Carbon dots derived from flax straw for highly sensitive and selective detections of cobalt, chromium, and ascorbic acid

Hu, Guangkuo; Ge, Liya; Li, Yuanyuan; Mukhtar, Masood; Shen, Bing Jun; Yang, Desheng; Li, Jiangong

doi:10.1016/j.jcis.2020.06.034

Cited by 123 publications

(50 citation statements)

References 52 publications

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“…The limit of detection (LOD) of Cr(VI) was estimated to be 1.04 mM according to the formula (LOD ¼ 3s/S, wherein s is the standard deviation of the blank signals, S represents the slope of the linear curve). 46 Compared with the previous reported literatures presented in Table S1, † the N,S-CDs in this work expressed better detection performance for Cr(VI). Based on the excellent performance, the N,S-CDs as a "turn-off" uorescent sensor own unique superiorities of sensitivity, selectivity, convenience, green preparation, stability, fast response, origin from renewable resources, etc.…”

Section: Detection Of Cr(vi)supporting

confidence: 38%

Fluorescent “on–off–on” sensor based on N,S co-doped carbon dots from seaweed (Sargassum carpophyllum) for specific detection of Cr(vi) and ascorbic acid

Tian

et al. 2021

RSC Adv.

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Section: Detection Of Cr(vi)supporting

confidence: 38%

Fluorescent “on–off–on” sensor based on N,S co-doped carbon dots from seaweed (Sargassum carpophyllum) for specific detection of Cr(vi) and ascorbic acid

Tian

et al. 2021

RSC Adv.

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“…In addition, benefiting from the dual-model response to pH changing as well as the established analytical method, wound pH could be both predicted theoretically and estimated visually in the case of blood contamination and long-term observations. Besides applications in ions and pH sensing, CDs also show selectivity toward a wide range of biomolecules including amino acids (such as cysteine), glutathione, vitamins (such as vitamin B 12 , vitamin B 7 , ascorbic acid), − formaldehyde, glucose, DNA, and proteins, ,− which are associated with health issues and diseases. Therefore, CDs can provide valuable insights into the diagnostics and early precaution of diseases.…”

Section: Optical Applicationsmentioning

confidence: 99%

Carbon Dots: A New Type of Carbon-Based Nanomaterial with Wide Applications

2020

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Carbon dots (CDs), as a new type of carbon-based nanomaterial, have attracted broad research interest for years, because of their diverse physicochemical properties and favorable attributes like good biocompatibility, unique optical properties, low cost, ecofriendliness, abundant functional groups (e.g., amino, hydroxyl, carboxyl), high stability, and electron mobility. In this Outlook, we comprehensively summarize the classification of CDs based on the analysis of their formation mechanism, micro-/nanostructure and property features, and describe their synthetic methods and optical properties including strong absorption, photoluminescence, and phosphorescence. Furthermore, the recent significant advances in diverse applications, including optical (sensor, anticounterfeiting), energy (light-emitting diodes, catalysis, photovoltaics, supercapacitors), and promising biomedicine, are systematically highlighted. Finally, we envisage the key issues to be challenged, future research directions, and perspectives to show a full picture of CDs-based materials.

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“…Both the quenching constants for the Fe 3+ and AA were one or two orders of magnitude higher than the general considered dynamic quenching constant (DQM), 1.0 × 10 10 M −1 ·s −1 . Thus, the static quenching mechanism (SQM), referring to the reactions between the NFCDs and Fe 3+ or AA, might be responsible for the quenching phenomenon caused by Fe 3+ and AA [ 63 , 64 ].…”

Section: Resultsmentioning

confidence: 99%

One-Step Synthesis of Nitrogen/Fluorine Co-Doped Carbon Dots for Use in Ferric Ions and Ascorbic Acid Detection

et al. 2022

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Carbon dots (CDs) have caught enormous attention owing to their distinctive properties, such as their high water solubility, tunable optical properties, and easy surface modification, which can be generally used for the detection of heavy metals and organic pollutants. Herein, nitrogen and fluorine co-doped carbon dots (NFCDs) were designed via a rapid, low-cost, and one-step microwave-assisted technique using DL-malic acid and levofloxacin. The NFCDs emitted intense green fluorescence under UV lighting, and the optical emission peak at 490 nm was observed upon a 280 nm excitation, with a high quantum yield of 21.03%. Interestingly, the spectral measurements illustrated excitation-independent and concentration-independent single-color fluorescence owing to the presence of nitrogen and fluorine elements in the surface functional groups. Additionally, the NFCDs were applied for the selective detection of Fe3+ and ascorbic acid based on the “turn-off” mode. The detection limits were determined as 1.03 and 4.22 µM, respectively. The quenching mechanisms were explored using the static quenching mechanism and the inner filter effect. Therefore, a NFCDs fluorescent probe with single color emission was successfully developed for the convenient and rapid detection of Fe3+ and ascorbic acid in environments.

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Carbon dots derived from flax straw for highly sensitive and selective detections of cobalt, chromium, and ascorbic acid

Cited by 123 publications

References 52 publications

Fluorescent “on–off–on” sensor based on N,S co-doped carbon dots from seaweed (Sargassum carpophyllum) for specific detection of Cr(vi) and ascorbic acid

Fluorescent “on–off–on” sensor based on N,S co-doped carbon dots from seaweed (Sargassum carpophyllum) for specific detection of Cr(vi) and ascorbic acid

Carbon Dots: A New Type of Carbon-Based Nanomaterial with Wide Applications

One-Step Synthesis of Nitrogen/Fluorine Co-Doped Carbon Dots for Use in Ferric Ions and Ascorbic Acid Detection

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