▎ 摘　　要

Electrocatalytic activities of graphene nanosheets/Nile blue nanocomposite, synthesized and adsorbed simultaneously on the glassy carbon (GC-GNs-NB) electrode, are investigated. The nanocomposite was characterized by ATR-FTIR, FESEM and voltammetry. Activity of the electrode toward reduction of H2O2 and oxidation of NO2- was studied electrochemically. Values of 1.95 and 0.730 mM are found for the Michaelis-Menten constant of the electrode toward H2O2 and NO2-, respectively. Wide dynamic response ranges were observed for the electrode, with DLs of 0.22 mM H2O2 and 1.1 mM NO2-. Effect of interferences was studied. The sensor was successfully tested for H2O2 and NO2- contents in real samples, respectively.