▎ 摘　　要

NOVELTY - Graphite oxide solution is subjected to suction filtration, and resultant cake is washed using diluted hydrochloric acid or acetic acid, and washed using deionized water, and ultrasonically processed to obtain monolayer graphene oxide solution. Monolayer graphene oxide solution is added to aqueous solution of reducing agent to obtain graphene solution. To obtained graphene solution, pyridine and inorganic salt are added, extracted and separated to obtain graphene pyridine. Water is then removed by distillation to obtain graphene pyridine solution. USE - Preparation of graphene pyridine solution (claimed). ADVANTAGE - The method efficiently provides graphene pyridine solution having excellent dispersion uniformity. DETAILED DESCRIPTION - Natural graphite powder is added to a mixture of calcium nitrate, potassium nitrate and sodium nitrate, to which deionized water is dripper, stirred, and temperature is controlled at 0-8 degrees C. Concentrated sulfuric acid having concentration of 98 %mass is added to the resultant mixture and stirred, such that the temperature of the system does not exceed 20 degrees C. The temperature of the system is lowered to 10-15 degrees C, and potassium permanganate is gradually added and the temperature is controlled to 20 degrees C or less. The resultant mixture is continuously stirred to obtain graphite oxide solution. The obtained graphite oxide solution is subjected to suction filtration, and the resultant cake is washed using diluted hydrochloric acid or acetic acid having concentration of 1-3 %mass, at 32-36 degrees C and further washed using deionized water, and ultrasonically processed to obtain monolayer graphene oxide solution. The obtained monolayer graphene oxide solution is added to aqueous solution of a reducing agent to obtain graphene solution. To the obtained graphene solution, pyridine and inorganic salt are added, extracted and separated to obtain graphene pyridine. Water is removed by distillation under reduced pressure to obtain graphene pyridine solution. The mass ratio of calcium nitrate, potassium nitrate and sodium nitrate is 1:2:1-1:6:5. The mass ratio of potassium nitrate and sodium nitrate is 1:1.5-1:0.2.