文摘
A glassy carbon electrode (GCE) was modified with nickel(II) hydroxide nanoparticles and a film of molybdenum sulfide. The nanocomposite was prepared by two-step electrodeposition. Scanning electron microscopy reveals that the nanoparticles are uniformly deposited on the film. Cyclic voltammetry and chronoamperometry indicate that this modified GCE displays a remarkable electrocatalytic activity towards nonenzymatic oxidation of glucose. Response is linear in the 10-,300 μM concentration range (R 2 --.9987), the detection limit is very low (5.8?μM), response is rapid (< 2?s), and selectivity over ascorbic acid, dopamine, uric acid, fructose and galactose is very good. Figure An efficient nonenzymatic glucose sensor based on Ni(OH)2/MoSx nanocomposite modified glassy carbon electrode has been fabricated via a two-step electrodeposition approach. The resulting nonenzymatic sensor exhibits excellent properties toward glucose detection, such as low detection limit, fast response and noticeable selectivity.