Abstract The design and construction of efficient nanostructure-based electrocatalyst are the keys to advance in the field of electrochemical sensors. Herein, we synthesize the samarium molybdate (SmM) on a large scale via a straightforward approach. The structure of the as-prepared SmM was investigated using the in-depth electron microscopic and spectroscopic techniques. The SmM modified electrode was electrochemically studied by different voltammetry methods towards the quantitative detection of carbendazim (CDM). This SmM-based electrochemical sensor provides the high activity towards the CDM sensing with a significant decrease in oxidation potential owing to its good conductivity, high carrier mobility and large surface area. The CV results show that the electrode modified with SmM possesses a 1.97-fold increase in the current response compared to the unmodified electrode. Noteworthy, the designed sensor exhibits a dynamic working range of 0.01–22 µM, a trace level detection of 1.0 nM and good selectivity for the practical CDM sensing. The CDM modified electrode has been practically applied in the determination of CDM in environmental samples with satisfactory results.

中文翻译：

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具有丰富活性位点的钼酸钐等二维纳米片的合成：环境样品中的实时多菌灵分析

摘要 高效纳米结构基电催化剂的设计和构建是电化学传感器领域取得进展的关键。在这里，我们通过直接的方法大规模合成钼酸钐（SmM）。使用深入的电子显微镜和光谱技术研究了所制备的 SmM 的结构。通过不同的伏安法对 SmM 修饰电极进行电化学研究，以实现多菌灵 (CDM) 的定量检测。由于其良好的导电性、高载流子迁移率和大表面积，这种基于 SmM 的电化学传感器为 CDM 传感提供了高活性，并显着降低了氧化电位。CV结果表明用SmM修饰的电极具有1。与未修饰电极相比，电流响应增加了 97 倍。值得注意的是，所设计的传感器具有 0.01–22 µM 的动态工作范围、1.0 nM 的痕量级检测以及对实际 CDM 传感的良好选择性。CDM修饰电极已实际应用于环境样品中CDM的测定，结果令人满意。