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<p>In this work, a MnO<sub>2</sub>@NiO nanocomposite was synthesized through a hydrothermal approach for non-enzymatic glucose sensing applications. The material structure and its various (hkl) planes were confirmed by the powder X-ray diffraction (PXRD). The plate-like nanosheet’s morphology and their elemental compositions were examined by the field emission scanning electron microscopy (FESEM) and energy-dispersive X-ray spectroscopy (EDX). The electrochemical properties of the prepared materials were investigated by cyclic voltammetry (CV) and amperometry. Based on their results, the prepared modified electrodes demonstrate excellent electrochemical performance for non-enzymatic glucose detection. The MnO<sub>2</sub>@NiO nanocomposite exhibits good electrochemical activity, and it has a high glucose detection sensitivity of about 723&#xa0;µA&#xa0;mM<sup>−1</sup>&#xa0;cm<sup>−2</sup> and a detection limit of 0.55&#xa0;mM with a wide linear range of 0.25–5.5&#xa0;mM. Moreover, the MnO<sub>2</sub>@NiO modified electrode demonstrates excellent repeatability, reproducibility, cyclic stability, and selectivity. It retained a high percentage of its initial current even after 15&#xa0;days. Furthermore, the anti-interference performance of the prepared MnO<sub>2</sub>@NiO modified electrode was investigated in the presence of common interfering species like sodium chloride (NaCl), uric acid (UA), potassium chloride (KCL), citric acid (CA), fructose, maltose, and ascorbic acid (AA). These results confirm that the MnO<sub>2</sub>@NiO modified electrode is an efficient and reliable candidate for non-enzymatic glucose sensing applications.</p> Graphical Abstract <p></p>

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Synthesis and characterization of MnO2@NiO nanocomposite as an electrocatalyst for enzyme-free glucose sensing applications

  • 期刊论文

  • 发表日期：

    2026年4月27日

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  • B. Suriya,
  • S. Radha,
  • B. S. Sreeja

摘要

In this work, a MnO2@NiO nanocomposite was synthesized through a hydrothermal approach for non-enzymatic glucose sensing applications. The material structure and its various (hkl) planes were confirmed by the powder X-ray diffraction (PXRD). The plate-like nanosheet’s morphology and their elemental compositions were examined by the field emission scanning electron microscopy (FESEM) and energy-dispersive X-ray spectroscopy (EDX). The electrochemical properties of the prepared materials were investigated by cyclic voltammetry (CV) and amperometry. Based on their results, the prepared modified electrodes demonstrate excellent electrochemical performance for non-enzymatic glucose detection. The MnO2@NiO nanocomposite exhibits good electrochemical activity, and it has a high glucose detection sensitivity of about 723 µA mM−1 cm−2 and a detection limit of 0.55 mM with a wide linear range of 0.25–5.5 mM. Moreover, the MnO2@NiO modified electrode demonstrates excellent repeatability, reproducibility, cyclic stability, and selectivity. It retained a high percentage of its initial current even after 15 days. Furthermore, the anti-interference performance of the prepared MnO2@NiO modified electrode was investigated in the presence of common interfering species like sodium chloride (NaCl), uric acid (UA), potassium chloride (KCL), citric acid (CA), fructose, maltose, and ascorbic acid (AA). These results confirm that the MnO2@NiO modified electrode is an efficient and reliable candidate for non-enzymatic glucose sensing applications.

Graphical Abstract