Hydrothermal synthesis of glucose derived carbon surface on cupric oxide (C@CuO) nanocomposite for effective electro-oxidation of catechol

In this work, we prepared carbon surface on cupric oxide ([email protected]) utilizing facile hydrothermal with glucose as a carbon precursor and applied it in different annealing treatments (300, 400, and 500 °C). As-prepared materials were characterized by various physicochemical techniques such as FE-SEM, EDX, elemental mapping analysis, XRD, Raman, and EIS spectroscopy. The composite [email protected] annealed at 400 °C ([email protected]) shows a considerable amount of carbon surface on metal oxide (CuO) with a well-defined structure, high crystallinity, and low charge transfer resistance. The as-prepared composites were exploited to reduce the charge transfer resistance and enhance the electrocatalytic properties. Due to the promising properties of [email protected], it is utilized as an active electrode modifier ([email protected]/GCE) for the electrochemical sensing of Catechol (CC). The electrochemical experiments were performed using cyclic voltammetry (CV) and amperometric (i-t) techniques. This [email protected] composite shows an excellent activity towards the oxidation of CC compared to [email protected] & 3 respectively. In addition, the [email protected] modified GCE exhibits a substantial linear range (0.001 to 15.75 mM), sensitivity (259.19 µA mM−1 cm−2), and limit of detection (0.023 µM) respectively. Moreover, the [email protected] composite also shows the perspective applications in real samples analysis.