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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

Authors :
Zeze Peng
Shiqian Li
Sobhan Chatterjee
Huan He
Ling Ding
Jin Zhou
Kuntao Huang
Feng Liang
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%.

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