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<p>Nb<sub>2</sub>O<sub>5</sub> decorated Reduced Graphene Oxide (Nb<sub>2</sub>O<sub>5</sub>-RGO) nanocomposites have been successfully prepared through a facile hydrothermal process, offering a synergistic hybrid structure that enhances electron-transfer efficiency and exposes abundant interfacial active sites. While Nb<sub>2</sub>O<sub>5</sub>-based materials have shown promise in electrocatalysis, their application in flavonoid sensing, particularly rutin detection, has rarely been reported, representing a key novelty of this work. Electrochemical investigation using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) demonstrates that the Nb<sub>2</sub>O<sub>5</sub>-RGO-modified glassy carbon electrode (Nb<sub>2</sub>O<sub>5</sub>-RGO /GCE) exhibits excellent electrocatalytic activity toward rutin oxidation, with an ultralow detection limit of 8.7 × 10<sup>−9</sup> M (S/N = 3), which is superior to most electrochemical platforms reported to date, further highlighting the high sensitivity. In addition, the sensor shows strong repeatability, long-term stability, and satisfactory recovery (93.6–97.2&#xa0;%) in real pharmaceutical tablet samples. Benefiting from its efficient charge-transfer pathways and robust structural stability, the Nb<sub>2</sub>O<sub>5</sub>-RGO nanocomposite represents a promising platform for practical electrochemical sensing. This work not only expands the application scope of Nb<sub>2</sub>O<sub>5</sub>-based materials, but also provides new guidance for designing high-performance metal-oxide/graphene hybrid sensors.</p>

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Preparation of Nb2O5 decorated Reduced Graphene Oxide nanocomposites and their electrochemical behaviors for efficient rutin detection

  • 期刊论文

  • 发表日期：

    2025年12月27日

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  • Liang Zhao,
  • Wen Zhang,
  • Yu Han,
  • Chenxi Hu

摘要

Nb2O5 decorated Reduced Graphene Oxide (Nb2O5-RGO) nanocomposites have been successfully prepared through a facile hydrothermal process, offering a synergistic hybrid structure that enhances electron-transfer efficiency and exposes abundant interfacial active sites. While Nb2O5-based materials have shown promise in electrocatalysis, their application in flavonoid sensing, particularly rutin detection, has rarely been reported, representing a key novelty of this work. Electrochemical investigation using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) demonstrates that the Nb2O5-RGO-modified glassy carbon electrode (Nb2O5-RGO /GCE) exhibits excellent electrocatalytic activity toward rutin oxidation, with an ultralow detection limit of 8.7 × 10−9 M (S/N = 3), which is superior to most electrochemical platforms reported to date, further highlighting the high sensitivity. In addition, the sensor shows strong repeatability, long-term stability, and satisfactory recovery (93.6–97.2 %) in real pharmaceutical tablet samples. Benefiting from its efficient charge-transfer pathways and robust structural stability, the Nb2O5-RGO nanocomposite represents a promising platform for practical electrochemical sensing. This work not only expands the application scope of Nb2O5-based materials, but also provides new guidance for designing high-performance metal-oxide/graphene hybrid sensors.