▎ 摘　　要

NOVELTY - Preparing graphene, comprises (i) mixing pyridine and formic acid to obtain a mixed solvent; (ii) dispersing the oxidized graphite in the mixed solvent to obtain a mixed solution; (iii) ultrasonic dispersing the mixed solution; (iv)adding methyl silicone oil, carrying out the normal pressure reflux reaction, until the black substance does not precipitate, stopping refluxing; (v) separating and purifying the product, obtaining the pre-treated graphene, (vi) coating the pre-treated graphene on the substrate. USE - The method is useful for preparing graphene (claimed). DETAILED DESCRIPTION - Preparing graphene, comprises (i) mixing pyridine and formic acid in a ratio of 1:1-1:5 to obtain a mixed solvent; (ii) dispersing the oxidized graphite in the mixed solvent to obtain a mixed solution in which the addition ratio of the graphite oxide to the mixed solvent is 5-7 mg/ml; (iii) ultrasonic dispersing the mixed solution for 30-40 minutes; (iv) adding 0.2-0.5 ml methyl silicone oil, carrying out the normal pressure reflux reaction, until the black substance does not precipitate, stopping refluxing; (v) separating and purifying the product, obtaining the pre-treated graphene, (vi) coating the pre-treated graphene on the substrate, and (vii) pre-processing the set graphene substrate to laser reduction to obtain the graphene product.