Highly fluorescent nitrogen-doped carbon dots for selective and sensitive detection of Hg2+ and ClO− ions and fluorescent ink

Li, Yuxuan; Lee, Jan-Yee; Lee, Hsin; Hu, Cho-Chun; Chiu, Tai-Chia

doi:10.1016/j.jphotochem.2020.112931

Cited by 28 publications

(7 citation statements)

References 43 publications

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“…However, these materials are restricted from use by their toxicity, low sensitivity, and high cost. Therefore, CDs could be an excellent candidate for the determination of Hg 2 + or ClO − ions [ 19 , 20 , 21 , 22 , 23 , 24 ]. For example, fluorescent CDs were synthesized from ascorbic acid and urea and used for the selective determination of Hg 2+ and Cu 2+ ions and bioimaging [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

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

Lee

Tang

et al. 2021

Nanomaterials

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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 (Hg2+) and hypochlorite (ClO−) ions. As the addition of Hg2+ 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 Hg2+ and ClO− ions, respectively. Finally, the proposed method was successfully used for quantifying Hg2+ and ClO− ions in spiked tap water samples.

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Section: Introductionmentioning

confidence: 99%

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

Lee

Tang

et al. 2021

Nanomaterials

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“…The LODs for Pb 2+ and Hg 2+ are 14.32 nM and 56.81 nM, respectively. In addition, the LODs of the proposed technique have lower values as compared to that of other reported methods for the detection of Pb 2+ and Hg 2+ ions [25][26][27][28][44][45][46][47][48][49][50][51][52][53][54] (Table I).…”

Section: Sensitivity Studymentioning

confidence: 84%

Microwave-Assisted Synthesis of Red Emitting Copper Nanoclusters Using Trypsin as a Ligand for Sensing of Pb²⁺ And Hg²⁺ Ions in Water and Tobacco Samples

et al. 2022

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In this work, a microwave assisted method was developed for synthesis of red fluorescent copper nanoclusters (NCs) using trypsin as a template (trypsin–Cu). The as-synthesized trypsin–Cu NCs are stable and water soluble, exhibiting fluorescence emission at 657 nm when excited at 490 nm. The as-prepared red-emitting trypsin–Cu NCs were characterized by using several analytical techniques such as ultraviolet–visible (UV–Vis) and fluorescence, fluorescence lifetime, Fourier transform infrared, and X-ray photoelectron spectroscopic techniques. Red-emitting trypsin–Cu NCs acted as a nanosensor for sensing both Pb2+ and Hg2+ ions through fluorescence quenching. Using this approach, good linearities are observed in the range of 0.1–25 and of 0.001–1 μM with the lower limit of detection of 14.63 and 56.81 nM for Pb2+ and Hg2+ ions, respectively. Trypsin–Cu NCs-based fluorescence assay was successfully applied to detect both Hg2+ and Pb2+ ions in water and tobacco samples.

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“…CDs have been used in different application areas from bioimaging to sensing mainly because of their superior fluorescent properties. CDs are also utilized as fluorescent ink to identify to counterfeit printings, information storage and encryption [65]. In this study, fluorescent ink was prepared by using 15 mL synthesized CDs and 0.5 g polyvinyl alcohol (PVA).…”

Section: Resultsmentioning

confidence: 99%

“…They were mixed by the help of magnetic stirrer for 1 hour. The obtained fluorescent ink was poured into empty fountain pen [65]. As showed in Figure 8(a), there were no significant patterns seen on the filter paper but blue fluorescent pattern was apparent under 365 nm light in Figure 8(b).…”

Section: Resultsmentioning

confidence: 99%

One-Pot Synthesis of Carbon Quantum Dots and Their Application as a Fluorescent Inks

Eskalen

Kavgacı

Kayış

et al. 2021

Eskişehir Technical University Journal of Science and Technology a - Applied Sciences and Engineering

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A facile, low cost, and one-pot hydrothermal reaction method is utilized to synthesized highly stable and durable carbon quantum dots (CQDs) by using laurus nobilis leaves as a carbon source. Laurus nobilis leaves were subjected to hydrothermal reaction at 175 °C for 10 h. The color of obtained CQDs under UV-light is bright blue fluorescence. The excitation dependent fluorescent emission of the prepared CQDs was observed and the obtained CQDs gives maximum emission at 425 nm when excited at 344 nm. The absorption peak of the CQDs is located at 279 nm. Furthermore, the synthesized CQDs can be consumed as a fluorescent ink for security, encryption and information storage applications. Combining with good stability and water solubility, unique fluorescence properties and its low-cost, CQDs can also be used as a next generation fluorescent ink alternative to traditional fluorescent ink for anti-counterfeiting.

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Highly fluorescent nitrogen-doped carbon dots for selective and sensitive detection of Hg2+ and ClO− ions and fluorescent ink

Cited by 28 publications

References 43 publications

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

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

Microwave-Assisted Synthesis of Red Emitting Copper Nanoclusters Using Trypsin as a Ligand for Sensing of Pb²⁺ And Hg²⁺ Ions in Water and Tobacco Samples

One-Pot Synthesis of Carbon Quantum Dots and Their Application as a Fluorescent Inks

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Highly fluorescent nitrogen-doped carbon dots for selective and sensitive detection of Hg2+ and ClO− ions and fluorescent ink

Cited by 28 publications

References 43 publications

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

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

Microwave-Assisted Synthesis of Red Emitting Copper Nanoclusters Using Trypsin as a Ligand for Sensing of Pb2+ And Hg2+ Ions in Water and Tobacco Samples

One-Pot Synthesis of Carbon Quantum Dots and Their Application as a Fluorescent Inks

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Microwave-Assisted Synthesis of Red Emitting Copper Nanoclusters Using Trypsin as a Ligand for Sensing of Pb²⁺ And Hg²⁺ Ions in Water and Tobacco Samples