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<p>In this study, a photoelectrochemical sensor for the detection of glucose was developed by combining the unique properties of NH<sub>2</sub>-MIL-125 and Ti<sub>3</sub>C<sub>2</sub> film. The relationship between the microstructure of the samples and their performance in glucose detection was investigated. Experimental results demonstrated a linear decrease in the differential pulse voltammetry current of the Ti<sub>3</sub>C<sub>2</sub>/NH<sub>2</sub>-MIL-125-3 photoelectrochemical sensor with increasing glucose concentration. Below 200&#xa0;μM, the relationship between DPV current and glucose concentration was found to be: I (mA) = −&#xa0;3.86667 × 10<sup>–8</sup>·c<sub>g</sub> (μM) + 3.66 × 10<sup>–4</sup> (c<sub>g</sub> denoted as the concentration of glucose). Above 200&#xa0;μM, the relationship was: I (mA) = −&#xa0;4.03049 × 10<sup>–8</sup>·c<sub>g</sub> (μM) + 3.68268 × 10<sup>–4</sup>. Density functional theory calculations were in agreement with the experimental data. The Ti<sub>3</sub>C<sub>2</sub>/NH<sub>2</sub>-MIL-125-3 photoelectrochemical sensor demonstrates exceptional glucose detection capability. This technology has the potential to advance the development of MXenes/MOFs-based photoelectrochemical biosensors.</p>

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NH2-MIL-125/Ti3C2 composite film as a ultrasensitive photoelectrochemical glucose sensor

  • 期刊论文

  • 发表日期：

    2025年7月7日

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  • Zi-Yan Li,
  • Ya-Jun Li,
  • Wei Li,
  • Ze-Hong Wang,
  • Zhao-Ye Zhao,
  • Ting-Ting Zhou,
  • Yi-Rui Huang,
  • Xiang-Feng Wu,
  • Peng-Liang Zhang,
  • Zi-Yan Zhen,
  • Li-Jie Ci

摘要

In this study, a photoelectrochemical sensor for the detection of glucose was developed by combining the unique properties of NH2-MIL-125 and Ti3C2 film. The relationship between the microstructure of the samples and their performance in glucose detection was investigated. Experimental results demonstrated a linear decrease in the differential pulse voltammetry current of the Ti3C2/NH2-MIL-125-3 photoelectrochemical sensor with increasing glucose concentration. Below 200 μM, the relationship between DPV current and glucose concentration was found to be: I (mA) = − 3.86667 × 10–8·cg (μM) + 3.66 × 10–4 (cg denoted as the concentration of glucose). Above 200 μM, the relationship was: I (mA) = − 4.03049 × 10–8·cg (μM) + 3.68268 × 10–4. Density functional theory calculations were in agreement with the experimental data. The Ti3C2/NH2-MIL-125-3 photoelectrochemical sensor demonstrates exceptional glucose detection capability. This technology has the potential to advance the development of MXenes/MOFs-based photoelectrochemical biosensors.