超疏水表面增强拉曼光谱(SERS)底物用于水中痕量纳米塑料的灵敏检测

IF 6.7 1区 化学 Q1 CHEMISTRY, ANALYTICAL
Feiyue Xing, Weiman Duan, Jiaxi Tang, Ying Zhou, Zeji Guo, Han Zhang, Jian Xiong, Meikun Fan
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引用次数: 0

摘要

纳米塑料作为一种普遍存在的环境污染物,由于其体积小和潜在的毒性,对生态系统和人类健康构成重大威胁。然而,由于现有分析方法的局限性,检测微量纳米塑料仍然具有挑战性。在此,我们提出了一种结合超疏水富集和SERS分析的方法来检测水环境中的痕量纳米塑料。采用液-液自组装法制备了超疏水SERS底物。超疏水性促进了分析物的富集,单层金纳米粒子(AuNPs)增强了拉曼信号。该底物对拉曼探针结晶紫(CV)的检出限达到纳摩尔(10-9 M),在40 × 40 μm2(441个点)范围内的RSD为9.96%,具有良好的灵敏度和重复性。该方法成功地检测了30 ~ 1000 nm的聚苯乙烯(PS)塑料在水中的浓度低至0.03 μg/mL。此外,在瓶装水样品中检测到纳米级聚对苯二甲酸乙二醇酯(PET)颗粒。该方法为分析环境水样中痕量纳米塑料提供了一个有前景的平台,解决了环境监测的需要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Superhydrophobic Surface-Enhanced Raman Spectroscopy (SERS) Substrates for Sensitive Detection of Trace Nanoplastics in Water

Superhydrophobic Surface-Enhanced Raman Spectroscopy (SERS) Substrates for Sensitive Detection of Trace Nanoplastics in Water
Nanoplastics, emerging as pervasive environmental pollutants, pose significant threats to ecosystems and human health due to their small size and potential toxicity. However, detecting trace levels of nanoplastics remains challenging because of limitations in the current analytical methods. Herein, we propose a method that combines superhydrophobic enrichment with SERS analysis for detecting trace nanoplastics in aqueous environments. Superhydrophobic SERS substrates were prepared by using a liquid–liquid self-assembly method. The superhydrophobicity facilitated analyte enrichment, and monolayer Au nanoparticles (AuNPs) enhanced the Raman signals. The detection limit for Raman probe crystal violet (CV) using this substrate reached nanomolar (10–9 M), with an RSD of 9.96% across a 40 × 40 μm2 area (441 spots), demonstrating excellent sensitivity and reproducibility. This method successfully detected polystyrene (PS) plastics ranging from 30 to 1000 nm in water with concentrations as low as 0.03 μg/mL. Additionally, nanoscale polyethylene terephthalate (PET) particles were detected in bottled water samples. This approach offers a promising platform for analyzing trace nanoplastics in environmental water samples and addresses the needs of environmental monitoring.
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来源期刊
Analytical Chemistry
Analytical Chemistry 化学-分析化学
CiteScore
12.10
自引率
12.20%
发文量
1949
审稿时长
1.4 months
期刊介绍: Analytical Chemistry, a peer-reviewed research journal, focuses on disseminating new and original knowledge across all branches of analytical chemistry. Fundamental articles may explore general principles of chemical measurement science and need not directly address existing or potential analytical methodology. They can be entirely theoretical or report experimental results. Contributions may cover various phases of analytical operations, including sampling, bioanalysis, electrochemistry, mass spectrometry, microscale and nanoscale systems, environmental analysis, separations, spectroscopy, chemical reactions and selectivity, instrumentation, imaging, surface analysis, and data processing. Papers discussing known analytical methods should present a significant, original application of the method, a notable improvement, or results on an important analyte.
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