The influence of thermal treatment conditions (solvothermal microwave) and solvent polarity on the morphology and emission of phloroglucinol-based nitrogen-doped carbon dots

The optical properties of chemically synthesized carbon dots (CDs) can be widely tuned via doping and surface modification with heteroatoms such as nitrogen, which results in a range of potential applications. Herein, two most commonly used synthesis approaches, namely, solvothermal and microwave-as...

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Bibliographic Details
Published in:Nanoscale 2021-02, Vol.13 (5), p.37-378
Main Authors: Khavlyuk, Pavel D, Stepanidenko, Evgeniia A, Bondarenko, Daniil P, Danilov, Denis V, Koroleva, Aleksandra V, Baranov, Alexander V, Maslov, Vladimir G, Kasak, Peter, Fedorov, Anatoly V, Ushakova, Elena V, Rogach, Andrey L
Format: Article
Language:English
Subjects:
Carbon dots
Dimethylformamide
Doping
Ethylenediamine
Heat treatment
Morphology
Nitrogen
Optical properties
Phloroglucinol
Solvents
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Summary:The optical properties of chemically synthesized carbon dots (CDs) can be widely tuned via doping and surface modification with heteroatoms such as nitrogen, which results in a range of potential applications. Herein, two most commonly used synthesis approaches, namely, solvothermal and microwave-assisted thermal treatments, have been used for the preparation of CDs from phloroglucinol using three different nitrogen containing solvents, namely, ethylenediamine, dimethylformamide, and formamide. Based on the analysis of the morphology and optical properties, we demonstrate the tenability of the CD appearance from amorphous or well-carbonized spherical particles to onion-like ones, which is controlled by solvent polarity, whereas the thermal treatment conditions mostly influence the degree of N-doping and the nature of emissive centers of CDs formed. The findings of this study expand the toolkit of the available CDs with variable morphology and energy structure. The morphology of chemically synthesized carbon dots can be tuned from amorphous to onion-like particles via solvent polarity whereas the thermal treatment conditions influence the degree of nitrogen doping and their optical properties.
ISSN:2040-3364
2040-3372
DOI:10.1039/d0nr07852b