▎ 摘　　要

NOVELTY - The preparation of graphene oxide/spiropyran nano composite material, involves (1) dissolving graphene oxide with toluene diisocyanate in anhydrous toluene, ultrasonically dispersing, constant stirring at 70-100 degrees C, reacting for 8-12 hours, centrifuging to obtain graphene oxide grafted toluene diisocyanate, (2) dissolving resulting reaction product and spiropyran in anhydrous toluene, constant stirring at 40-80 degrees C, reacting for 8-12 hours, centrifuging, and washing with distilled water. USE - Preparation of graphene oxide/spiropyran nano composite material (claimed). ADVANTAGE - The method enables preparation of graphene oxide/spiropyran nano composite material, with photochromic property, stable fluorescence characteristics, stable performance, and the composite material is prepared using simple, fast and efficient process, and is suitable for industrial production.