科研之友
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摘要
We report a simple and large-scale fabrication of carbon-coated Cu/Cu2O nanocomposite materials (Cu/Cu2O@carbon) and their application as sensing materials for hydrazine detection in a neutral medium. The Cu/Cu2O@carbon nanocomposite structures were successfully synthesized using a facile, cost-effective calcination method. The morphology, crystalline structure, and composition of the prepared Cu/Cu2O@carbon were characterized by scanning electron microscopy, X-ray diffraction, energy dispersive spectroscopy and high-resolution transmission electron microscopy. The hydrazine electrochemical sensor was fabricated by painting Cu/Cu2O@carbon on a glassy carbon electrode and immobilized using Nafion. By optimizing the Cu/Cu2O@carbon modified quantity and evaluating the performance using cyclic voltammetry and amperometry techniques, we demonstrated an optimal hydrazine electrochemical sensor with a high sensitivity of 2.37 mu A mu M-1 cm(-2), an excellent linear concentration range of 0.25 mu M to 800 mu M, and a low detection limit of 0.022 mu M.
