Development of sulfur doped carbon quantum dots for highly selective and sensitive fluorescent detection of Fe2+ and Fe3+ ions in oral ferrous gluconate samples

Du, Fuyou; Cheng, Zhenfang; Tan, Wei; Sun, Lingshun; Ruan, Guihua

doi:10.1016/j.saa.2019.117602

Cited by 40 publications

(19 citation statements)

References 50 publications

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“…Qi et al [30] utilized a one-step hydrothermal approach to manufacture nitrogen-doped carbon quantum dots N-CQDs with rice residue as carbon source and glycine as nitrogen source, respectively, and then used N-CQDs as the probe to detect Fe 3+ ions and tetracycline antibiotics. Du et al [31] adopted hydrothermal technique using ascorbic acid and thioglycolic acid to synthesize sulfur-doped CQDs, which were used as the fluorescent probe to detect Fe 2+ and Fe 3+ ions in oral ferrous gluconate samples. Chen et al [32] synthesized N-CQDs by hydrothermal method with p-phenylenediamine and ammonia, and the N-CQDs were considered as a multi-functional fluorescence sensor for detecting pH and Fe 3+ ions.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Nitrogen-Doped Carbon Quantum Dots Using Lactic Acid as Carbon Source

Chang

Zhu

et al. 2022

Materials

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Nitrogen-doped carbon quantum dots (N-CQDs) were synthesized in a one-step hydrothermal technique utilizing L-lactic acid as that of the source of carbon and ethylenediamine as that of the source of nitrogen, and were characterized using dynamic light scattering, X-ray photoelectron spectroscopy ultraviolet-visible spectrum, Fourier-transformed infrared spectrum, high-resolution transmission electron microscopy, and fluorescence spectrum. The generated N-CQDs have a spherical structure and overall diameters ranging from 1–4 nm, and their surface comprises specific functional groups such as amino, carboxyl, and hydroxyl, resulting in greater water solubility and fluorescence. The quantum yield of N-CQDs (being 46%) is significantly higher than that of the CQDs synthesized from other biomass in literatures. Its fluorescence intensity is dependent on the excitation wavelength, and N-CQDs release blue light at 365 nm under ultraviolet light. The pH values may impact the protonation of N-CQDs surface functional groups and lead to significant fluorescence quenching of N-CQDs. Therefore, the fluorescence intensity of N-CQDs is the highest at pH 7.0, but it decreases with pH as pH values being either more than or less than pH 7.0. The N-CQDs exhibit high sensitivity to Fe3+ ions, for Fe3+ ions would decrease the fluorescence intensity of N-CQDs by 99.6%, and the influence of Fe3+ ions on N-CQDs fluorescence quenching is slightly affected by other metal ions. Moreover, the fluorescence quenching efficiency of Fe3+ ions displays an obvious linear relationship to Fe3+ concentrations in a wide range of concentrations (up to 200 µM) and with a detection limit of 1.89 µM. Therefore, the generated N-CQDs may be utilized as a robust fluorescence sensor for detecting pH and Fe3+ ions.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Nitrogen-Doped Carbon Quantum Dots Using Lactic Acid as Carbon Source

Chang

Zhu

et al. 2022

Materials

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“…Many reports show that lack or excess Fe 3+ will cause diseases, including Alzheimer's diseases and metal decline . Owing to the non‐destructive character, high sensitivity, selectivity and fast detection, fluorescence analytical method has attracted considerable attention in the determination of Fe 3+ and AA . Many fluorescent probes based on quantum dots, metal clusters], nanosheets or other materials have been reported for Fe 3+ and AA detecting.…”

Section: Introductionmentioning

confidence: 99%

Amino Acids as the Nitrogen Source to Synthesize Boron Nitride Quantum Dots for Fluorescence Turn‐off‐on Detection of Ascorbic Acid

Kong

Zhou

et al. 2020

ChemistrySelect

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The BNQDs are synthesized by simple one-step hydrothermal method, using amino acids as nitrogen source and boric acid as boron source. The BNQDs prepared by different amino acids emit strong blue fluorescence with the excitation wavelength from 280 to 400 nm. An "on-off-on" BNQDs fluorescent sensor is designed to detect ascorbic acid with Fe 3 + as medium, extending the application in sensing. The fluorescence of BNQDs is quenched by Fe 3 + on basis of the inner filter effect.With increasing of ascorbic acid, the fluorescence of BNQDs is recovered due to the oxidation-reduction between Fe 3 + and ascorbic acid. The assay is capable of recognizing ascorbic acid in the concentration range of 1-100 μM with a detection limit of 0.0833 μM. In addition, the method has the potential to determine Fe 3 + and ascorbic acid in real water samples and human serum.

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“…In contrast, sulfur is only reported up to a few percent and exclusively when dedicated precursors are involved in syntheses: sulfur-containing amino acids (cysteine, [72,73] methionine [74] ); sulfur-containing organic acids (lipoic, [53] thioglycolic, [48,75] mercaptosuccinic; [50] and various mercaptans. [47] Likewise, more exotic elements are sometimes involved in syntheses: [76,77] phosphorus, boron, selenium, halogens, alkali metals, with final measured contents always in the order of atomic percent.…”

Section: Elemental Compositionmentioning

confidence: 99%

“…S1. Sources: References [28], [36], [37], [39], [41], [43][44][45][46], [48], [52][53][54][55], [60], [63][64][65][66][67][68][69][70], [72], [73], [78], [79], [80][81][82][83][84][85][86][87][88][89][90][91][92][93][94][95][96][97][98][99].…”

Section: Elemental Compositionmentioning

confidence: 99%

“…In 2022, B. Bartolomei et al demonstrated how the presence of molecular by-products (highlighted by NMR) can lead to misleading conclusion regarding the putative properties of synthesized CDs. [137] In one of their examples, they observed a red and polarized emission from a CDs batch whereas these emissive features were later found to be respectively due to an aromatic by-product and a partly reacted [30], [32], [33], [35][36][37][38], [44], [46][47][48], [52][53][54], [56], [58][59][60], [64], [65], [67], [68], [70], [78], [79], [81], [84], [85], [87], [88], [90][91][92][93][94][95], [97], [98], [110][111][112][113][114][115][116][117], [119]…”

Section: The Molecular Questionmentioning

confidence: 99%

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Carbon Dots for Carbon Dummies: The Quantum and The Molecular Questions Among Some Others

Boëver

Town

et al. 2022

Chemistry A European J

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Carbon Dots (CDs) are carbon nanoparticles which were discovered in 2004. Despite two decades of intensive work from the scientific community and a colossal amount of gathered experimental data, no definitive consensus exists to date on several key aspects such as the actual definition of CDs and the origin of their emissive properties. This review proposes a critical evaluation of these fundamental questions. Lay persons will also find here an alternative introduction to the CDs domain, including synthetic strategies, photophysical properties, as well as challenges and outlook of this exciting new area.

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Development of sulfur doped carbon quantum dots for highly selective and sensitive fluorescent detection of Fe2+ and Fe3+ ions in oral ferrous gluconate samples

Cited by 40 publications

References 50 publications

Synthesis and Properties of Nitrogen-Doped Carbon Quantum Dots Using Lactic Acid as Carbon Source

Synthesis and Properties of Nitrogen-Doped Carbon Quantum Dots Using Lactic Acid as Carbon Source

Amino Acids as the Nitrogen Source to Synthesize Boron Nitride Quantum Dots for Fluorescence Turn‐off‐on Detection of Ascorbic Acid

Carbon Dots for Carbon Dummies: The Quantum and The Molecular Questions Among Some Others

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