Abstract
In this study, a Au-Fe3O4 nanocomposite-coated carbon paste electrode was developed as a simple, inexpensive, and efficient sensor for the removal and detection of para nitrophenol in acetate buffer solution (pH = 4.5). The Au-Fe3O4 nanocomposite was green synthesized using Hyssopus Officinalis-L extract solution, and the fabricated nanocomposite was characterized by SEM, EDX, XRD, FTIR, UV–vis, and TEM analysis. The limit of detection (0.023 μM) in the concentration range (3–50 μM) was calculated at the optimum condition. The CPE/Au-Fe3O4 nanocomposite electrode shows high selectivity, stability, and reproducibility with acceptable recovery (96–112%). Furthermore, the CPE/Au-Fe3O4 nanocomposite electrode shows excellent catalytic activity for the reduction in para nitrophenol with a rate constant (k) of 0.01 min−1 and correlation coefficient R2 of 0.999.
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Ganash, A.A., Aljubairy, R.A. Efficient electrochemical detection of hazardous para-nitrophenol based on a carbon paste electrode modified with green synthesized gold/iron oxide nanocomposite. Chem. Pap. 76, 3169–3183 (2022). https://doi.org/10.1007/s11696-022-02094-3
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DOI: https://doi.org/10.1007/s11696-022-02094-3