▎ 摘　　要

NOVELTY - The preparation method of three-dimensional macroscopic graphene involves mixing graphene oxide with a reducing agent, reacting to obtain partially reduced graphene oxide, sulfonating the partially reduced graphene oxide to obtain sulfonated graphene oxide, mixing sulfonated graphene oxide with a reducing agent, reducing to obtain sulfonated graphene, hydrothermally reacting sulfonated graphene with polyhydroxy compound, and lyophilizing. USE - Preparation of three-dimensional macroscopic graphene (claimed). ADVANTAGE - The method controls the surfaces and edges of graphene oxide sheets in different locations by the functional group, such that the crosslinking of the crosslinking agent is selectively performed, and induces the graphene sheets to exhibit orientation during construction of three-dimensional macroscopic structure, without affecting the subsequent growth of ice crystals during freeze-drying. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for three-dimensional macroscopic graphene, which comprises layered material, sulfonated graphene laminates, and polyhydroxy compound cross-linked between the laminates.