Constructing a novel enzyme-free electrode for sensitive and selective detection of hydrazine (N₂H₄) in neutral medium is important. In this paper, Copper sulfide (CuS) with different morphologies were synthesized for electrochemical sensing of N₂H₄. A facile hydrothermal approach is developed for the shape-controlled synthesis of CuS architectures. The effects of reaction temperature, time, solvent and anion type on the morphologies of CuS were studied and it was found that CuS with flower-like, nanoparticle-like, rod-like and multilayered-like morphologies could be selectively prepared by just changing the type of metal precursor. The electrochemical performances of various CuS structures were investigated, which showed that flower-like CuS exhibited higher electrocatalytic activity toward N₂H₄ oxidation and could offer superior analytical performances with a wide linear range of 0.5 μM to 4.775 mM, a high sensitivity of 359.3 μA mM⁻¹ cm⁻² and a low detection limit of 0.097 μM (S/N = 3). Moreover, the application of the sensor for detecting N₂H₄ in tap water samples was demonstrated and the good recovery obtained made it a great potential for practical use.

构建一种新型的无酶电极，用于在中性介质中灵敏和选择性地检测肼（N ₂ H ₄）。本文合成了不同形态的硫化铜（CuS），用于N ₂ H _4的电化学传感。。开发了一种简便的水热方法，用于CuS体系结构的形状控制合成。研究了反应温度，时间，溶剂和阴离子类型对CuS形态的影响，发现只需改变反应温度就可以选择性地制备出具有花状，纳米粒子状，棒状和多层状形态的CuS。金属前驱体的类型。研究了各种CuS结构的电化学性能，结果表明花状CuS对N ₂ H _4的氧化表现出更高的电催化活性，并且可以在0.5μM至4.775 mM的宽线性范围内提供出色的分析性能，灵敏度高达359.3 μA毫米^-1 厘米^-2低检测限为0.097μM（S / N = 3）。此外，还演示了该传感器在自来水样品中检测N ₂ H ₄的应用，并获得了良好的回收率，使其具有很大的实际应用潜力。