In this work, the nanosheet‐assembled lindgrenite microflowers (chemical formula: Cu₃Mo₂O₉) were synthesised through a simple process and low‐cost raw materials at room temperature in aqueous solution without using any surface‐active agent. The tightly interlaced nanosheets, like petals, can increase the specific surface area, which can bring about higher electrocatalytic activity and electroanalysis sensitivity. Thus, lindgrenite microflowers were prepared as an electrochemical sensor and successfully applied in the detection of paracetamol through the modified glass carbon electrode. Furthermore, this electrochemical reaction process was simulated at the ab‐initio level to reveal the catalytic mechanism, and the simulation results agreed well with electrochemical experiments. The electrochemical performance of the lindgrenite microflowers modified glassy carbon electrode (GCE) was studied by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The linearity of paracetamol ranged from 0.05 to 1200 μM (IT method) and 0.05 to 1000 μM (DPV method), low detection limit (0.01 μM) and high sensitivity (5.11 mA mM⁻¹ cm⁻²) towards paracetamol. Moreover, this sensor was applied to detect paracetamol in human blood serum samples. The excellent results demonstrated that the prepared electrode not only showed a desirable linear range towards paracetamol but also exhibited practical applicability and reliability towards human serum samples detection.

中文翻译：

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纳米片自组装菱镁矿微花的电催化氧化及对乙酰氨基酚的灵敏测定

在这项工作中，纳米片组装的菱镁矿微花（化学分子式：Cu ₃ Mo ₂ O ₉）是通过简单的方法和低成本的原料在室温下于水溶液中合成的，无需使用任何表面活性剂。紧密交织的纳米片（如花瓣）可以增加比表面积，从而带来更高的电催化活性和电分析灵敏度。因此，制备了闪锌矿微花作为电化学传感器，并成功地用于通过修饰的玻璃碳电极检测扑热息痛。此外，从头开始模拟了该电化学反应过程以揭示催化机理，并且模拟结果与电化学实验吻合得很好。采用循环伏安法（CV）和电化学阻抗谱（EIS）研究了绿钙石微花修饰玻碳电极（GCE）的电化学性能。对乙酰氨基酚的线性范围为0.05至1200μM（IT方法）和0.05至1000μM（DPV方法），低检测限（0.01μM）和高灵敏度（5.11 mA mM）^-1 cm ^-2）对乙酰氨基酚。此外，该传感器用于检测人血清样品中的扑热息痛。优异的结果表明，制备的电极不仅显示出对乙酰氨基酚的理想线性范围，而且显示出对人血清样品检测的实用性和可靠性。