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<p>The development of two-dimensional porous carbon nanosheets (mNPC) presents a promising solution to address the aggregation challenges of transition metal oxides in catalytic sensing applications. In this study, hierarchical porous carbon nanosheets were synthesized through a dual-template strategy employing octadecylamine and the block copolymer PEO-<i>b</i>-PS during pyrrole monomer polymerization under mild conditions, followed by controlled pyrolysis. Subsequent uniform dispersion of Fe<sub>3</sub>O<sub>4</sub> nanoparticles on the carbon matrix yielded an advanced mNPC/Fe<sub>3</sub>O<sub>4</sub> nanocomposite. Comprehensive characterization via field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) confirmed the successful formation of the hierarchical porous structure and homogeneous distribution of Fe<sub>3</sub>O<sub>4</sub>. Electrochemical evaluation revealed that the mNPC/Fe<sub>3</sub>O<sub>4</sub> modified glassy carbon electrode exhibited exceptional electrocatalytic performance for catechin detection, achieving an ultra-low detection limit of 0.36 nM (S/N = 3) with a broad linear response range from 0.1 nM to 1.1 μM under optimized conditions. The sensor demonstrated remarkable anti-interference in complex matrices. This work not only provides a novel strategy for food safety monitoring but also expands the application scope of conductive polymer-derived nanomaterials in electrochemical sensing platforms.</p> Graphical Abstract <p></p>

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Ultrathin polypyrrole-derived porous carbon nanosheets integrated with Fe3O4 nanoparticles for enhanced electrochemical detection of catechin

  • 期刊论文

  • 发表日期：

    2025年5月14日

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  • Yaqi Yang,
  • Zhewei Zhang,
  • Jiejun Li,
  • Zijian Zhao,
  • Yixi Xie,
  • Pengcheng Zhao,
  • Junjie Fei

摘要

The development of two-dimensional porous carbon nanosheets (mNPC) presents a promising solution to address the aggregation challenges of transition metal oxides in catalytic sensing applications. In this study, hierarchical porous carbon nanosheets were synthesized through a dual-template strategy employing octadecylamine and the block copolymer PEO-b-PS during pyrrole monomer polymerization under mild conditions, followed by controlled pyrolysis. Subsequent uniform dispersion of Fe3O4 nanoparticles on the carbon matrix yielded an advanced mNPC/Fe3O4 nanocomposite. Comprehensive characterization via field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) confirmed the successful formation of the hierarchical porous structure and homogeneous distribution of Fe3O4. Electrochemical evaluation revealed that the mNPC/Fe3O4 modified glassy carbon electrode exhibited exceptional electrocatalytic performance for catechin detection, achieving an ultra-low detection limit of 0.36 nM (S/N = 3) with a broad linear response range from 0.1 nM to 1.1 μM under optimized conditions. The sensor demonstrated remarkable anti-interference in complex matrices. This work not only provides a novel strategy for food safety monitoring but also expands the application scope of conductive polymer-derived nanomaterials in electrochemical sensing platforms.

Graphical Abstract