荧光
纳米团簇
铀酰
化学
吸收(声学)
胶体金
检出限
光化学
离子
猝灭(荧光)
分析化学(期刊)
纳米颗粒
材料科学
色谱法
纳米技术
光学
物理
复合材料
有机化学
作者
Hua-Rui Nan,Yunhai Liu,Wen-Juan Gong,Hongbo Peng,Youqun Wang,Zhibin Zhang,Xiaohong Cao
出处
期刊:Analytical Methods
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:14 (5): 532-540
被引量:13
摘要
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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