Kumar Kalingarayanpalayam Matheswaran Arun, Kokulnathan Thangavelu, Wang Tzyy-Jiann, Weng Cheng-Yao, Chang Yu-Hsu
Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan; Institute of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei 10608, Taiwan.
Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan.
Sci Total Environ. 2024 Nov 10;950:175301. doi: 10.1016/j.scitotenv.2024.175301. Epub 2024 Aug 5.
Two-dimensional layered semiconductor materials as a distinctive class of materials are comprehensively explored for widespread applications due to narrow bandgap, controllable morphology, and tunable metal cation composition. Herein, we constructed a sensing platform of surface enhanced Raman spectroscopy (SERS) by combination of nickel‑cobalt layered double hydroxide (NiCo-LDH) microurchins and plasmonic silver nanoparticles (Ag NPs) for fungicide detection of thiabendazole (TBZ). The NiCo-LDHs/Ag-NPs microcomposites consist of NiCo-LDHs microurchins having a large number of nanoneedles deposited with photoreduced Ag NPs. The SERS platform with NiCo-LDHs/Ag-NPs shows an excellent SERS performance for TBZ detection, including an ultra-low detection limit of 1.49 × 10 M, a sublime enhancement factor of 1.71 × 10, high uniformity, good reproducibility, and long-term storage stability. The ultrahigh SERS activity of NiCo-LDH/Ag-NPs can be attributed to strong electromagnetic enhancement in the nanoscale gaps between Ag NPs, massive charge transfer through large-area NiCo-LDH/Ag-NPs interfaces, and the synergistic action of electromagnetic and charge transfer mechanisms. Besides, the unique morphology of NiCo-LDHs/Ag-NPs microcomposite provides a broad surface area for adsorption of TBZ molecules for further Raman signal enhancement. The practicability of the proposed SERS platform is confirmed by detecting TBZ in the real samples of apple juice and river water. The exceptional self-cleaning capability of the NiCo-LDHs/Ag-NPs microcomposite with an retention rate of 81.97 % even after the fifth degradation cycle underscores its impressive sustainable reusability and cost-effectiveness. The findings in this work lay the foundation for the development of high-performance SERS platforms to ensure food safety and environmental protection.
二维层状半导体材料作为一类独特的材料，因其窄带隙、可控的形态和可调节的金属阳离子组成而被广泛探索用于各种应用。在此，我们通过将镍钴层状双氢氧化物（NiCo-LDH）微urchin与等离子体银纳米颗粒（Ag NPs）相结合，构建了一个用于噻菌灵（TBZ）杀菌剂检测的表面增强拉曼光谱（SERS）传感平台。NiCo-LDHs/Ag-NPs微复合材料由具有大量纳米针的NiCo-LDHs微urchin组成，这些纳米针上沉积有光还原的Ag NPs。具有NiCo-LDHs/Ag-NPs的SERS平台在TBZ检测方面表现出优异的SERS性能，包括超低检测限1.49×10⁻⁹ M、高达1.71×10⁶的增强因子、高均匀性、良好的重现性和长期储存稳定性。NiCo-LDH/Ag-NPs的超高SERS活性可归因于Ag NPs之间纳米级间隙中的强电磁增强、通过大面积NiCo-LDH/Ag-NPs界面的大量电荷转移以及电磁和电荷转移机制的协同作用。此外，NiCo-LDHs/Ag-NPs微复合材料的独特形态为TBZ分子的吸附提供了广阔的表面积，以进一步增强拉曼信号。通过检测苹果汁和河水的实际样品中的TBZ，证实了所提出的SERS平台的实用性。NiCo-LDHs/Ag-NPs微复合材料具有出色的自清洁能力，即使在第五次降解循环后保留率仍为81.97%强调了其令人印象深刻的可持续再利用性和成本效益。这项工作中的发现为开发高性能SERS平台奠定了基础，以确保食品安全和环境保护。
