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<p>Herein, a composite of carboxyl-functionalized multi-walled carbon nanotubes/leaf-like zeolitic imidazolate framework (Zn) (MWCNTs-COOH/Zn-ZIF-L) was prepared via a facile method and employed as an electrode material for the sensitive voltammetric sensing of <i>tert</i>-butylhydroquinone (TBHQ). The as-synthesized MWCNTs-COOH/Zn-ZIF-L was characterized by a suite of characterization techniques, namely field-emission scanning electron microscopy, X-ray diffraction, and energy-dispersive X-ray spectroscopy. A voltammetric sensor for TBHQ was created based on the MWCNTs-COOH/Zn-ZIF-L-modified screen-printed carbon electrode (MWCNTs-COOH/Zn-ZIF-L/SPCE), which displayed superior electro-catalytic activity for the redox process of TBHQ. The MWCNTs-COOH/Zn-ZIF-L/SPCE sensor exhibited outstanding analytical performance for the detection of TBHQ, including a broad linear range from 0.03 to 440.0&#xa0;μM, a good sensitivity of 0.0593&#xa0;μA&#xa0;μM⁻<sup>1</sup>, and a low limit of detection of 0.01&#xa0;μM. In addition, this sensor demonstrated commendable characteristics, including excellent repeatability, reproducibility, and stability. Finally, the MWCNTs-COOH/Zn-ZIF-L/SPCE sensor was successfully employed for the determination of TBHQ in real specimens.</p> Graphical abstract <p></p>

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An efficient strategy utilizing MWCNTs-COOH/Zn-ZIF-L-modified electrode for sensitive determination of tert-butylhydroquinone

  • 期刊论文

  • 发表日期：

    2026年3月16日

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  • Somayeh Tajik,
  • Fariba Garkani Nejad,
  • Fatemeh Sharifi,
  • Hadi Beitollahi

摘要

Herein, a composite of carboxyl-functionalized multi-walled carbon nanotubes/leaf-like zeolitic imidazolate framework (Zn) (MWCNTs-COOH/Zn-ZIF-L) was prepared via a facile method and employed as an electrode material for the sensitive voltammetric sensing of tert-butylhydroquinone (TBHQ). The as-synthesized MWCNTs-COOH/Zn-ZIF-L was characterized by a suite of characterization techniques, namely field-emission scanning electron microscopy, X-ray diffraction, and energy-dispersive X-ray spectroscopy. A voltammetric sensor for TBHQ was created based on the MWCNTs-COOH/Zn-ZIF-L-modified screen-printed carbon electrode (MWCNTs-COOH/Zn-ZIF-L/SPCE), which displayed superior electro-catalytic activity for the redox process of TBHQ. The MWCNTs-COOH/Zn-ZIF-L/SPCE sensor exhibited outstanding analytical performance for the detection of TBHQ, including a broad linear range from 0.03 to 440.0 μM, a good sensitivity of 0.0593 μA μM⁻1, and a low limit of detection of 0.01 μM. In addition, this sensor demonstrated commendable characteristics, including excellent repeatability, reproducibility, and stability. Finally, the MWCNTs-COOH/Zn-ZIF-L/SPCE sensor was successfully employed for the determination of TBHQ in real specimens.

Graphical abstract