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<p>An electrochemical sensor was developed by utilizing graphitic carbon nitride nanosheets (g-C<sub>3</sub>N<sub>4</sub> NSs) in conjunction with zinc-cobalt zeolitic imidazolate frameworks (Zn-Co ZIFs) for the effective detection of tartrazine. The morphological characterization, and identification of functional groups of Zn-Co ZIFs/g-C<sub>3</sub>N<sub>4</sub> NSs nanocomposite were investigated using FE-SEM and FT-IR analysis. The performance of the developed sensors, which included both bare screen-printed electrodes (SPE) and Zn-Co ZIFs/g-C<sub>3</sub>N<sub>4</sub> NSs-modified SPE, was investigated and compared in terms of their ability to detect tartrazine through cyclic voltammetry. Under optimized experimental conditions, the anodic peak currents observed for tartrazine on the Zn-Co ZIFs/g-C<sub>3</sub>N<sub>4</sub> NSs/SPE demonstrated a strong linear relationship with tartrazine concentrations ranging from 0.05 to 90.0&#xa0;μM. The limit of detection for tartrazine was determined to be 0.02&#xa0;μM, indicating the sensor's high sensitivity. Moreover, the proposed sensor was successfully applied in the determination of tartrazine in water samples, showing its practical applicability in real sample analysis. This study highlights the potential of Zn-Co ZIFs/g-C<sub>3</sub>N<sub>4</sub> NSs nanocomposites in electrochemical sensing applications.</p> Graphical abstract <p></p>

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Development of a modified screen-printed electrode based on the synergistic effects of Zn-Co ZIFs and g-C3N4 for voltammetric determination of tartrazine

  • 期刊论文

  • 发表日期：

    2025年8月29日

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  • Peyman Mohammadzadeh Jahani,
  • Reza Zaimbashi,
  • Fariba Garkani Nejad,
  • Somayeh Tajik,
  • Hadi Beitollahi

摘要

An electrochemical sensor was developed by utilizing graphitic carbon nitride nanosheets (g-C3N4 NSs) in conjunction with zinc-cobalt zeolitic imidazolate frameworks (Zn-Co ZIFs) for the effective detection of tartrazine. The morphological characterization, and identification of functional groups of Zn-Co ZIFs/g-C3N4 NSs nanocomposite were investigated using FE-SEM and FT-IR analysis. The performance of the developed sensors, which included both bare screen-printed electrodes (SPE) and Zn-Co ZIFs/g-C3N4 NSs-modified SPE, was investigated and compared in terms of their ability to detect tartrazine through cyclic voltammetry. Under optimized experimental conditions, the anodic peak currents observed for tartrazine on the Zn-Co ZIFs/g-C3N4 NSs/SPE demonstrated a strong linear relationship with tartrazine concentrations ranging from 0.05 to 90.0 μM. The limit of detection for tartrazine was determined to be 0.02 μM, indicating the sensor's high sensitivity. Moreover, the proposed sensor was successfully applied in the determination of tartrazine in water samples, showing its practical applicability in real sample analysis. This study highlights the potential of Zn-Co ZIFs/g-C3N4 NSs nanocomposites in electrochemical sensing applications.

Graphical abstract