▎ 摘　　要

NOVELTY - The preparation of graphene involves reacting magnesium powder and carbon tetrachloride to obtain magnesium chloride and carbon, using argon to bubble carbon tetrachloride liquid, reacting magnesium powder, mixing to sodium chloride powder, reacting to carry out magnesium and carbon tetrachloride reduction reaction, immersing the product in aqueous solution of dilute hydrochloric acid, dissolving chloride, and adding magnesium particles, pumping aqueous solution containing graphene, dispersing in water, filtering and dispersing black product on filter in dimethylformamide solvent. USE - Preparation of graphene with high yield by magnesium pyrolysis of carbon tetrachloride. ADVANTAGE - The method enables the preparation of graphene with high yield. DETAILED DESCRIPTION - The preparation method of graphene with high yield by magnesium pyrolysis of carbon tetrachloride, involves using raw materials comprising magnesium powder and liquid carbon tetrachloride, reacting magnesium and carbon tetrachloride to obtain magnesium chloride and carbon, using argon to bubble carbon tetrachloride liquid into the vacuum furnace, using the core of the design reaction synthesis equipment, making magnesium powder to react thoroughly, evenly mixing magnesium powder and sodium chloride powder in accordance with a certain quality ratio, reacting at 450-600 degrees C to carrying out magnesium and carbon tetrachloride reduction reaction, immersing the resulting product in aqueous solution of dilute hydrochloric acid, dissolving the chloride, and leaving small amount of magnesium particles, pumping aqueous solution containing graphene, dispersing in deionized water, filtering, removing impurity ions and ultrasonically-dispersing the black product on the filter in dimethylformamide solvent.