文摘
In this study, we demonstrated a highly sensitive electrochemical sensor for the determination of glucose in alkaline aqueous solution by using nickel oxide single-walled carbon nanotube hybrid nanobelts (NiO–SWCNTs) modified glassy carbon electrode (GCE). The hybrid nanobelts were prepared by the deposition of SWCNTs onto the Ni(SO4)0.3(OH)1.4 nanobelt surface, followed by heat treatment at different temperatures ranging from 400?°C to 600?°C. The NiO–SWCNTs hybrid nanobelts modified electrode prepared at 500?°C displays enhanced electrocatalytic activity towards glucose oxidation, revealing a synergistic effect between the NiO and the deposited SWCNTs. The as-fabricated nonenzymatic glucose sensor exhibits excellent glucose sensitivity (2,980?μA?cm??mM?), lower detection limit (0.056?μM, signal/noise [S/N] ratio--), and wider linear range (0.5-,300?μM). Moreover, the sensor has been successfully used for the assay of glucose in serum samples with good recovery, ranging from 96.4?% to 102.4?%.