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Preparation of Highly Catalytic N-Doped Carbon Dots and Their Application in SERS Sulfate Sensing

Carbon dots (CD) have excellent stability and fluorescence activity, and have been widely used in fluorescence methods. However, there are no reports about using CD as catalysts to amplify SERS signals to detect trace sulfate. Thus, preparing CD catalysts and their application in SERS sulfate-sensin...

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Autores principales: Wang, Libing, Li, Chongning, Luo, Yanghe, Jiang, Zhiliang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6165424/
https://www.ncbi.nlm.nih.gov/pubmed/30205487
http://dx.doi.org/10.3390/ma11091655
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author Wang, Libing
Li, Chongning
Luo, Yanghe
Jiang, Zhiliang
author_facet Wang, Libing
Li, Chongning
Luo, Yanghe
Jiang, Zhiliang
author_sort Wang, Libing
collection PubMed
description Carbon dots (CD) have excellent stability and fluorescence activity, and have been widely used in fluorescence methods. However, there are no reports about using CD as catalysts to amplify SERS signals to detect trace sulfate. Thus, preparing CD catalysts and their application in SERS sulfate-sensing are significant. In this article, highly catalytic N-doped carbon dots (CD(N)) were prepared by a hydrothermal procedure. CD(N) exhibited strong catalysis of the gold nanoparticle (AuNP) reaction between HAuCl(4) and H(2)O(2). Vitoria blue 4R (VB4R) has a strong SERS peak at 1614 cm(−1) in the formed AuNP sol substrate. When Ba(2+) ions were added, they were adsorbed on a CD(N) surface to inhibit the CD(N) catalytic activity that caused the SERS peak decreasing. Upon addition of analyte SO(4)(2−), a reaction with Ba(2+) produced stable BaSO(4) precipitate and CD(N), and its catalysis recovered to cause SERS intensity increasing linearly. Thus, an SERS method was developed for the detection of 0.02–1.7 μmol/L SO(4)(2−), with a detection limit of 0.007 μmol/L.
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spelling pubmed-61654242018-10-12 Preparation of Highly Catalytic N-Doped Carbon Dots and Their Application in SERS Sulfate Sensing Wang, Libing Li, Chongning Luo, Yanghe Jiang, Zhiliang Materials (Basel) Article Carbon dots (CD) have excellent stability and fluorescence activity, and have been widely used in fluorescence methods. However, there are no reports about using CD as catalysts to amplify SERS signals to detect trace sulfate. Thus, preparing CD catalysts and their application in SERS sulfate-sensing are significant. In this article, highly catalytic N-doped carbon dots (CD(N)) were prepared by a hydrothermal procedure. CD(N) exhibited strong catalysis of the gold nanoparticle (AuNP) reaction between HAuCl(4) and H(2)O(2). Vitoria blue 4R (VB4R) has a strong SERS peak at 1614 cm(−1) in the formed AuNP sol substrate. When Ba(2+) ions were added, they were adsorbed on a CD(N) surface to inhibit the CD(N) catalytic activity that caused the SERS peak decreasing. Upon addition of analyte SO(4)(2−), a reaction with Ba(2+) produced stable BaSO(4) precipitate and CD(N), and its catalysis recovered to cause SERS intensity increasing linearly. Thus, an SERS method was developed for the detection of 0.02–1.7 μmol/L SO(4)(2−), with a detection limit of 0.007 μmol/L. MDPI 2018-09-07 /pmc/articles/PMC6165424/ /pubmed/30205487 http://dx.doi.org/10.3390/ma11091655 Text en © 2018 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
Wang, Libing
Li, Chongning
Luo, Yanghe
Jiang, Zhiliang
Preparation of Highly Catalytic N-Doped Carbon Dots and Their Application in SERS Sulfate Sensing
title Preparation of Highly Catalytic N-Doped Carbon Dots and Their Application in SERS Sulfate Sensing
title_full Preparation of Highly Catalytic N-Doped Carbon Dots and Their Application in SERS Sulfate Sensing
title_fullStr Preparation of Highly Catalytic N-Doped Carbon Dots and Their Application in SERS Sulfate Sensing
title_full_unstemmed Preparation of Highly Catalytic N-Doped Carbon Dots and Their Application in SERS Sulfate Sensing
title_short Preparation of Highly Catalytic N-Doped Carbon Dots and Their Application in SERS Sulfate Sensing
title_sort preparation of highly catalytic n-doped carbon dots and their application in sers sulfate sensing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6165424/
https://www.ncbi.nlm.nih.gov/pubmed/30205487
http://dx.doi.org/10.3390/ma11091655
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