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<p>Non-enzymatic glucose sensors with good electrocatalytic performance and cost-efficiency are critically important for diverse applications. However, developing such sensors through a straightforward and economical preparation method remains a significant challenge. In this study, a ZnO/NiCoO composite was synthesized using a low-cost and simple two-step approach combining hydrothermal and molten salt processes. The material was thoroughly characterized in terms of its morphology, structure, and electrocatalytic properties. Results indicate that the composite exhibits favourable sensing properties, featuring high sensitivity (139.92 μA<sup><b>.</b></sup>mM<sup>−1<b>.</b></sup>cm<sup>−2</sup>), low detection limit (1.5&#xa0;μM), rapid response time (0.8&#xa0;s), and strong stability. These favorable properties are primarily attributed to the synergistic interactions between the ZnO and NiCoO components, the open nanosheet architecture of the ZnO/NiCoO composite, and the increased Co<sup>3+</sup>/Co<sup>2+</sup> ratio. This study demonstrates the potential application of ZnO/NiCoO composites in non-enzymatic electrochemical glucose biosensors.</p>

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Development of a non-enzymatic glucose sensor with nickel–cobalt-zinc composite prepared via hydrothermal-molten salt synthesis

  • 期刊论文

  • 发表日期：

    2025年11月12日

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  • Tingting Deng,
  • Lin Zhou,
  • Shenqi Zhao,
  • Haokun Zhang,
  • Tingting Li,
  • Yongqi Li,
  • Hao Zou,
  • Xinhui Wang,
  • Jie Zhu

摘要

Non-enzymatic glucose sensors with good electrocatalytic performance and cost-efficiency are critically important for diverse applications. However, developing such sensors through a straightforward and economical preparation method remains a significant challenge. In this study, a ZnO/NiCoO composite was synthesized using a low-cost and simple two-step approach combining hydrothermal and molten salt processes. The material was thoroughly characterized in terms of its morphology, structure, and electrocatalytic properties. Results indicate that the composite exhibits favourable sensing properties, featuring high sensitivity (139.92 μA.mM−1.cm−2), low detection limit (1.5 μM), rapid response time (0.8 s), and strong stability. These favorable properties are primarily attributed to the synergistic interactions between the ZnO and NiCoO components, the open nanosheet architecture of the ZnO/NiCoO composite, and the increased Co3+/Co2+ ratio. This study demonstrates the potential application of ZnO/NiCoO composites in non-enzymatic electrochemical glucose biosensors.