El Hayaoui Widad, Tajat Naoual, Talebi Jamel, El Mouhri Wail, Nadif Iliass, Idlahcen Abderahim, Bougdour Nadia, Tamimi Malika, Qourzal Samir, Assabbane Ali, Bakas Idriss
Laboratory of Applied Physical Chemistry, Faculty of Sciences Ibn Zohr University, BP 8106 Dakhla, 80060 Agadir, Morocco.
Laboratory of Applied Physical Chemistry, Faculty of Sciences Ibn Zohr University, BP 8106 Dakhla, 80060 Agadir, Morocco.
Food Chem. 2025 Sep 15;486:144651. doi: 10.1016/j.foodchem.2025.144651. Epub 2025 May 15.
The extensive use of pesticides in modern agriculture poses significant environmental and human health threats. This work aims to compare the electrocatalytic activity of structured metal molybdate nanomaterials, MMoO (M = Fe, Ni, and Zn), on the electrochemical oxidation of pyrimethanil (PYR). Among these nanomaterials, ZnMoO manifests superior performance via increasing the PYR oxidation peak currents. This is attributed to the higher crystallinity and optimized surface morphology of ZnMoO, which facilitate efficient charge transfer and promote improved electrochemical behavior. Further, ZnMoO nanomaterials have been incorporated with sulfur-doped reduced graphene oxide (S-RGO) and were employed to construct a simple ultrasensitive sensor for the electrochemical detection of PYR. The prepared ZnMoO/S-RGO/GCE electrode demonstrated excellent performance for PYR detection, with a limit of detection of 4.58 nM and a wide linear range of 0.5-100 μM, a sensitivity of 0.935 μA μM cm, and excellent reproducibility, repeatability, selectivity, and stability. Meanwhile, the real-time performance of the prepared sensor was evaluated by analyzing environmental samples, including river water, and food samples, such as tomatoes and cucumbers. The sensor demonstrated satisfactory recovery rates, ranging from 95.50 % to 101.4 %. Our work results suggest that the prepared sensor is a new strategy for the quantification of PYR in practical applications.
现代农业中农药的广泛使用对环境和人类健康构成了重大威胁。这项工作旨在比较结构化金属钼酸盐纳米材料MMoO（M = Fe、Ni和Zn）对嘧霉胺（PYR）电化学氧化的电催化活性。在这些纳米材料中，ZnMoO通过增加PYR氧化峰电流表现出卓越的性能。这归因于ZnMoO具有更高的结晶度和优化的表面形态，有利于高效的电荷转移并促进改善的电化学行为。此外，ZnMoO纳米材料已与硫掺杂还原氧化石墨烯（S-RGO）结合，并用于构建一种用于PYR电化学检测的简单超灵敏传感器。制备的ZnMoO/S-RGO/GCE电极在PYR检测中表现出优异的性能，检测限为4.58 nM，线性范围宽达0.5 - 100 μM，灵敏度为0.935 μA μM cm，具有出色的重现性、重复性、选择性和稳定性。同时，通过分析环境样品（包括河水）和食品样品（如西红柿和黄瓜）来评估制备传感器的实时性能。该传感器显示出令人满意的回收率，范围为95.50%至101.4%。我们的工作结果表明，制备的传感器是实际应用中PYR定量的一种新策略。
