▎ 摘　　要

NOVELTY - Preparation of graphene quantum dot fluorescent material comprises taking polycyclic aromatic hydrocarbon (PAH) as reaction precursor, nitric acid as nitrating agent, and sodium sulfite as catalyst; weighing PAH, nitric acid, and sodium sulfite according to ratio (g:l:kg) of 1000:(50-80):(4-10); reacting PAH and nitric acid at 40-80 degrees C to obtain nitro-functionalized PAH; filtering and removing acid to obtain reactant; reacting reactant with sodium sulfite at 150-230 degrees C; cooling; filtering; and drying. USE - Preparation of graphene quantum dot fluorescent material. ADVANTAGE - The method produces quantum dot material that can be stably dispersed in water, has stable structure, is acid and alkali corrosion resistant, is non-toxic, has optical properties, has small size, and has surface rich in sulfonic acid groups. It has simple process, mild reaction condition, high yield, and cheap raw materials. It is environment friendly, does not produce waste discharges, has low energy consumption, less equipment and personnel requirement, and is suitable for industrial production. DETAILED DESCRIPTION - Preparation of graphene quantum dot fluorescent material comprises taking polycyclic aromatic hydrocarbon (PAH) as reaction precursor, nitric acid as nitrating agent, and sodium sulfite as catalyst; weighing PAH, nitric acid, and sodium sulfite according to ratio (g:l:kg) of 1000:(50-80):(4-10); reacting PAH and nitric acid at 40-80 degrees C to obtain nitro-functionalized PAH; filtering and removing acid to obtain reactant; reacting reactant with sodium sulfite at 150-230 degrees C for hydrothermal reaction; cooling; filtering; and drying to obtain graphene quantum dot fluorescent material with sulfonic acid interfacing functional group.