LAUSR

In this paper, a non-enzymatic glucose sensor based on a g-C3N4/NiO/CuO nanocomposite immobilized on a glassy carbon electrode was developed. Field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX) were utilized for characterization of the synthesized g-C3N4/NiO/CuO nanocomposite. The electrocatalytic activity of the nanocomposite was investigated by cyclic voltammetry, and amperometric technique was applied for monitoring of glucose in alkaline medium. The as-prepared g-C3N4/NiO/CuO/glassy carbon electrode exhibited the better electrocatalytic performance compared with g-C3N4, g-C3N4/CuO and g-C3N4/NiO based glassy carbon electrodes. Under optimized conditions, the proposed sensor offered a linearity ranging from 0.4 μM to 8.5 mM with detection limit of 0.1μM and sensitivity of 362.12 μA.mM-1.cm-2. Importantly, the constructed sensor displayed favorable reproducibility, outstanding selectivity and long term performance. These results reveal that the presented sensor is a promising candidate for blood glucose sensing.