Urchin-like covalent organic frameworks templated Au@Ag composites for SERS detection of emerging contaminants.
Chem Commun (Camb)
; 60(67): 8840-8843, 2024 Aug 15.
Article
em En
| MEDLINE
| ID: mdl-39005066
ABSTRACT
Au@Ag core-shell composites were successfully fabricated on urchin-like 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 surface-enhanced Raman spectroscopy (SERS). Au seeds (â¼10 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 µmol L-1 for sulfamethoxazole and 0.029 mg L-1 for polystyrene nanoplastics were achieved.
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MEDLINE
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En
Ano de publicação:
2024
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Article