A reliable electrochemical sensor for detection of catechol and hydroquinone at MgO/GO modified carbon paste electrode

Herein, report a reliable, potent and more sensitive electrochemical sensor for the selective investigation of hydroquinone (HQ) and catechol (CC) at magnesium oxide and graphene oxide modified carbon paste electrode (MgO/GO/MCPE). The prepared MgO nanoparticle was confirmed by X-ray diffraction (XRD) and scanning electron microscopy with energy dispersive X-ray (SEM–EDX). The constructed electrode provides high current reaction with low detection limit for CC (0.45 µM) and HQ (0.37 µM). The effect of pH, sweep rate, concentration was carried electrochemically. The fabricated MgO/GO/MCPE depicts electrode process was adsorption controlled and gave fine electrocatalytic activity towards simultaneous electrochemical analysis of CC and HQ. The MgO/GO/MCPE exhibits excellent stability with fine selectivity and sensitivity. The analytical testing of modified electrode has been analysed in tap water sample as real sample with acceptable recovery.