▎ 摘　　要

NOVELTY - Preparing graphene includes respectively weighing soluble inorganic salt and/or soluble organic compound and expanded graphite; adding the soluble inorganic salt and/or the soluble organic compound and the expanded graphite into distilled water, heating, mixing uniformly, placing into a drying box until the water is volatilized completely to obtain the mixture of the expanded graphite and the inorganic salt and/or the organic compound, ball milling; and separating ball-milling products, washing with distilled water, performing suction filtration and drying to obtain the graphene. USE - Method for preparing graphene (claimed). ADVANTAGE - The method is simple, environment-friendly, and easy to operate, and has no special requirement to the equipment, low cost and high efficiency. DETAILED DESCRIPTION - Preparing graphene comprises: (A) respectively weighing soluble inorganic salt and/or soluble organic compound and expanded graphite according to the mass ratio of the soluble inorganic salt and/or the soluble organic matter to the expanded graphite of 10:1-200:1, where the expanded graphite serves as a raw material; (B) adding the soluble inorganic salt and/or the soluble organic compound and the expanded graphite into distilled water, heating, mixing uniformly until the soluble inorganic salt and/or the soluble organic compound are dissolved completely, placing into a drying box until the water is volatilized completely to obtain the mixture of the expanded graphite and the inorganic salt and/or the organic compound, placing the mixture into a ball-milling tank and performing ball milling; and (C) separating ball-milling products, washing with distilled water for 3-5 times, performing suction filtration and drying to obtain the graphene.