Highly Electrocatalytic Oxidation of Bisphenol A at Glassy Carbon Electrode Modified with Metal-organic Framework MOF-508a and its Application in Real Sample Analysis

The use of MOF-508a as a sensing component for the precise discerning of bisphenol A via the electrochemical technique, and its synthesis by a simple method are reported in the present study. Scanning electron microscopy (SEM) and x-ray diffraction (XRD) were applied to describe the MOF-508a’s composition and structure. In addition, MOF-508a was employed so that the glassy carbon electrode could be altered for the electrochemical oxidation of bisphenol A. The results were indicative of illustration of obvious oxidation peak with lowering over-potential by the designed MOF-508a/GCE. In addition, there was a greater signal response compared to the unmodified electrode which was primarily attributed to the large active surface area provided by MOF-508a. As such, this process led to a considerable improvement in the electrochemical surface area. Moreover, adding the elevating bisphenol A concentration resulted in a severe elevation in the anodic peak, presented by the measurements of differential pulse voltammetry (DPV). Furthermore, excellent sensitivity (0.0564 μA μM-1) with a low limit of detection (0.03 μM), a wide linear range (0.1-700.0 μM), and a high selectivity were found for the analytical performance of the modified electrode.