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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 (...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
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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. |
format | Online Article Text |
id | pubmed-9378613 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
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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