▎ 摘　　要

NOVELTY - A nitrogen-doped graphene quantum dot is prepared by hydrothermally reacting carbon source compound and dopant under alkaline condition. The carbon source compound is 1,3-dinitronaphthalene. The dopant is luminol. USE - The method is used for preparing nitrogen-doped graphene quantum dot in detecting hydrogen peroxide and as anode electrochemiluminescence probe (all claimed). ADVANTAGE - The method has high yield and simple operation. The product has high electrochemiluminescence (ECL) property under low alkaline condition, low cost, anode electrochemiluminescence performance in the presence of hydrogen peroxide, and lower initial luminous potential of anode electrochemiluminescence than anode ECL probe.