Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 212, Issue -, Pages 300-307Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2019.01.010
Keywords
g-C3N4 nanofibers; Fluorescent probe; Quenching; Dopamine
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Funding
- National Natural Science Foundation of China [51572127, 21576138, 51872140]
- China-Israel Cooperative Program [2016YFE0129900]
- Program Foundation of Ministry of Education of China [20133219110018]
- Six Major Talent Summit [XNY-011]
- Natural Science Foundation of Jiangsu Province [BK20160828]
- China Postdoctoral Science Foundation [1501016B]
- PAPD of Jiangsu Province
- Program for Science and Technology Innovative Research Team in Universities of Jiangsu Province, China
- [NCET-12-0629]
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A novel fluorescent sensor based on g-C3N4 nanofibers for the sensitive detection of dopamine (DA) has been proposed. We synthesized g-C3N4 nanofibers by directly hydrolyzing bulk g-C3N4 in the alkaline atmosphere (3 M NaOH). The obtained ultrathin g-C3N4 nanofibers were verified by characterizations of Transmission electronic microscope (TEM), X-ray diffractometer (XRD), Fourier transformation-infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS). It was found that the fluorescence intensity of g-C3N4 nanofibers was obviously quenched by DA. Fluorescence resonance energy transfer (FRET) between DA and g-C3N4 nanofibers led to the fluorescence reduction of g-C3N4 nanofibers. The fluorescent probe based on g-C3N4 nanofibers exhibits linear responses to the concentration of DA in the range from 0 to 4 mu M and 4 to 20 mu M, the limit of detection is 17 nM. The fluorescent probe shows excellent stability, good selectivity with its application in serums. (C) 2019 Elsevier B.V. All rights reserved.
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