化学
检出限
基质(水族馆)
胶体金
共价键
纳米颗粒
共价有机骨架
吸附
拉曼散射
拉曼光谱
纳米技术
色谱法
有机化学
海洋学
材料科学
物理
光学
地质学
作者
Xinxing Jiang,Jihong Fu,Dandan Li,Wenxia Xue,Yaxue Zhang
标识
DOI:10.1080/00032719.2023.2297293
摘要
An effective and sensitive SERS substrate (TPDH-COF/Au NPs) on a covalent organic framework (TPDH-COF) decorated with gold nanoparticles (Au NPs) was fabricated via electrostatic self-assembly and successfully applied for the determination of thiabendazole (TBZ) in fruit juice. The "raspberry-like" structure SERS substrate combined the properties of the abundant "hot spots" between the Au NPs and the adsorption performance of TPDH-COFs for trace analytes. Excellent SERS performance was observed, which achieved a high enhancement factor value of 2.01 × 108 for rhodamine 6 G, with considerable reproducibility and excellent long-term stability of at least 28 d. The limit of detection was estimated to be 5 ppb for TBZ in fruit juice. The result demonstrated that the TPDH-COF/Au NPs have great potential for SERS analyses and determination of pesticide residues in foods.
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