▎ 摘　　要

NOVELTY - Preparing graphene comprises redoxing graphite including e.g. placing preferred graphite and grinding to obtain graphite particles in a pulverizer, and then grinding the graphene particles into a grinder to obtain graphite fine powder, adding the graphite fine powder to the oxidizing mixed solution, and then adding the mixed liquid mixed with the graphite fine powder to the stirring tank, stirring and mixing, and heating the mixed liquid by heating in a water bath, and Controlling the temperature, stirring and mixing, and oxidation reaction, using the oxidation function of the oxide to increase the spacing between the graphite layers, inserting an oxide between the graphite layer and the layer to prepare a graphite oxide mixture, pouring the graphite oxide mixture, pouring into the sieve for filtration, and then washing with water, then washing in hydrogen peroxide, subjecting net solid to low temperature drying treatment to prepare graphite oxide powder. USE - The method is useful for preparing graphene. ADVANTAGE - The method: steerable, economical; and is suitable for large-scale production, is safe to process, rapid, and simple to process; and ensures high yield. DETAILED DESCRIPTION - Preparing graphene comprises redoxing graphite including (i) placing preferred graphite Grinding to obtain graphite particles in a pulverizer, and then grinding the graphene particles into a grinder to obtain graphite fine powder; (ii) adding the graphite fine powder in the step (i) to the oxidizing mixed solution, and then adding the mixed liquid mixed with the graphite fine powder to the stirring tank, stirring and mixing, and heating the mixed liquid by heating in a water bath, and Controlling the temperature, stirring and mixing, and oxidation reaction, using the oxidation function of the oxide to increase the spacing between the graphite layers, inserting an oxide between the graphite layer and the layer to prepare a graphite oxide mixture; (iii) pouring the graphite oxide mixture in the step (ii), pouring into the sieve for filtration, and then washing for 2-3 times with water, then washing in hydrogen peroxide, further washing for 2-3 times, then washing, subjecting net solid to low temperature drying treatment to prepare graphite oxide powder; and (iv) adding the graphite oxide powder in the step (iii) to deionized water for mixing, and sequentially performing physical stripping and high temperature expansion treatment to obtain a large amount of graphene oxide; and (v) adding graphene oxide in the step (iv) to the reducing agent according to the use requirement, and performing washing and filtering.