▎ 摘　　要

NOVELTY - Manufacture of nano-graphene sheets, involves: intercalating and oxidizing a graphite material to form a graphite oxide by mixing the graphite material with at least one intercalation agent and at least one oxidant; contacting the graphite oxide with a heat source to thermally flake the graphite oxide to a set of nano-graphite sheets; suspending the nano-graphite sheets in a liquid medium and applying a mechanical shear force to mechanically flake the nano-graphite sheets such that a lateral size and a thickness of the nano-graphite sheets are reduced. USE - The method is useful for manufacturing nano-graphene sheets (claimed). ADVANTAGE - The method efficiently produces improved nano-graphene sheets having more uniform particle size and specific surface area. DETAILED DESCRIPTION - Manufacture of nano-graphene sheets, involves: intercalating and oxidizing a graphite material to form a graphite oxide by mixing the graphite material with at least one intercalation agent and at least one oxidant; contacting the graphite oxide with a heat source to thermally flake the graphite oxide to a set of nano-graphite sheets; suspending the nano-graphite sheets in a liquid medium and applying a mechanical shear force to mechanically flake the nano-graphite sheets such that a lateral size and a thickness of the nano-graphite sheets are reduced to form a nano-graphene suspension solution; separating the nano-graphene sheets from the nano-graphene suspension solution and drying the nano-graphene sheets; placing the nano-graphene sheets into a reductant atmosphere and heating up to a heat treatment temperature to reduce an oxygen content of the nano-graphene sheets so as to decrease crystal defects.