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<p>A novel non-enzymatic electrochemical glucose sensor based on NiCo alloy nanoparticles embedded on nitrogen-doped carbon nanotubes (NiCo/N-CNTs) was synthesized via a melamine-assisted pyrolysis strategy. The in situ growth approach ensures intimate contact between the metal alloy and conductive CNT network, enhancing electron transfer and catalytic activity. The as-prepared sensor exhibits excellent glucose sensing performance, including a wide linear range (5–18000 µM), low detection limit (1.7 µM, S/<i>N</i> = 3), and high sensitivities of 59.57 and 24.05 µA·mM⁻¹·cm⁻² in different concentration regions. The sensor also displays remarkable selectivity toward glucose over common interfering species. Furthermore, the sensor was successfully integrated with a smartphone-controlled portable electrochemical device, achieving accurate glucose detection. Recovery tests using serum samples yielded satisfactory results, with recovery rates ranging from 100.98% to 102.68% and RSDs below 3%, confirming the practical feasibility of the platform. This work not only provides a robust strategy for constructing high-performance non-enzymatic glucose sensors but also highlights the potential of combining nanomaterials with portable electronics for point-of-care diagnostic applications.</p> Graphical Abstract <p></p>

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MOF/Melamine Derived NiCo Alloy@N-Doped Carbon Nanotubes Nanocomposites as Effective Electrocatalysts for Glucose Sensing

  • 期刊论文

  • 发表日期：

    2025年10月16日

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  • Zhiyuan Chen,
  • Ling Wang,
  • He Lu,
  • Haoyong Yin,
  • Shengji Wu

摘要

A novel non-enzymatic electrochemical glucose sensor based on NiCo alloy nanoparticles embedded on nitrogen-doped carbon nanotubes (NiCo/N-CNTs) was synthesized via a melamine-assisted pyrolysis strategy. The in situ growth approach ensures intimate contact between the metal alloy and conductive CNT network, enhancing electron transfer and catalytic activity. The as-prepared sensor exhibits excellent glucose sensing performance, including a wide linear range (5–18000 µM), low detection limit (1.7 µM, S/N = 3), and high sensitivities of 59.57 and 24.05 µA·mM⁻¹·cm⁻² in different concentration regions. The sensor also displays remarkable selectivity toward glucose over common interfering species. Furthermore, the sensor was successfully integrated with a smartphone-controlled portable electrochemical device, achieving accurate glucose detection. Recovery tests using serum samples yielded satisfactory results, with recovery rates ranging from 100.98% to 102.68% and RSDs below 3%, confirming the practical feasibility of the platform. This work not only provides a robust strategy for constructing high-performance non-enzymatic glucose sensors but also highlights the potential of combining nanomaterials with portable electronics for point-of-care diagnostic applications.

Graphical Abstract