| Autor: |
Xiaoya Yuan, Weihua Wang, Mantang Chen, Lijin Huang, Qin Shuai, Lei Ouyang |
| Předmět: |
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| Zdroj: |
Chemical Communications; 8/28/2024, Vol. 60 Issue 67, p8840-8843, 4p |
| Abstrakt: |
Au@Ag core--shell composites were successfully fabricated on urchinlike covalent organic frameworks (COFs), providing a platform with numerous hot spots for the detection of two categories of emerging contaminants: sulfonamide antibiotics and nanoplastics, using surfaceenhanced Raman spectroscopy (SERS). Au seeds (~10 nm) were generated on the COFs, leveraging the reducing properties of the vinyl and imino groups within the framework. This ensured the growth of dense and uniformly distributed Ag nanoparticles. The COFs exceptionally large surface area (2324 m² g-1) and high adsorption capacity, significantly contributed to the enrichment and detection of trace pollutants. As a result, using a portable Raman spectrometer, limits of detection of 0.008 lmol L-1 for sulfamethoxazole and 0.029mg L-1 for polystyrene nanoplastics were achieved. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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