▎ 摘　　要

NOVELTY - Preparation of a stable colloidal graphene dispersion liquid comprises mixing graphite raw material with an oxidant, and ultrasonically centrifuging to obtain a stable graphene oxide; under an in alkaline condition at a pH of 10-11, reacting with a reducing agent for 2-4 hours to obtain graphene; and dispersing the graphene by dissolving in a substituted naphthalene with a different hydrophilic radical in organic solvent, ultrasonically centrifuging, and washing, where the stable colloidal graphene dispersion liquid has a concentration of 0.21-0.25 mg/mL. USE - Method for the preparation of a stable colloidal graphene dispersion liquid (claimed) used for nano-electronics, sensor, compound, cell, super capacitor, and hydrogen storage material. ADVANTAGE - The method is simple and easy, does not use a special device, and is inexpensive.