| Abstrakt: |
This study explores the effect of ZnO nanorods (ZnO NR) on the performance of graphene-based nanocomposite electrochemical sensors for fipronil pesticide detection. The amount of ZnO NR was varied, while the quantities of graphene and paraffin remained constant. The findings reveal that the ZnO NR-graphene electrode demonstrates exceptional sensitivity to fipronil, with an increase in ZnO NR concentration leading to enhanced sensitivity, reaching its optimal level at 0.03 g. The ZnO NR-Gr electrode was synthesized using a microwave-assisted method and characterized via SEM–EDX, FTIR, and XRD to confirm its structural and compositional properties. The electrochemical performance of the electrode was evaluated using cyclic voltammetry (CV), demonstrating a limit of detection (LoD) of 0.015 µg/L, excellent reproducibility with a relative standard deviation (%RSDR) of 1.78%, and high stability, as indicated by a Horwitz ratio of 0.0044. The electrode exhibited minimal degradation after repeated measurements, highlighting its robustness for long-term use. These results indicate that the ZnO NR-Gr composite electrode holds significant potential as an effective and reliable tool for detecting fipronil, making it suitable for applications in environmental monitoring and pesticide residue analysis. [ABSTRACT FROM AUTHOR] |
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