Journal
IONICS
Volume 26, Issue 5, Pages 2599-2609Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-019-03305-w
Keywords
Copper oxide; Reduced graphene oxide; Carbon nanotubes; Hydrazine; Electrochemical sensor
Funding
- National Natural Science Foundation of China [51205274, 51602121]
- Scientific Research Starting Foundation for Professors and Doctors from Huizhou University [2019JB006]
- Program for Innovative Research Team of Huizhou University (IRTHZU)
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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 mu A center dot mu M-1 center dot cm(-2), a linear range of 1.2-430 mu M, and detection limit of 0.2 mu M 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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