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One-Pot Hydrothermal Synthesis of Carbon Dots as Fluorescent Probes for the Determination of Mercuric and Hypochlorite Ions

Nitrogen and sulfur codoped carbon dots (NSCDs) were synthesized via a one-pot hydrothermal method, and citric acid, ethylenediamine, and methyl blue were used as precursors. The obtained NSCDs were spherical with an average size of 1.86 nm. The fluorescence emission spectra of the NSCDs were excita...

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Autores principales: Lee, Hsin, Su, Yen-Chang, Tang, Hsiang-Hao, Lee, Yu-Sheng, Lee, Jan-Yee, Hu, Cho-Chun, Chiu, Tai-Chia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8308378/
https://www.ncbi.nlm.nih.gov/pubmed/34361216
http://dx.doi.org/10.3390/nano11071831
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author Lee, Hsin
Su, Yen-Chang
Tang, Hsiang-Hao
Lee, Yu-Sheng
Lee, Jan-Yee
Hu, Cho-Chun
Chiu, Tai-Chia
author_facet Lee, Hsin
Su, Yen-Chang
Tang, Hsiang-Hao
Lee, Yu-Sheng
Lee, Jan-Yee
Hu, Cho-Chun
Chiu, Tai-Chia
author_sort Lee, Hsin
collection PubMed
description Nitrogen and sulfur codoped carbon dots (NSCDs) were synthesized via a one-pot hydrothermal method, and citric acid, ethylenediamine, and methyl blue were used as precursors. The obtained NSCDs were spherical with an average size of 1.86 nm. The fluorescence emission spectra of the NSCDs were excitation independent and emitted blue fluorescence at 440 nm with an excitation wavelength at 350 nm. The quantum yield of the NSCDs was calculated to be 68.0%. The NSCDs could be constructed as fluorescent probes for highly selective and sensitive sensing mercuric (Hg(2+)) and hypochlorite (ClO(−)) ions. As the addition of Hg(2+) or ClO(−) ions to the NSCDs, the fluorescence intensity was effectively quenched due to dynamic quenching. Under the optimal conditions, the linear response of the fluorescence intensity ranged from 0.7 μM to 15 μM with a detection limit of 0.54 μM and from 0.3 μM to 5.0 μM with a limit of detection of 0.29 μM for Hg(2+) and ClO(−) ions, respectively. Finally, the proposed method was successfully used for quantifying Hg(2+) and ClO(−) ions in spiked tap water samples.
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spelling pubmed-83083782021-07-25 One-Pot Hydrothermal Synthesis of Carbon Dots as Fluorescent Probes for the Determination of Mercuric and Hypochlorite Ions Lee, Hsin Su, Yen-Chang Tang, Hsiang-Hao Lee, Yu-Sheng Lee, Jan-Yee Hu, Cho-Chun Chiu, Tai-Chia Nanomaterials (Basel) Article Nitrogen and sulfur codoped carbon dots (NSCDs) were synthesized via a one-pot hydrothermal method, and citric acid, ethylenediamine, and methyl blue were used as precursors. The obtained NSCDs were spherical with an average size of 1.86 nm. The fluorescence emission spectra of the NSCDs were excitation independent and emitted blue fluorescence at 440 nm with an excitation wavelength at 350 nm. The quantum yield of the NSCDs was calculated to be 68.0%. The NSCDs could be constructed as fluorescent probes for highly selective and sensitive sensing mercuric (Hg(2+)) and hypochlorite (ClO(−)) ions. As the addition of Hg(2+) or ClO(−) ions to the NSCDs, the fluorescence intensity was effectively quenched due to dynamic quenching. Under the optimal conditions, the linear response of the fluorescence intensity ranged from 0.7 μM to 15 μM with a detection limit of 0.54 μM and from 0.3 μM to 5.0 μM with a limit of detection of 0.29 μM for Hg(2+) and ClO(−) ions, respectively. Finally, the proposed method was successfully used for quantifying Hg(2+) and ClO(−) ions in spiked tap water samples. MDPI 2021-07-14 /pmc/articles/PMC8308378/ /pubmed/34361216 http://dx.doi.org/10.3390/nano11071831 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lee, Hsin
Su, Yen-Chang
Tang, Hsiang-Hao
Lee, Yu-Sheng
Lee, Jan-Yee
Hu, Cho-Chun
Chiu, Tai-Chia
One-Pot Hydrothermal Synthesis of Carbon Dots as Fluorescent Probes for the Determination of Mercuric and Hypochlorite Ions
title One-Pot Hydrothermal Synthesis of Carbon Dots as Fluorescent Probes for the Determination of Mercuric and Hypochlorite Ions
title_full One-Pot Hydrothermal Synthesis of Carbon Dots as Fluorescent Probes for the Determination of Mercuric and Hypochlorite Ions
title_fullStr One-Pot Hydrothermal Synthesis of Carbon Dots as Fluorescent Probes for the Determination of Mercuric and Hypochlorite Ions
title_full_unstemmed One-Pot Hydrothermal Synthesis of Carbon Dots as Fluorescent Probes for the Determination of Mercuric and Hypochlorite Ions
title_short One-Pot Hydrothermal Synthesis of Carbon Dots as Fluorescent Probes for the Determination of Mercuric and Hypochlorite Ions
title_sort one-pot hydrothermal synthesis of carbon dots as fluorescent probes for the determination of mercuric and hypochlorite ions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8308378/
https://www.ncbi.nlm.nih.gov/pubmed/34361216
http://dx.doi.org/10.3390/nano11071831
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