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Published in: Journal of Nanoparticle Research 4/2019

01-04-2019 | Research Paper

Rapid preparation of homogeneous carbon dots with yellow fluorescence and formation mechanistic investigation

Authors: Jianfei Wei, Jianwei Gao, Yao Liu, Guo Zheng, Rui Wang

Published in: Journal of Nanoparticle Research | Issue 4/2019

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Abstract

In this study, homogeneous carbon dots with yellow fluorescence and high absolute fluorescence quantum yields (78.6%) were firstly prepared through a one-step solvothermal method without complicated process of separation, in which sodium citrate, carbamide, and anhydrous calcium chloride were adopted as precursors, while toluene was selected as solvent. The as-prepared carbon dots with an average size of 5.9 nm have a high degree of crystallinity. According to the discussion of the formation mechanism carbon dots, it is found that the toluene guarantee the formation of crystalline core and Ca2+ promotes the formation of carbonaceous core with high crystallinity, which is responsible for the ultrahigh quantum yield. Furthermore, the fluorescent properties of carbon dots are excellent in organic solvents and could be quenched by water, making them a promising material used without any modification in the detection of water in organic solvents, which has a great influence on organic chemical reaction, and may even determine the resultant, yield, and selectivity of organic reaction.

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Appendix
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Metadata
Title
Rapid preparation of homogeneous carbon dots with yellow fluorescence and formation mechanistic investigation
Authors
Jianfei Wei
Jianwei Gao
Yao Liu
Guo Zheng
Rui Wang
Publication date
01-04-2019
Publisher
Springer Netherlands
Published in
Journal of Nanoparticle Research / Issue 4/2019
Print ISSN: 1388-0764
Electronic ISSN: 1572-896X
DOI
https://doi.org/10.1007/s11051-019-4510-9

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