Song Dandan, Xu Xiaoyue, Huang Xingge, Li Guoqiang, Zhao Yisong, Gao Faming
Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, Yanshan University, Qinhuangdao066004, P. R. China.
Key Laboratory of Applied Chemistry, Department of Applied Chemistry, Yanshan University, Qinhuangdao066004, P. R. China.
J Agric Food Chem. 2023 Feb 8;71(5):2600-2609. doi: 10.1021/acs.jafc.2c08818. Epub 2023 Jan 30.
Transition-metal oxides (TMOs) with a hollow multishelled structure have emerged as highly potential materials for high-performance electrochemical sensing, benefiting from their superior electronic conductivity, exceptionally large specific surface area, excellent stability, and electrochemistry properties. In particular, binary TMOs are expected to outperform unitary TMOs due to the synergistic effect of the different metals. Herein, MnCoO hollow quadruple-shelled porous micropolyhedrons (MnCoO HoQS-MPs) were prepared and employed to construct an ultrasensitive sensing platform for a multipesticide assay. Profiting from complex hollow interior structures and abundant active sites, the MnCoO HoQS-MPs manifest outstanding electrochemical properties as electrode materials for the pesticide assay. The MnCoO HoQS-MP-based biosensor demonstrated remarkable performance for monocrotophos, methamidophos, and carbaryl detection, with wide linear ranges, as well as low detection limits. This work unveils a new pathway for the ultrasensitive detection of pesticides and demonstrates tremendous potential for detecting other environmentally deleterious chemicals.
具有中空多壳结构的过渡金属氧化物（TMOs）已成为高性能电化学传感领域极具潜力的材料，这得益于其优异的电子导电性、超大的比表面积、出色的稳定性和电化学性能。特别是，二元TMOs由于不同金属的协同效应，有望优于单一TMOs。在此，制备了MnCoO中空四重壳多孔微多面体（MnCoO HoQS-MPs），并将其用于构建用于多种农药检测的超灵敏传感平台。得益于复杂的中空内部结构和丰富的活性位点，MnCoO HoQS-MPs作为农药检测的电极材料表现出出色的电化学性能。基于MnCoO HoQS-MP的生物传感器在久效磷、甲胺磷和西维因检测方面表现出卓越性能，具有宽线性范围和低检测限。这项工作揭示了农药超灵敏检测的新途径，并展示了检测其他环境有害化学物质的巨大潜力。
