Dual functional N- and S-co-doped carbon dots as the sensor for temperature and Fe3+ ions

Cui, Xiaobiao; Wang, Yinglin; Liu, Jie; Yang, Qiuyue; Zhang, Bo; Gao, Yuan; Wang, Yue; Lu, Geyu

doi:10.1016/j.snb.2016.09.032

Cited by 189 publications

(99 citation statements)

References 55 publications

(69 reference statements)

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“…The peaks at 399.8 and 400.8 eV in the N1s spectrum (Figure C) originated at the N–C 3 and N–H groups, respectively. Two O1s peaks at 531.6 and 533.3 eV in (Figure D) could be attributed to the C═O and C–OH/C–O–C groups . The XPS results were consistent with the corresponding FT‐IR spectrum analysis.…”

Section: Resultssupporting

confidence: 80%

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Crown daisy leaf waste–derived carbon dots: A simple and green fluorescent probe for copper ion

Wang

et al. 2019

Surface & Interface Analysis

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In this paper, N‐doped carbon quantum dots (N‐CDs) were fabricated using crown daisy leaves, a kitchen waste, as carbon source. The synthesized N‐CDs possessed abundant surface functional groups, such as hydroxyl, carboxyl, and amino groups, and had good dispersibility in water. Because of the special fluorescence quenching property toward Cu2+, the synthesized N‐CDs can be exploited as an effective label‐free fluorescent probe for Cu2+ determination. The possible fluorescence sensing mechanism considered the selective coordination interaction between Cu2+ ion and the hydroxyl, carboxyl, and amino groups of the N‐CDs. The control experiments also showed that the N‐doped aromatic C–N heterocycle structure played a crucial role in selective sensing of Cu2+. The decrease in fluorescence efficiencies was linearly related with the Cu2+ concentrations in the range of 10.0nM to 120.0nM, with a response limit of 1.0nM. The prepared probe was also applied for Cu2+ determination in real river water.

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Section: Resultssupporting

confidence: 80%

“…Two O1s peaks at 531.6 and 533.3 eV in ( Figure 3D) could be attributed to the C═O and C-OH/C-O-C groups. 38 The XPS results were consistent with the corresponding FT-IR spectrum analysis.…”

Section: Characterizationssupporting

confidence: 82%

Crown daisy leaf waste–derived carbon dots: A simple and green fluorescent probe for copper ion

Wang

et al. 2019

Surface & Interface Analysis

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“…But fluorescence intensity predominantly decreases in low and high pH. The reduction of the fluorescence intensity in very low and very high pH demonstrates that H + and OH − ions can effectively interfer with the recombination of the radiative exactions . In addition, the synthesized NPCDs have many negatively charged functional groups, which are neutralized by H + ions.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of nitrogen‐ and phosphorous‐doped carbon dots by the pyrolysis method for iodide and iron(III) sensing

et al. 2017

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A facile and novel strategy to synthesize nitrogen- and phosphorous-doped carbon dots (NPCDs) by single step pyrolysis method is described here. Citric acid is used as carbon source and di-ammonium hydrogen phosphate is used as both nitrogen and phosphorous sources, respectively. Through the extensive study on optical properties, morphology and chemical structures of the synthesized NPCDs, it is found that as-synthesized NPCDs exhibited good excitation-dependent luminescence property, spherical morphology and high stability. The obtained NPCDs are stable in aqueous medium and possess a quantum yield of 10.58%. In this work, a new assay method is developed to detect iodide ions using the synthesized NPCDs. Here, the inner filter effect is applied to detect the iodide ion and exhibited a wide linear response concentration range (10-60 μM) with a limit of detection (LOD) of 0.32 μM. Furthermore, the synthesized NPCDs are used for the selective detection of iron(III) (Fe ) ions and cell imaging. Fe ions sensing assay shows a detection range from 0.2 to 30 μM with a LOD of 72 nM. As an efficient photoluminescence sensor, the developed NPCDs have an excellent biocompatibility and low cytotoxicity, allowing Fe ion detection in HeLa cells.

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“…e 2 International Journal of Chemical Engineering carbonyl peak appears in the stretch (1710 cm −1 ), and the C�C peak appears in the stretch (1648 cm −1 ). Finally, two peaks at 1190 and 1036 cm −1 attributed to the stretch to C-O and C-O-C bonds, respectively [25]. e FT-IR spectrum of N-CNs shows distinctive absorption peaks of hydroxyl and amine appear stretch at 3257 cm −1 and peak at 2919 cm −1 assigned to C-H group.…”

Section: Ftir Analysismentioning

confidence: 94%

“…e FT-IR spectrum of N-CNs shows distinctive absorption peaks of hydroxyl and amine appear stretch at 3257 cm −1 and peak at 2919 cm −1 assigned to C-H group. e bands appearing at 1299, 1105, and 1027 cm −1 demonstrate carboxyl groups [25,26]. e FT-IR analysis of S-CNs exhibits the band on stretch at 1038 cm −1 is attributed to C-O, S-O, and C-O-C bonds, while the C-O and C-S bonds appear on stretch at 1194 cm −1 and COO − groups appear between 1396-1496 cm −1 .…”

Section: Ftir Analysismentioning

confidence: 96%

Green Synthesis of S- and N-Codoped Carbon Nanospheres and Application as Adsorbent of Pb (II) from Aqueous Solution

Hussain

Alwan

Alshamsi

et al. 2020

International Journal of Chemical Engineering

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In this paper, green and facile synthesis of sulfur-and nitrogen-codoped carbon nanospheres (CNs) was prepared from the extract of Hibiscus sabdariffa L by a direct hydrothermal method. Finally, sulfur-carbon nanospheres (CNs) were used as the adsorbent to remove Pb +2 ions from aqueous solutions because of the high surface area of S-CNs from CNs and N-CNs. e synthesized nanospheres were examined by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscopy, transmission electron microscopy (TEM), and nitrogen adsorption-desorption isotherms. e results show spherical shapes have a particle size of up to 65 nm with a high surface area capable of absorbing lead ions efficiently. Additionally, the factors affecting the process of adsorption that include equilibrium time, temperature, pH solution, ionic intensity, and adsorbent dose were studied. e equilibrium removal efficiency was studied employing Langmuir, Freundlich, and Temkin isotherm forms. e kinetic data were analyzed with two different kinetic models, and both apply to the adsorption process depending on the values of correlation coefficients. e thermodynamic parameters including Gibbs free energy (ΔG°), standard enthalpy change (ΔH°), and standard entropy change (ΔS°) were calculated for the adsorption process.

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Dual functional N- and S-co-doped carbon dots as the sensor for temperature and Fe3+ ions

Cited by 189 publications

References 55 publications

Crown daisy leaf waste–derived carbon dots: A simple and green fluorescent probe for copper ion

Crown daisy leaf waste–derived carbon dots: A simple and green fluorescent probe for copper ion

Fabrication of nitrogen‐ and phosphorous‐doped carbon dots by the pyrolysis method for iodide and iron(III) sensing

Green Synthesis of S- and N-Codoped Carbon Nanospheres and Application as Adsorbent of Pb (II) from Aqueous Solution

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