing and drying, to obtain graphene self-supporting. Compared with the conventional preparation method and large-scale industrial production of raw materials, the self-supporting graphene prepared and used on the starting material, easy to operate, simple process, low cost, graphene prepared having a self-supporting structure, etc., are particularly suitable.