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<p>A novel electrochemical sensor for catechol (CC) was developed by electrodepositing gold nanoparticles (AuNPs) on porous gallium nitride (PGaN) electrode, which was fabricated via photoelectrochemical etching. The fabricated AuNPs/PGaN electrode showed good electro-oxidation activity for CC, and the linear detection range, sensitivity and detection limit of AuNPs/PGaN electrode for CC were 0.1–49.8 µM, 0.2451 µA µM<sup>−1</sup> and 72 nM, respectively. Moreover, AuNPs/PGaN electrode had good selectivity, favorable stability and satisfactory reproducibility for the detection of CC. Further, AuNPs/PGaN electrode exhibited excellent electro-oxidation capacity for CC in tap water sample, which demonstrated the good practicability of AuNPs/PGaN electrode.</p>

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Gold nanoparticles modified porous GaN electrode for electrochemical determination of catechol

  • 期刊论文

  • 发表日期：

    2025年4月7日

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  • Xin Chen,
  • Xiaoyun Li,
  • Yan Zhang,
  • Miaorong Zhang,
  • Jianguo Tang

摘要

A novel electrochemical sensor for catechol (CC) was developed by electrodepositing gold nanoparticles (AuNPs) on porous gallium nitride (PGaN) electrode, which was fabricated via photoelectrochemical etching. The fabricated AuNPs/PGaN electrode showed good electro-oxidation activity for CC, and the linear detection range, sensitivity and detection limit of AuNPs/PGaN electrode for CC were 0.1–49.8 µM, 0.2451 µA µM−1 and 72 nM, respectively. Moreover, AuNPs/PGaN electrode had good selectivity, favorable stability and satisfactory reproducibility for the detection of CC. Further, AuNPs/PGaN electrode exhibited excellent electro-oxidation capacity for CC in tap water sample, which demonstrated the good practicability of AuNPs/PGaN electrode.