▎ 摘　　要

NOVELTY - Preparing graphene two-dimensional nano-sheet comprises: (i) adding 1 g stripped layered material into each 100-1000 ml anhydrous solvent and stirring to disperse; (ii) adding an alkali metal into the resultant dispersion (1 g alkali metal accounts for 0.25-5 g layered material), then dispersing at 10-80 degrees C by stirring or shearing at 200-20000 rotations/minute for 6-120 hours to obtain a crude product; and (iii) washing the crude product with anhydrous solvent for 3-5 times, dispersing the product in water, treating ultrasonically for 5-60 minutes, washing the product with water to pH 6-8. USE - The method is useful for preparing graphene two-dimensional nano-sheet (claimed). ADVANTAGE - The nano-sheet is simple and economical to prepare, produces high yield and suitable for large scale production.