School of Electrical and Information Engineering, Jiangsu University of Technology, Changzhou 213001, China.
School of Electrical and Information Engineering, Jiangsu University of Technology, Changzhou 213001, China.
Food Chem. 2025 Feb 1;464(Pt 3):141812. doi: 10.1016/j.foodchem.2024.141812. Epub 2024 Oct 28.
A novel ratiometric electrochemical sensor based on methylene blue-functionalized ZIF-8/Au nanoparticle composites (ZIF-8@MB/AuNPs) was constructed for reliable detection of methyl parathion (MP). The ZIF-8@MB/AuNPs composites were prepared by a simple and mild room-temperature method. Here, ZIF-8 was served as a support for loading functional nanomaterials, which helps to improve the adsorption and accumulation capacity for MP. The functional electroactive molecule methylene blue (MB) was adopted to produce a stable reference signal and form a ratiometric sensing strategy, offering more accurate and reliable detection results. The decoration of Au nanoparticles can effectively enhance the conductivity and catalytic activity of the composites. The obtained ZIF-8@MB/AuNPs composites exhibited a superior electrochemical catalytic performance toward MP. According to the ratiometric signal of I/I, the developed sensor offered a detection range of 0.05-30 μg mL and exhibited favorable selectivity, reproducibility and stability, and satisfactory applicability in vegetable samples.
一种基于亚甲基蓝功能化 ZIF-8/金纳米粒子复合材料（ZIF-8@MB/AuNPs）的新型比率型电化学传感器被构建用于可靠检测甲基对硫磷（MP）。ZIF-8@MB/AuNPs 复合材料通过简单温和的室温方法制备。在这里，ZIF-8 用作负载功能纳米材料的载体，这有助于提高对 MP 的吸附和积累能力。采用功能电活性分子亚甲基蓝（MB）产生稳定的参考信号并形成比率型传感策略，提供更准确和可靠的检测结果。金纳米粒子的修饰可以有效增强复合材料的导电性和催化活性。所获得的 ZIF-8@MB/AuNPs 复合材料对 MP 表现出优异的电化学催化性能。根据 I/I 的比率信号，所开发的传感器提供了 0.05-30μgmL 的检测范围，并表现出良好的选择性、重现性和稳定性，以及在蔬菜样品中的令人满意的适用性。
