Electrodeposition of nickel on electrospun carbon nanofiber mat electrode for electrochemical sensing of glucose

Abstract

In this study, a novel non-enzymatic glucose sensor was successfully produced using nickel electrodeposition on an oil free carbon nanofiber (CNF) mat prepared by electrospinning method. The as-prepared Ni/CNF mat electrode was studied by means of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The characterization results showed that not only was nickel coating electrodeposited on the CNF mat but also the nickel coating was uniformly deposited on the CNF mat electrode. The electrochemical properties of Ni/CNF mat were evaluated using cyclic voltammetry (CV) and amperometry measurements. It was found that the Ni/CNF mat electrode had good electrocatalytic activity toward the oxidation of glucose and demonstrated a wide linear range of 0.002–5 mM, a low detection limit of 0.57 µM, a rapid response time (2 s), a high selectivity with no interference from other oxidable species, good reproducibility and long-term stability. Moreover, the prepared sensor was used to identify glucose in real sample species. Therefore, Ni/CNF mat electrode due to good analytical performance, cost effective and simple preparation method can be proposed as a promising sensor for non-enzymatic glucose detection.