▎ 摘　　要

Copper-graphene nanocomposite (Cu-GE) was one-pot prepared on a glassy carbon electrode (GCE) as a basal electrode by ultrasonic wave assisted electrodeposition with the choline chloride-based ionic liquid Ethaline as the supporting electrolyte. The proposed modified electrode was evaluated for the highly sensitive determination of glucose (Glc). Scanning electron microscopic measurement showed that the synthesized Cu-GE exhibit a flower-like shape. Energy dispersive X-ray spectroscopy confirmed that the petals were composed of C and Cu. Electrochemical methods were adopted to characterize the sensing properties of CuNPs-GE towards the electrocatalytic oxidation of Glc under alkaline conditions at 0.3 V in 0.1 mol L-1 potassium hydroxide. The sensor displayed a broad linearity of 5 to 900 mu mol L-1 and 900 mu mol L-1 to 11 mmol L-1 with a relatively low detection limit of 1 mu mol L-1 (S/N = 3). The response time of the CuNPs-GE modified GCE was <3 s. It was tested for the determination of Glc levels in blood serum.