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<p>A ternary composite of thiolated poly(3,4-ethylenedioxythiophene), Au, Nitrogen-doped graphene was prepared via straightforward physical mixing. The optimal conditions for the uniform loading of Au nanoparticles on the composite materials were studied. The interaction between the polymer and Au nanoparticles as well as the influence of nitrogen-doped graphene on the electrocatalytic activity of the composite materials are discussed. The results show that the thiol groups on the polymer and the N atoms in the nitrogen-doped graphene have a strong adsorption effect on the Au nanoparticles, so that the Au nanoparticles are more uniformly loaded on the surface of polymer and nitrogen-doped graphene during the mixing process. In addition, the enhanced electron transfer rate, the high dispersibility of polymer and nitrogen-doped graphene, as well as the large specific surface area and catalytic activity of Au nanoparticles improve the electrocatalytic activity of the composite materials. Under the optimal conditions, the binary composite-modified electrodes exhibit superior electrocatalytic activity with the detection linear ranges of 0.5–65&#xa0;μM, 0.02–60&#xa0;μM, 0.06–55&#xa0;μM and 0.1–70&#xa0;μM for ascorbic acid, dopamine, uric acid, and nitrite ions, respectively.</p> Graphical abstract <p></p>

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Ternary nanohybrid of thiolated PEDOT, Au, and N-Doped graphene for synergistic electroanalysis and multiple sensing of bioactive molecules

  • 期刊论文

  • 发表日期：

    2026年4月30日

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  • Ahmat Ali,
  • Zhang Guoping,
  • Ayiguli Maimaiti,
  • Li jing,
  • Li Xuan

摘要

A ternary composite of thiolated poly(3,4-ethylenedioxythiophene), Au, Nitrogen-doped graphene was prepared via straightforward physical mixing. The optimal conditions for the uniform loading of Au nanoparticles on the composite materials were studied. The interaction between the polymer and Au nanoparticles as well as the influence of nitrogen-doped graphene on the electrocatalytic activity of the composite materials are discussed. The results show that the thiol groups on the polymer and the N atoms in the nitrogen-doped graphene have a strong adsorption effect on the Au nanoparticles, so that the Au nanoparticles are more uniformly loaded on the surface of polymer and nitrogen-doped graphene during the mixing process. In addition, the enhanced electron transfer rate, the high dispersibility of polymer and nitrogen-doped graphene, as well as the large specific surface area and catalytic activity of Au nanoparticles improve the electrocatalytic activity of the composite materials. Under the optimal conditions, the binary composite-modified electrodes exhibit superior electrocatalytic activity with the detection linear ranges of 0.5–65 μM, 0.02–60 μM, 0.06–55 μM and 0.1–70 μM for ascorbic acid, dopamine, uric acid, and nitrite ions, respectively.

Graphical abstract