MIL-101/Au复合粒子的绿色合成及其对福美双的拉曼检测灵敏性

采用静电自组装方式构建了金属有机骨架(MOF)MIL-101和具有表面等离激元(SPP)的金纳米粒子(Au NPs)的复合材料,该材料可作为高灵敏度、可重复使用的表面增强拉曼散射(SERS)检测平台。在水溶液中,无需任何修饰剂,仅利用前体粒子的电负性,便成功制备了稳定的复合粒子。由于MIL-101的富集能力和Au NPs的电磁增强效应,设计的MIL-101/Au复合粒子具有超高的SERS灵敏度,对罗丹明6G(R6G)的检出限低至10^-10 mol·L^-1。同时,衬底具有出色的稳定性、良好的再现性和可回收性。此外,该基底可用于直接捕获和灵敏检测福美双等农药残留。

Green synthesis of MIL-101/Au composite particles and their sensitivity to Raman detection of thiram

Metal-organic framework (MOF) MIL-101 and surface plasmon polariton (SPP) supported gold nanoparticles (Au NPs) hybrid systems were developed as a highly sensitive and reproducible surface-enhanced Raman scattering (SERS) detection platform, in which a green electrostatic self-assembly technology was adopted to construct the substrate. In an aqueous solution, the electronegativity of the particles can be used to prepare the composite substrate without any surface modifier. Due to the enrichment capacity of MIL-101 and the electromagnetic enhancement from Au NPs, the well-designed MIL-101/Au composites possessed ultrahigh sensitivity with the detection limit of Rhodamine 6G (R6G) as low as 10^-10 mol·L^-1. Meanwhile, the substrate exhibits high stability, excellent reproducibility, and recyclability. Additionally, the novel substrate can be explored for direct capture, and sensitively detect pesticide residues such as thiram.