Electrochemical detection of bisphenol a on a MWCNTs/CuFe2O4 nanocomposite modified glassy carbon electrode

Abstract

In the present study, a novel electrochemical sensor based on glassy carbon electrode (GCE) modified by multi-walled carbon nanotubes/copper ferrite (MWCNTs/CuFe2O4) nanocomposite was introduced for detection of bisphenol A (BPA). The nanocomposite was prepared by citrate sol-gel method and then characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and energy-dispersive X-ray (EDX) systems. Electrochemical characterizations of the bare and modified electrodes were explored with cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) methods. Also, the peak current of differential pulse voltammetry (DPV) of BPA was increased linearly with its concentration in the ranges of 0.01–120 μM with a low detection limit of 3.2 nM (S/N = 3). Good selectivity and acceptable reproducibility were also attained on the proposed sensor. Finally, this sensor was successfully employed for the BPA determination in different real samples.