Improved mercury ions (Hg2+) detection by composite silver nanoparticles (AgNPs) and nitrogen - Sulfur co-doped carbon dots (N, S-CDs)
Heteroatom doping has been demonstrated as an efficient method to increase the fluorescence quantum yield efficiency of carbon dots. Co-doping with heteroatoms leads to additional active sites on carbon dots, both extending their use in sensing systems and improving the sensitivity of detection. In...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Results in Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590048X24000256 |
| _version_ | 1797261820386344960 |
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| author | Sriati Wahyudi Japar Abdul Aziz Ferry Faizal Ayi Bahtiar |
| author_facet | Sriati Wahyudi Japar Abdul Aziz Ferry Faizal Ayi Bahtiar |
| author_sort | Sriati Wahyudi |
| collection | DOAJ |
| description | Heteroatom doping has been demonstrated as an efficient method to increase the fluorescence quantum yield efficiency of carbon dots. Co-doping with heteroatoms leads to additional active sites on carbon dots, both extending their use in sensing systems and improving the sensitivity of detection. In this study, the synthesis of nitrogen and sulfur co-doped carbon dots (N, S-CDs) through a single step hydrothermal process was reported, utilizing citric acid and thiourea as sources of carbon, nitrogen, respectively. This N, S-CDs was composited with silver nanoparticles (AgNPs) to detect mercury ions (Hg2+) with reabsorption principle. The fluorescence intensity of the carbon dots was vanished by AgNPs due to the reabsorption effect due to overlap between emission spectrum of N, S-CDs and absorption spectrum of AgNPs, and it is recovered by the addition of Hg2+ due to formation Ag/Hg amalgam. As a result, composite of N, S-CDs-AgNPs can be used as a fluorescence ''turn-on'' probe for rapid and highly sensitive detection of Hg2+. The lowest limit of detection (LOD) of Hg2+ is 10 nM with linear detection in the range of 1 nM - 1.0 μM. This LOD is improved three-order of magnitude as compared to the N, S-CDs only with detection limit in 10 μM. This result proves that the composite of N, S–CDs-AgNPs is a very sensitive fluorescence probe for mercury ions detection. This work will also provide ideas for creating and building novel fluorescence probes for similar applications. |
| first_indexed | 2024-04-24T23:47:17Z |
| format | Article |
| id | doaj.art-1000685d4d054242ae28dcdf9ae0878b |
| institution | Directory Open Access Journal |
| issn | 2590-048X |
| language | English |
| last_indexed | 2024-04-24T23:47:17Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Materials |
| spelling | doaj.art-1000685d4d054242ae28dcdf9ae0878b2024-03-15T04:44:35ZengElsevierResults in Materials2590-048X2024-03-0121100551Improved mercury ions (Hg2+) detection by composite silver nanoparticles (AgNPs) and nitrogen - Sulfur co-doped carbon dots (N, S-CDs)Sriati Wahyudi0Japar Abdul Aziz1Ferry Faizal2Ayi Bahtiar3Department of Biotechnology, Post Graduate School, Universitas Padjadjaran, Bandung 40132, Indonesia; Corresponding author.Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Sumedang 45363, IndonesiaDepartment of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Sumedang 45363, Indonesia; Functional Nano Powder University Center of Excellence (FiNder U-CoE), Universitas Padjadjaran, Sumedang 45363, IndonesiaDepartment of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Sumedang 45363, Indonesia; Functional Nano Powder University Center of Excellence (FiNder U-CoE), Universitas Padjadjaran, Sumedang 45363, Indonesia; Corresponding author. Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Sumedang 45363, Indonesia.Heteroatom doping has been demonstrated as an efficient method to increase the fluorescence quantum yield efficiency of carbon dots. Co-doping with heteroatoms leads to additional active sites on carbon dots, both extending their use in sensing systems and improving the sensitivity of detection. In this study, the synthesis of nitrogen and sulfur co-doped carbon dots (N, S-CDs) through a single step hydrothermal process was reported, utilizing citric acid and thiourea as sources of carbon, nitrogen, respectively. This N, S-CDs was composited with silver nanoparticles (AgNPs) to detect mercury ions (Hg2+) with reabsorption principle. The fluorescence intensity of the carbon dots was vanished by AgNPs due to the reabsorption effect due to overlap between emission spectrum of N, S-CDs and absorption spectrum of AgNPs, and it is recovered by the addition of Hg2+ due to formation Ag/Hg amalgam. As a result, composite of N, S-CDs-AgNPs can be used as a fluorescence ''turn-on'' probe for rapid and highly sensitive detection of Hg2+. The lowest limit of detection (LOD) of Hg2+ is 10 nM with linear detection in the range of 1 nM - 1.0 μM. This LOD is improved three-order of magnitude as compared to the N, S-CDs only with detection limit in 10 μM. This result proves that the composite of N, S–CDs-AgNPs is a very sensitive fluorescence probe for mercury ions detection. This work will also provide ideas for creating and building novel fluorescence probes for similar applications.http://www.sciencedirect.com/science/article/pii/S2590048X24000256Carbon dots (CDs)Heteroatom dopingSilver nanoparticles (AgNPs)Detection of mercury (Hg2+) |
| spellingShingle | Sriati Wahyudi Japar Abdul Aziz Ferry Faizal Ayi Bahtiar Improved mercury ions (Hg2+) detection by composite silver nanoparticles (AgNPs) and nitrogen - Sulfur co-doped carbon dots (N, S-CDs) Results in Materials Carbon dots (CDs) Heteroatom doping Silver nanoparticles (AgNPs) Detection of mercury (Hg2+) |
| title | Improved mercury ions (Hg2+) detection by composite silver nanoparticles (AgNPs) and nitrogen - Sulfur co-doped carbon dots (N, S-CDs) |
| title_full | Improved mercury ions (Hg2+) detection by composite silver nanoparticles (AgNPs) and nitrogen - Sulfur co-doped carbon dots (N, S-CDs) |
| title_fullStr | Improved mercury ions (Hg2+) detection by composite silver nanoparticles (AgNPs) and nitrogen - Sulfur co-doped carbon dots (N, S-CDs) |
| title_full_unstemmed | Improved mercury ions (Hg2+) detection by composite silver nanoparticles (AgNPs) and nitrogen - Sulfur co-doped carbon dots (N, S-CDs) |
| title_short | Improved mercury ions (Hg2+) detection by composite silver nanoparticles (AgNPs) and nitrogen - Sulfur co-doped carbon dots (N, S-CDs) |
| title_sort | improved mercury ions hg2 detection by composite silver nanoparticles agnps and nitrogen sulfur co doped carbon dots n s cds |
| topic | Carbon dots (CDs) Heteroatom doping Silver nanoparticles (AgNPs) Detection of mercury (Hg2+) |
| url | http://www.sciencedirect.com/science/article/pii/S2590048X24000256 |
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