抗坏血酸
荧光
碳纤维
光化学
猝灭(荧光)
量子产额
光子上转换
材料科学
无机化学
检出限
分析化学(期刊)
化学
表面改性
兴奋剂
光电子学
有机化学
物理化学
物理
复合数
量子力学
复合材料
色谱法
食品科学
作者
Yan Zhao,Xiaoxuan Zhu,Lu Liu,Zhiqing Duan,Yanping Liu,Weiyuan Zhang,Jingjing Cui,Yafang Rong,Chen Dong
出处
期刊:Nanomaterials
[MDPI AG]
日期:2022-07-12
卷期号:12 (14): 2377-2377
被引量:15
摘要
Carbon dots (CDs) have caught enormous attention owing to their distinctive properties, such as their high water solubility, tunable optical properties, and easy surface modification, which can be generally used for the detection of heavy metals and organic pollutants. Herein, nitrogen and fluorine co-doped carbon dots (NFCDs) were designed via a rapid, low-cost, and one-step microwave-assisted technique using DL-malic acid and levofloxacin. The NFCDs emitted intense green fluorescence under UV lighting, and the optical emission peak at 490 nm was observed upon a 280 nm excitation, with a high quantum yield of 21.03%. Interestingly, the spectral measurements illustrated excitation-independent and concentration-independent single-color fluorescence owing to the presence of nitrogen and fluorine elements in the surface functional groups. Additionally, the NFCDs were applied for the selective detection of Fe3+ and ascorbic acid based on the "turn-off" mode. The detection limits were determined as 1.03 and 4.22 µM, respectively. The quenching mechanisms were explored using the static quenching mechanism and the inner filter effect. Therefore, a NFCDs fluorescent probe with single color emission was successfully developed for the convenient and rapid detection of Fe3+ and ascorbic acid in environments.
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