A highly sensitive hydrazine and hydrogen peroxide non-enzymatic sensor based on CuO nanoplatelets

CuO nanoplatelets were synthesized via a controllable hydrothermal process. Their structure and morphology were characterized by X-ray diffraction (XRD), Raman spectroscopy, and transmission electron microscopy (TEM). The sensing activity of the CuO nanoplatelets towards the detection of hydrazine and H2O2 was investigated in a 0.1 M NaOH solution using cyclic voltammetry and amperometry. The proposed sensor exhibits a very high sensitivity: 2412 μA.mM− 1.cm− 2 for the detection of hydrazine and 1790 µA.mM− 1.cm− 2 for H2O2. The linear ranges were 0–1200 µM and 0–1800 µM, and the detection limits were 100 nM and 300 nM for hydrazine and hydrogen peroxide, respectively. Additionally, good recovery of the analyte in real water samples confirms the reliability of the prepared sensor in practical applications. The proposed sensor also showed a high selectivity. The enhanced electrocatalytic performance of the CuO nanoplatelets might be ascribed to the thin dispersed nanoplatelets which provide highly exposed active sites. These promising results could open the route for potential applications of the CuO nanoplatelet sensor in various fields such as environmental detection, industrial applications and food analyses.