Voltammetric determination of bisphenol A at NiCo2O4/reduced graphene oxide nanocomposite modified electrode

We introduced a voltammetric bisphenol A (BPA) sensor based on NiCo2O4/reduced graphene oxide (rGO) nanocomposite loaded on the screen-printed electrode surface (NiCo2O4/rGO/SPE). NiCo2O4/rGO was characterized using various techniques, including X-ray diffraction (XRD), Raman spectroscopy and scanning electron microscopy (SEM). We used differential pulse voltammetry (DPV) to detect BPA concentrations. We evaluated the key analytical features of NiCo2O4/rGO/SPE for the BPA detection and the effects of important experimental parameters on the voltammetric efficiency. The voltammetric response of the proposed electrode was evaluated towards BPA. We demonstrated that the produced electrode has a wide linear dynamic range (0.03 to 475.0 μM) and a detection limit as low as 0.01 μM at S/N = 3.