A facile and sensitive electrochemical sensor for non-enzymatic glucose detection based on three-dimensional flexible polyurethane sponge decorated with nickel hydroxide

Anal Chim Acta. 2020 May 1:1109:130-139. doi: 10.1016/j.aca.2020.02.037. Epub 2020 Feb 21.


A novel three-dimensional nickel hydroxide/polyurethane (Ni(OH)2/PU) electrode was prepared by a simple and environmentally friendly method and used for non-enzymatic detection of glucose. The Ni(OH)2/PU electrode was obtained by one-pot hydrothermal method of loading nickel hydroxide on a cheap, easily available and flexible polyurethane sponge, which is facile and energy-saving. The porous structure of the polyurethane sponge provides a large surface area and a rich electrochemical active site for the electrode, which is beneficial to the oxidation reaction of glucose on the surface of the electrode with Ni(OH)2. The Ni(OH)2/PU electrode structure was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The cyclic voltammetry test was used to study the catalytic performance of Ni(OH)2/PU electrode for oxidation of glucose and the chronoamperometry was used to investigate the detection performance of Ni(OH)2/PU electrode on glucose. The results indicate that this non-enzymatic glucose sensor had a high sensitivity of 2845 μA mM-1 cm-2, a low detection limit of 0.32 μM (S/N = 3), a detection range of 0.01-2.06 mM and response time of less than 5 s. In addition, the Ni(OH)2/PU electrode had excellent selectivity, reproducibility and stability and also exhibited effective detection of glucose in fetal bovine serum (FBS). In summary, Ni(OH)2/PU electrode had broad prospects as an excellent candidate for non-enzymatic glucose sensors. The study also opens up a facile and energy-saving approach for preparing three-dimensional (3D) functionalized polymer electrode via hydrothermal method as electrochemical sensors.

Keywords: Non-enzymatic glucose detection; One-pot hydrothermal method; Polyurethane sponge; Three-dimensional nickel hydroxide/polyurethane electrode.

MeSH terms

  • Biosensing Techniques*
  • Electrochemical Techniques*
  • Electrodes
  • Glucose / analysis*
  • Hydroxides / chemistry*
  • Nickel / chemistry*
  • Polyurethanes / chemistry*


  • Hydroxides
  • Polyurethanes
  • nickel hydroxide
  • Nickel
  • Glucose