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<p>In this work, we prepared an innovative nanocomposite by integrating stellate monodisperse mesoporous silica nanospheres (SMMS) into the high-purity whisker carbon nanotubes (WCT) networks through an efficient ultrasonic-assisted process. This nanocomposite was employed as sensing sensitizer to modify glassy carbon electrode (GCE) for the fabrication of highly sensitive WCT@SMMS/GCE sensing platform for electrochemical analysis of gallic acid (GA). SMMS showed more complex and richly connected pore structure with large pore size and high porosity, which might be beneficial for the adsorption of GA. WCT with good dispersibility could enhance the efficiency of charge transport. Moreover, WCT with multi-layered hollow structure had extremely high electrolyte adsorption capacity, which promoted the penetration of electrolyte for the efficient enrichment of GA molecules on electrode surface. The WCT@SMMS/GCE sensor demonstrated excellent GA electrochemical detection performance (LOD: 8.99&#xa0;nM, GA concentration: 0.1–20&#xa0;µM). Additionally, the developed sensor with good repeatability and anti-interference performance obtained satisfactory recovery rates of 94.08–104.78% and RSD values of 1.34–4.84 for the GA quantitative analysis in food samples.</p>

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Fabrication of gallic acid electrochemical sensor based on stellate monodisperse mesoporous silica nanospheres decorated whisker carbon nanotubes networks

  • 期刊论文

  • 发表日期：

    2025年7月5日

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  • Mengyuan Zhao,
  • Peng Zhang,
  • Tingting Wu,
  • Wenwen Cao,
  • Xinya Xu,
  • Ang Li,
  • Qiang Li,
  • Hongyuan Zhao

摘要

In this work, we prepared an innovative nanocomposite by integrating stellate monodisperse mesoporous silica nanospheres (SMMS) into the high-purity whisker carbon nanotubes (WCT) networks through an efficient ultrasonic-assisted process. This nanocomposite was employed as sensing sensitizer to modify glassy carbon electrode (GCE) for the fabrication of highly sensitive WCT@SMMS/GCE sensing platform for electrochemical analysis of gallic acid (GA). SMMS showed more complex and richly connected pore structure with large pore size and high porosity, which might be beneficial for the adsorption of GA. WCT with good dispersibility could enhance the efficiency of charge transport. Moreover, WCT with multi-layered hollow structure had extremely high electrolyte adsorption capacity, which promoted the penetration of electrolyte for the efficient enrichment of GA molecules on electrode surface. The WCT@SMMS/GCE sensor demonstrated excellent GA electrochemical detection performance (LOD: 8.99 nM, GA concentration: 0.1–20 µM). Additionally, the developed sensor with good repeatability and anti-interference performance obtained satisfactory recovery rates of 94.08–104.78% and RSD values of 1.34–4.84 for the GA quantitative analysis in food samples.