Zhang Xue, Shang Yunsheng, Xie Qi, Hu Xingzhe, Wu Ke, Qu Lu-Lu, Gu Yingqiu
School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, China.
School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, China.
Talanta. 2024 Aug 15;276:126291. doi: 10.1016/j.talanta.2024.126291. Epub 2024 May 19.
Developing a Surface-enhanced Raman spectroscopy (SERS) method with excellent detecting ability, good recyclability and analyzing multiple pollutants rapidly are critical for evaluation of water quality in emergency pollution affairs. While constructing a multifunctional substrate with these characteristics to realize the application of SERS in water quality monitoring remains a challenge. In this work, a reusable Au@R-FeO/g-CN SERS substrate is prepared by loading Au nanoparticles (Au NPs) on FeO nanorings (R-FeO) and the formed Au@R-FeO is further combined with g-CN nanosheets through a simple electrostatic assembly method. The Au@R-FeO/g-CN nanocomposite presents multifunction of magnetic enrichment, SERS signal enhancement, multiple pollutants analyzing, and photocatalytic activity, which achieves quantitative detection of rhodamine B (RhB), tetracycline hydrochloride (TC), and 4-chlorophenol (4-CP), with detection limits of 5.30 × 10, 7.50 × 10, 7.69 × 10 mol/L, respectively. Furthermore, the recyclable detection capability of Au@R-FeO/g-CN for multi components is demonstrated by the strong SERS signal after 9 cycles of "detection-degradation" processes. Combined with good uniformity and stability, this SERS method based on Au@R-FeO/g-CN substrate provides a new strategy for the multi-pollutants detection and degradation in water environment.
开发一种具有出色检测能力、良好可回收性且能快速分析多种污染物的表面增强拉曼光谱（SERS）方法，对于评估突发污染事件中的水质至关重要。然而，构建具有这些特性的多功能基底以实现SERS在水质监测中的应用仍然是一项挑战。在这项工作中，通过将金纳米颗粒（Au NPs）负载在FeO纳米环（R-FeO）上制备了一种可重复使用的Au@R-FeO/g-CN SERS基底，并且通过简单的静电组装方法将形成的Au@R-FeO与g-CN纳米片进一步结合。Au@R-FeO/g-CN纳米复合材料呈现出磁富集、SERS信号增强、多种污染物分析和光催化活性等多功能特性，实现了对罗丹明B（RhB）、盐酸四环素（TC）和4-氯苯酚（4-CP）的定量检测，检测限分别为5.30×10、7.50×10、7.69×10 mol/L。此外，Au@R-FeO/g-CN在经过9次“检测-降解”循环后仍具有较强的SERS信号，证明了其对多组分的可回收检测能力。结合良好的均匀性和稳定性，这种基于Au@R-FeO/g-CN基底的SERS方法为水环境中多污染物的检测和降解提供了一种新策略。
