Figure 7.
(a) CV of 2 mM of SO32− in 0.1 M PBS (pH 7) on CuNa2(OH)4 (blue colour), Cu2O (black colour) and CuO (blue colour) modified electrodes; (b) stability studies of Cu2O, CuNa2(OH)4 and CuO modified electrodes using cyclic voltammetry in 5 mM of SO32− and (c) CVs of bare GCE (black colour) and CuO modified GCE (blue colour) in pure 0.1 M PBS; bare GCE (red colour) and (pink colour) and CuO/GCE containing 2 mM of SO32−. Scan rate = 10 mV s−1.