▎ 摘　　要

NOVELTY - Preparation of nitrogen-sulfur co-doped graphene comprises performing redox reaction using graphite powder as raw material to prepare graphene oxide dispersion, determining concentration of graphene oxide dispersion, determining weight of urea and sodium thiosulfate solid at graphene oxide and nitrogen-sulfur weight ratio of 1: 10-40, dissolving in distilled water, adding to graphene oxide dispersion, ultrasonically treating for 25-35 minutes, transferring to PTFE reaction kettle, putting in drying box, drying and reacting at 150-200 degrees C for 17-19 hours to obtain solid mixture, cooling to room temperature, repeatedly washing and centrifuging by ethanol and distilled water, and drying at 55-75 degrees C for 5.5-6.5 hours. USE - Method for preparing nitrogen-sulfur co-doped graphene used for degrading dye wastewater at pH of 6.0-9.0 (claimed). ADVANTAGE - The graphene has good activity and stability, and improves utilization rate of visible light of material.