期刊
ANALYTICAL METHODS
卷 14, 期 5, 页码 532-540出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ay02017j
关键词
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资金
- National Natural Science Foundation of China [22166005, 21906017, 21866003, 21866004]
- Jiangxi Provincial Natural Science Foundation [20202BABL213026, 20202BABL203016]
A ratiometric fluorescence system was developed for the detection of trace UO22+ in water using the inner filter effect between AuNPs and AuNCs. The fluorescent sensor exhibited a color change from red to blue when UO22+ was added, with a detection limit of 8.4 nM. It showed good performance for UO22+ determination in real-world water samples.
In this work, a ratiometric fluorescence system was designed for the detection of trace UO22+ in water based on the inner filter effect (IFE) between gold nanoparticles (AuNPs) and gold nanoclusters (AuNCs). IFE-induced fluorescence quenching was achieved due to the enhanced complementary overlap between the absorption spectra of AuNPs and the emission spectrum of AuNCs after the addition of UO22+. Blue carbon dots (B-CDs) were added to serve as reference fluorophores to expand the color tonality and make human eye recognition easier. The ratiometric fluorescent sensor demonstrated a unique fluorescence color change from red to blue when different doses of UO22+ were added, with a detection limit of 8.4 nM. Furthermore, the ratiometric fluorescent sensor was effectively used for UO22+ determination in real-world water samples, with acceptable recoveries.
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