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One-Pot Hydrothermal Synthesis of Carbon Quantum Dots with Excellent Photoluminescent Properties and Catalytic Activity from Coke Powders
One-Pot Hydrothermal Synthesis of Carbon Quantum Dots with Excellent Photoluminescent Properties and Catalytic Activity from Coke Powders
- Source :
- Journal of Fluorescence. 30:151-156
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- Water-soluble, high quantum yield, green color carbon quantum dots (CQDs) are prepared by acid reflux with the use of coke powders as a carbon source. The CQDs are characterized by UV–Vis absorption spectroscopy, fluorescence spectroscopy, transmission electron microscope, fourier transform infrared spectrophotometer and x-ray diffraction. The analysis includes the evaluation of key variables with effect in the synthetic process of the quantum yield (QY) of CQDs: the reaction temperature and time, the volume of mixed acid (concentrated H2SO4 and HNO3) and the pH value on the structure and properties of as-prepared CQDs. The results revealed that the optimal hydrothermal synthesis conditions for obtaining CQDs are reaction at 100 °C for 8 h, with the volume of mixed acid is 16 mL, at pH value 9. The prepared CQDs have the activity of peroxidase-like and that quantum yield(QY)reached 34.27%.
- Subjects :
- Photoluminescence
Sociology and Political Science
Absorption spectroscopy
010405 organic chemistry
Chemistry
Clinical Biochemistry
Quantum yield
Infrared spectroscopy
Coke
010402 general chemistry
01 natural sciences
Biochemistry
Fluorescence spectroscopy
0104 chemical sciences
Catalysis
Clinical Psychology
Chemical engineering
Hydrothermal synthesis
Law
Spectroscopy
Social Sciences (miscellaneous)
Subjects
Details
- ISSN :
- 15734994 and 10530509
- Volume :
- 30
- Database :
- OpenAIRE
- Journal :
- Journal of Fluorescence
- Accession number :
- edsair.doi.dedup.....ed7fce73b29c12516334be9dabfb652b
- Full Text :
- https://doi.org/10.1007/s10895-019-02480-3