Highly selective and efficient electrochemical sensing of ascorbic acid via CuO/rGO nanocomposites deposited on conductive fabric

A nanocomposite of CuO/rGO was prepared by a simple liquid approach. After characterization by XRD, SEM, EDS and FTIR, a facile and inexpensive route has been developed to determine ascorbic acid by modifying the surface of conductive fabric with CuO/rGO through electrochemical deposition. The synergistic effect, arising from combining the unique properties of Gr with the intriguing properties of CuO, shows highly electrocatalytic activity towards the oxidation of ascorbic acid. The electrochemical sensor showed a wide linear response in the concentration range from 500 to 2000 µM with 189.053 µM detection limit. It also exhibited good stability, reproducibility and specificity. The sensor was compared to a range of other available ascorbate sensors and found to be comparable or superior in terms of analytical performance.