| Summary: | In this paper, a Ni and diamond-like carbon (DLC)-modified TiO<sub>2</sub> nanotube composite electrode was prepared as a glucose sensor using a combination of an anodizing process, electrodeposition, and magnetron sputtering. The composition and morphology of the electrodes were analyzed by a scanning electron microscope and energy dispersive X-ray detector, and the electrochemical glucose oxidation performance of the electrodes was evaluated by cyclic voltammetry and chronoamperometry. The results show that the Ni-coated DLC-modified TiO<sub>2</sub> electrode has better electrocatalytic oxidation performance for glucose than pure TiO<sub>2</sub> and electrodeposited Ni on a TiO<sub>2</sub> electrode, which can be attributed to the synergistic effect between Ni and carbon. The glucose test results indicate a good linear correlation in a glucose concentration range of 0.99–22.97 mM, with a sensitivity of 1063.78 μA·mM<sup>−1</sup>·cm<sup>−2</sup> and a detection limit of 0.53 μM. The results suggest that the obtained Ni-DLC/TiO<sub>2</sub> electrode has great application potential in the field of non-enzymatic glucose sensors.
|
|---|