期刊
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
卷 39, 期 2, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppsc.202100207
关键词
carbon dots; fluorescence sensors; functionalized; perylenetetracarboxylic dianhydride; sunset yellow
资金
- National Natural Science Foundation of China [51678409, 51638011, 51578375]
- Tianjin Research Program of Application Foundation and Advanced Technology of China [19JCYBJC19800, 18JCYBJC87500, 18JCYBJC89100, 15ZCZDSF00880]
- State Key Laboratory of Separation Membranes and Membrane Processes [Z1-201507]
- Program for Innovative Research Team in University of Tianjin [TD13-5042]
Sunset yellow is a commonly used food additive that can brighten foods, but excessive use may have health implications. The fluorescence sensor CDs-PTD, synthesized by functionalizing carbon dots, exhibits excellent selectivity and sensitivity towards FCF, making it suitable for detecting FCF in beverage samples.
Sunset yellow (FCF), a commonly used food additive, can brighten foods, but the improper amount of addition can also cause various diseases. Herein, the fluorescence sensor CDs-PTD for detecting FCF is synthesized by functionalizing carbon dots (CDs) with 3,4,9,10-pertetracarboxylic dianhydride (PTD). The prepared CDs-PTD shows excitation-independent fluorescence behavior with maximum fluorescence emission at 553 nm under 490 nm excitation and high quantum yields (21.4%). With the presence of FCF, the fluorescence of the sensor is quenched due to fluorescence resonance energy transfer (FRET). The CDs-PTD exhibits excellent selectivity and sensitivity toward FCF in the range of 0-180 x 10(-6) m with a low detection limit of 106.8 x 10(-9) m. In addition, the sensor is applied to the detection of FCF in beverage samples with recoveries ranging from 97% to 106%. And a portable CDs-PTD/agarose gel reagent strip is prepared for the assessment of FCF content within 15 min. The CDs-PTD can be an ideal sensor for detecting FCF in food, and provides a new idea for the detection of food additives.
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