▎ 摘　　要

In this work, a glassy carbon electrode (GCE) was modified with multiwall carbon nanotubes/ionic liquid/graphene quantum dots (MWCNTs/IL/GQDs) nanocomposite. Then, the nanocomposite was decorated with nickel-cobalt nanoparticles (Ni-Co NPs), and it was used as a non-enzymatic glucose sensor. Field emission scanning electron microscopy, X-ray diffraction spectroscopy, and energy dispersive spectroscopy were employed to prove the electrodeposition of the Ni-Co NPs on the surface of MWCNTs/IL/GQDs/GCE. Also, cyclic voltammetric and amperometric methods were utilized for the investigation of the electrochemical behaviour of the Ni-Co NPs/MWCNTs/IL/GQDs/GCE for glucose oxidation. The novel amperometric sensor displayed two linear ranges from 1.0 to 190.0 mu mol L-1 and 190.0 to 4910 mu mol L-1 with a low detection limit of 0.3 mu mol L-1 as well as fast response time (2 s) and high stability. Also, the sensor showed good selectivity for glucose determination in the presence of ascorbic acid, citric acid, dopamine, uric acid, fructose, and sucrose, as potential interference species. Finally, the performance of the proposed sensor was investigated for the glucose determination in real samples. Ni-Co NPs/MWCNTs/IL/GQDs/GCE showed good sensitivity and excellent selectivity.