| 摘要 |
<p>The present invention relates to a method for preparing graphene, comprising: a first step for manufacturing graphite slurry by mixing graphite with sulfuric acid and expanding the graphite; a second step for adding one selected from the group consisting of permanganic acid, permanganate, permanganate sulfuric acid and combinations thereof to the graphite slurry to induce reaction; a third step for inputting water into a reaction mixture in the second step to induce a reaction; a fourth step for inputting an aqueous solution of hydrogen peroxide into the reaction mixture in the third step to induce an oxidation; a fifth step for filtering the reaction mixture in the fourth step, dispersing the acquired filtrate in hydrochloric acid and filtering the filtrate again; a sixth step for manufacturing graphite oxide by drying the filtrate acquired in the fifth step; a seventh step for exfoliating the graphite oxide by treating the graphite oxide with supersonic waves; and an eighth step for manufacturing the graphene by reducing the exfoliated graphite oxide using a reducing agent. The method for manufacturing graphene can mass produce graphene safely and economically.</p> |
