▎ 摘　　要

NOVELTY - A high-quality graphene is prepared by (A) preparing crude graphite alkene powder and magnesium powder; and (B) putting crude graphite alkene powder into 1-10 mol/L hydrochloric acid solution, performing magnetic force stirring for 40-80 minutes to remove unreacted metal magnesium and other soluble impurities, filtering, using deionized water to wash until neutral, placing to obtain black graphene powder at 100-150 degrees C in oven. The step (A) putting metal magnesium powder into tube-type high temperature furnace at flow rate of 50-75 mL/minute under protection of carbon dioxide. USE - Method for preparation of high-quality graphene (claimed) used for composite material in enhancing phase or drug carrier with benzene ring in light, electricity, chemistry and physics. ADVANTAGE - The method is simple, fast, safe and environment-friendly. DETAILED DESCRIPTION - High-quality graphene is prepared by (A) preparing crude graphite alkene powder and magnesium powder; and (B) putting crude graphite alkene powder into 1-10 mol/L hydrochloric acid solution, performing magnetic force stirring for 40-80 minutes to remove unreacted metal magnesium and other soluble impurities, filtering, using deionized water to wash until neutral, placing to obtain black graphene powder at 100-150 degrees C in oven. The step (A) putting metal magnesium powder into tube-type high temperature furnace at flow rate of 50-75 mL/minute under protection of carbon dioxide, and performing magnesium powder combustion at 500-800 degrees C, where flow rate of carbon dioxide is increased to 100-300 mL/minute to meet requirement of burning magnesium powder, and reacting for 20-60 hours at room temperature for directly burning and complete until the magnesium powder burn complete; and under protection of carbon dioxide at flow rate of 70-75 mL/minute, cooling to room temperature, collecting crude graphite alkene powder and magnesium powder. The metal magnesium powder has purity of 90.00-99.99%.