Abstract
In this paper, we have synthesized the cupric oxide functionalized carbon nanotube-reduced graphene oxide (CuO/CNTs-rGO) nanocomposites by a facile one-pot method. The obtained samples were characterized by transmission electron microscope (TEM), energy-dispersive spectroscopy (EDS), and X-ray powder diffraction (XRD) techniques. To investigate the electrochemical properties, the as-fabricated sensors were tested toward hydrazine detection by cyclic voltammetry (CV) and amperometry methods. The measured results demonstrate that the CuO/CNTs-rGO nanocomposites sensor shows a sensitivity of 4.28 μA·μM−1·cm−2, a linear range of 1.2–430 μM, and detection limit of 0.2 μM toward hydrazine. The enhanced electrocatalytic activity can be attributed to the catalytic properties of CuO and synergistic effect of the ternary nanocomposites. Meanwhile, the as-fabricated CuO/CNTs-rGO sensor also displays good selectivity and long-term stability, which implies its feasibility for practical application.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (51205274, 51602121), the Scientific Research Starting Foundation for Professors and Doctors from Huizhou University (2019JB006), and Program for Innovative Research Team of Huizhou University (IRTHZU).
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Zhao, Z., Wang, W., Tang, W. et al. Synthesis and electrochemistry performance of CuO-functionalized CNTs-rGO nanocomposites for highly sensitive hydrazine detection. Ionics 26, 2599–2609 (2020). https://doi.org/10.1007/s11581-019-03305-w
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DOI: https://doi.org/10.1007/s11581-019-03305-w