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<p>Non-enzymatic electrochemical sensors offer advantages such as simplicity, stability, and low cost, yet they still suffer from limitations including low sensitivity, poor anti-interference ability, and insufficient cycling stability. To address these issues, this study developed a ternary carbon-doped Cu/Cu<sub>2</sub>O@MOF(Cu-BDC) nanosheet via a synergistic strategy of “in situ carbon doping + morphological transformation + MOF interface engineering” for ultrasensitive dual detection of glucose and H<sub>2</sub>O<sub>2</sub>. The optimized electrode demonstrated exceptional performance: a linear range of 0.3–3500&#xa0;μM, sensitivity of 11,099 μA·mM<sup>−1</sup>·cm<sup>−2</sup>, and a detection limit of 0.0207&#xa0;μM for glucose detection; and a linear range of 0.2–4000&#xa0;μM, sensitivity of 15,904 μA·mM<sup>−1</sup>·cm<sup>−2</sup>, and a detection limit of 0.0162&#xa0;μM for H<sub>2</sub>O<sub>2</sub> detection. Real-sample tests confirmed high accuracy (recoveries of 98.70–102.7%), strong anti-interference capability, and excellent stability. This research provides an innovative strategy to overcome the key limitations of copper-based sensing materials.</p> Graphical Abstract <p></p>

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Interface engineering of carbon-doped Cu/Cu2O@MOF(Cu-BDC) nanosheets for ultrasensitive dual detection of glucose and H2O2

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • Yanhui Feng,
  • Xiumei Lin,
  • Hongxu Guo

摘要

Non-enzymatic electrochemical sensors offer advantages such as simplicity, stability, and low cost, yet they still suffer from limitations including low sensitivity, poor anti-interference ability, and insufficient cycling stability. To address these issues, this study developed a ternary carbon-doped Cu/Cu2O@MOF(Cu-BDC) nanosheet via a synergistic strategy of “in situ carbon doping + morphological transformation + MOF interface engineering” for ultrasensitive dual detection of glucose and H2O2. The optimized electrode demonstrated exceptional performance: a linear range of 0.3–3500 μM, sensitivity of 11,099 μA·mM−1·cm−2, and a detection limit of 0.0207 μM for glucose detection; and a linear range of 0.2–4000 μM, sensitivity of 15,904 μA·mM−1·cm−2, and a detection limit of 0.0162 μM for H2O2 detection. Real-sample tests confirmed high accuracy (recoveries of 98.70–102.7%), strong anti-interference capability, and excellent stability. This research provides an innovative strategy to overcome the key limitations of copper-based sensing materials.

Graphical Abstract