State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130000, PR China.
Jilin Province Product Quality Supervision and Inspection Institute, Changchun 130000, PR China.
Food Chem. 2024 Aug 1;448:138994. doi: 10.1016/j.foodchem.2024.138994. Epub 2024 Mar 16.
Integrating a pre-enrichment step into electrochemical detection methodologies has traditionally been employed to enhance the performance of heavy metal detection. However, this augmentation also introduces a degree of intricacy into the sensing process and increases energy consumption. In this work, Mo-doped WO is grown in situ on carbon cloth by one-step electrodeposition. The electrode detect multiple heavy metal ions simultaneously in the range of 0.1-100.0 μM with LODs ranging from 11.2 to 17.1 nM. The electrode successfully detected heavy metal ions in diverse food samples. This pioneering detection strategy realized the direct and simultaneous detection of multiple heavy metal ions by utilizing the valence property of WO and oxygen vacancies generated by molybdenum doping. The Mo-WO/CC pre-enrichment-free detection electrode boasts straightforward preparation, a streamlined detection procedure, swift response kinetics, and superior performance relative to previously reported electrodes, which makes it possible to develop a portable heavy metal ion detection device.
在电化学检测方法中，传统上采用预富集步骤来提高重金属检测的性能。然而，这种增强也会增加传感过程的复杂性并增加能量消耗。在这项工作中，通过一步电沉积在碳布上原位生长 Mo 掺杂 WO。该电极可以在 0.1-100.0 μM 的范围内同时检测多种重金属离子，LOD 范围为 11.2 至 17.1 nM。该电极成功地检测了多种食品样品中的重金属离子。这种开创性的检测策略利用 WO 的价态和钼掺杂产生的氧空位，实现了多种重金属离子的直接和同时检测。Mo-WO/CC 无预富集检测电极具有制备简单、检测过程简化、响应动力学迅速以及相对于先前报道的电极性能优越的特点，这使得开发便携式重金属离子检测设备成为可能。
