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Investigating the effect of N-doping on carbon quantum dots structure, optical properties and metal ion screening

Carbon quantum dots (CQDs) derived from biomass, a suggested green approach for nanomaterial synthesis, often possess poor optical properties and have low photoluminescence quantum yield (PLQY). This study employed an environmentally friendly, cost-effective, continuous hydrothermal flow synthesis (...

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Autores principales: Nguyen, Kiem Giap, Baragau, Ioan-Alexandru, Gromicova, Radka, Nicolaev, Adela, Thomson, Stuart A. J., Rennie, Alistair, Power, Nicholas P., Sajjad, Muhammad Tariq, Kellici, Suela
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9378613/
https://www.ncbi.nlm.nih.gov/pubmed/35970901
http://dx.doi.org/10.1038/s41598-022-16893-x
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author Nguyen, Kiem Giap
Baragau, Ioan-Alexandru
Gromicova, Radka
Nicolaev, Adela
Thomson, Stuart A. J.
Rennie, Alistair
Power, Nicholas P.
Sajjad, Muhammad Tariq
Kellici, Suela
author_facet Nguyen, Kiem Giap
Baragau, Ioan-Alexandru
Gromicova, Radka
Nicolaev, Adela
Thomson, Stuart A. J.
Rennie, Alistair
Power, Nicholas P.
Sajjad, Muhammad Tariq
Kellici, Suela
author_sort Nguyen, Kiem Giap
collection PubMed
description Carbon quantum dots (CQDs) derived from biomass, a suggested green approach for nanomaterial synthesis, often possess poor optical properties and have low photoluminescence quantum yield (PLQY). This study employed an environmentally friendly, cost-effective, continuous hydrothermal flow synthesis (CHFS) process to synthesise efficient nitrogen-doped carbon quantum dots (N-CQDs) from biomass precursors (glucose in the presence of ammonia). The concentrations of ammonia, as nitrogen dopant precursor, were varied to optimise the optical properties of CQDs. Optimised N-CQDs showed significant enhancement in fluorescence emission properties with a PLQY of 9.6% compared to pure glucose derived-CQDs (g-CQDs) without nitrogen doping which have PLQY of less than 1%. With stability over a pH range of pH 2 to pH 11, the N-CQDs showed excellent sensitivity as a nano-sensor for the highly toxic highly-pollutant chromium (VI), where efficient photoluminescence (PL) quenching was observed. The optimised nitrogen-doping process demonstrated effective and efficient tuning of the overall electronic structure of the N-CQDs resulting in enhanced optical properties and performance as a nano-sensor.
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spelling pubmed-93786132022-08-17 Investigating the effect of N-doping on carbon quantum dots structure, optical properties and metal ion screening Nguyen, Kiem Giap Baragau, Ioan-Alexandru Gromicova, Radka Nicolaev, Adela Thomson, Stuart A. J. Rennie, Alistair Power, Nicholas P. Sajjad, Muhammad Tariq Kellici, Suela Sci Rep Article Carbon quantum dots (CQDs) derived from biomass, a suggested green approach for nanomaterial synthesis, often possess poor optical properties and have low photoluminescence quantum yield (PLQY). This study employed an environmentally friendly, cost-effective, continuous hydrothermal flow synthesis (CHFS) process to synthesise efficient nitrogen-doped carbon quantum dots (N-CQDs) from biomass precursors (glucose in the presence of ammonia). The concentrations of ammonia, as nitrogen dopant precursor, were varied to optimise the optical properties of CQDs. Optimised N-CQDs showed significant enhancement in fluorescence emission properties with a PLQY of 9.6% compared to pure glucose derived-CQDs (g-CQDs) without nitrogen doping which have PLQY of less than 1%. With stability over a pH range of pH 2 to pH 11, the N-CQDs showed excellent sensitivity as a nano-sensor for the highly toxic highly-pollutant chromium (VI), where efficient photoluminescence (PL) quenching was observed. The optimised nitrogen-doping process demonstrated effective and efficient tuning of the overall electronic structure of the N-CQDs resulting in enhanced optical properties and performance as a nano-sensor. Nature Publishing Group UK 2022-08-15 /pmc/articles/PMC9378613/ /pubmed/35970901 http://dx.doi.org/10.1038/s41598-022-16893-x Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Nguyen, Kiem Giap
Baragau, Ioan-Alexandru
Gromicova, Radka
Nicolaev, Adela
Thomson, Stuart A. J.
Rennie, Alistair
Power, Nicholas P.
Sajjad, Muhammad Tariq
Kellici, Suela
Investigating the effect of N-doping on carbon quantum dots structure, optical properties and metal ion screening
title Investigating the effect of N-doping on carbon quantum dots structure, optical properties and metal ion screening
title_full Investigating the effect of N-doping on carbon quantum dots structure, optical properties and metal ion screening
title_fullStr Investigating the effect of N-doping on carbon quantum dots structure, optical properties and metal ion screening
title_full_unstemmed Investigating the effect of N-doping on carbon quantum dots structure, optical properties and metal ion screening
title_short Investigating the effect of N-doping on carbon quantum dots structure, optical properties and metal ion screening
title_sort investigating the effect of n-doping on carbon quantum dots structure, optical properties and metal ion screening
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9378613/
https://www.ncbi.nlm.nih.gov/pubmed/35970901
http://dx.doi.org/10.1038/s41598-022-16893-x
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