Abstract:Graphene-based materials,as excellent catalysts,are widely used due to the metal-free nature of graphene which can completely prevent toxic metal leaching and the associated secondary contamination.Here,graphite oxide is obtained via modified Hummers,and is further applied to the preparation of nitrogen-doped graphene,which can efficiently activate peroxymonosulfate (PMS) to produce sulfate radicals to oxidize Orange Ⅱ solution. Nitrogen content,pH value as influencing factors of degradation effect are investigated.The results show that nitrogen-doped graphene with a high catalytic activity and Orange Ⅱ can be completely degraded within 55 min.