Tuning the Photoluminescence of Graphene Quantum Dots by Photochemical Doping with Nitrogen

Nitrogen-doped graphene quantum dots (NGQDs) were synthesized by irradiating graphene quantum dots (GQDs) in an NH(3) atmosphere. The photoluminescence (PL) properties of the GQDs and the NGQDs samples were investigated. Compared with GQDs, a clear PL blue-shift of NGQDs could be achieved by regulat...

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Autores principales: Xu, Xiaofen, Gao, Fuhua, Bai, Xiaohua, Liu, Fuchi, Kong, Wenjie, Li, Ming
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5706275/
https://www.ncbi.nlm.nih.gov/pubmed/29156648
http://dx.doi.org/10.3390/ma10111328
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author Xu, Xiaofen
Gao, Fuhua
Bai, Xiaohua
Liu, Fuchi
Kong, Wenjie
Li, Ming
author_facet Xu, Xiaofen
Gao, Fuhua
Bai, Xiaohua
Liu, Fuchi
Kong, Wenjie
Li, Ming
author_sort Xu, Xiaofen
collection PubMed
description Nitrogen-doped graphene quantum dots (NGQDs) were synthesized by irradiating graphene quantum dots (GQDs) in an NH(3) atmosphere. The photoluminescence (PL) properties of the GQDs and the NGQDs samples were investigated. Compared with GQDs, a clear PL blue-shift of NGQDs could be achieved by regulating the irradiating time. The NGQDs obtained by irradiation of GQDs for 70 min had a high N content of 15.34 at % and a PL blue-shift of about 47 nm. This may be due to the fact that photochemical doping of GQDs with nitrogen can significantly enhance the contents of pyridine-like nitrogen, and also effectively decrease the contents of oxygen functional groups of NGQDs, thus leading to the observed obvious PL blue-shift.
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spelling pubmed-57062752017-12-04 Tuning the Photoluminescence of Graphene Quantum Dots by Photochemical Doping with Nitrogen Xu, Xiaofen Gao, Fuhua Bai, Xiaohua Liu, Fuchi Kong, Wenjie Li, Ming Materials (Basel) Article Nitrogen-doped graphene quantum dots (NGQDs) were synthesized by irradiating graphene quantum dots (GQDs) in an NH(3) atmosphere. The photoluminescence (PL) properties of the GQDs and the NGQDs samples were investigated. Compared with GQDs, a clear PL blue-shift of NGQDs could be achieved by regulating the irradiating time. The NGQDs obtained by irradiation of GQDs for 70 min had a high N content of 15.34 at % and a PL blue-shift of about 47 nm. This may be due to the fact that photochemical doping of GQDs with nitrogen can significantly enhance the contents of pyridine-like nitrogen, and also effectively decrease the contents of oxygen functional groups of NGQDs, thus leading to the observed obvious PL blue-shift. MDPI 2017-11-20 /pmc/articles/PMC5706275/ /pubmed/29156648 http://dx.doi.org/10.3390/ma10111328 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xu, Xiaofen
Gao, Fuhua
Bai, Xiaohua
Liu, Fuchi
Kong, Wenjie
Li, Ming
Tuning the Photoluminescence of Graphene Quantum Dots by Photochemical Doping with Nitrogen
title Tuning the Photoluminescence of Graphene Quantum Dots by Photochemical Doping with Nitrogen
title_full Tuning the Photoluminescence of Graphene Quantum Dots by Photochemical Doping with Nitrogen
title_fullStr Tuning the Photoluminescence of Graphene Quantum Dots by Photochemical Doping with Nitrogen
title_full_unstemmed Tuning the Photoluminescence of Graphene Quantum Dots by Photochemical Doping with Nitrogen
title_short Tuning the Photoluminescence of Graphene Quantum Dots by Photochemical Doping with Nitrogen
title_sort tuning the photoluminescence of graphene quantum dots by photochemical doping with nitrogen
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5706275/
https://www.ncbi.nlm.nih.gov/pubmed/29156648
http://dx.doi.org/10.3390/ma10111328
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