▎ 摘　　要

NOVELTY - Preparation of graphene nano-belt comprises heating carbon nanotube with acid solution, soaking in alkali solution, stirring, filtering, ultrasonically cleaning, filtering, drying to constant weight, and heating with inert gas to 800-1000 degrees C for 3-5 minutes; removing carbon nanotube, setting in an environment at - 170 to - 200 degrees C for 3-5 minutes, adding ionic liquid at mass-to-volume ratio of 1 g:10-100 ml, stripping, filtering, washing, and drying to constant weight. USE - Method for preparing graphene nano-belt (claimed). ADVANTAGE - The method is simple and has better dispersion to prevent agglomeration and low demand for equipment.