▎ 摘　　要

NOVELTY - A single-phase carbon precursor is obtained by low-temperature pyrolysis using hydrocarbon solvent. Then, the single-phase carbon precursor is cooled, solidified and the surface of the single-phase carbon precursor is etched using an aqueous solution, to obtain graphene material. USE - Production of graphene material used in optics and electromagnetic fields. ADVANTAGE - The method effectively provides graphene material exhibiting optical luminescence and electromagnetism.