▎ 摘　　要

NOVELTY - The method for preparing graphene by redox method, involves mixing sodium selenate and nickel salt to obtain acidic mixture, mixing graphite powder and potassium permanganate, insulating, cooling to room temperature to obtain reaction product, mixing evenly ice and hydrogen peroxide to obtain ice water mixture, mixing reaction product and ice water mixture, washing with hydrochloric acid and water to obtain pre-product, freeze-drying to obtain oxide graphene powder, preparing oxidized graphene solution, adding ascorbic acid and drying to obtain graphene powder. USE - Method for preparing graphene by redox method. DETAILED DESCRIPTION - Method for preparing graphene by redox method, involves (a) mixing sodium selenate and nickel salt in a mass ratio of 10:1-8:1 to obtain acidic mixture, (b) mixing graphite powder and potassium permanganate in mass ratio of 1:3-1:8 in a reaction kettle, (c) adding obtained acidic mixture to reaction kettle, heating at less than 40 degrees C, fully mixing, heating at 50-65 degrees C, insulating for 12 hours, naturally cooling to room temperature to obtain reaction product, (d) mixing evenly ice and hydrogen peroxide in a mass ratio of 140:1-100:1 to obtain ice water mixture, (e) mixing the reaction product and ice water mixture in volume ratio of 1:1, fully stirring until gas is not produced, centrifuging, separating lower layer of sediment, washing with hydrochloric acid and water to obtain pre-product, (f) dialyzing for 2 days, freeze-drying to obtain oxide graphene powder, (g) preparing oxidized graphene solution using obtained graphene powder, adding ascorbic acid, heating at 80 degrees C for 30 minutes, centrifuging and separating, washing and drying to obtain graphene powder.