A Facile One-Pot Synthesis of Au/Cu(2)O Nanocomposites for Nonenzymatic Detection of Hydrogen Peroxide

Au/Cu(2)O nanocomposites were successfully synthesized by a facile one-pot redox reaction without additional reducing agent under room temperature. The morphologies and structures of the as-prepared products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The electrocatalytic performance of Au/Cu(2)O nanocomposites towards hydrogen peroxide was evaluated by cyclic voltammetry (CV) and chronoamperometry (CA). The prepared Au/Cu(2)O nanocomposite electrode showed a wide linear range from 25 to 11.2 mM (R = 0.9989) with a low detection limit of 1.05 μM (S/N = 3) and high sensitivity of 292.89 mA mM(−1) cm(−2). The enhanced performance for H(2)O(2) detection can be attributed to the introduction of Au and the synergistic effect between Au and Cu(2)O. It is demonstrated that the Au/Cu(2)O nanocomposites material could be a promising candidate for H(2)O(2) detection.