N,S co-doped carbon dots based fluorescent “on-off-on” sensor for determination of ascorbic acid in common fruits

Luo, Xueli; Zhang, Wengang; Han, Yong; Chen, Xiu‐Mei; Zhu, Li; Tang, Wenzhi; Wang, Jianlong; Yue, Tianli; Li, Zhonghong

doi:10.1016/j.foodchem.2018.03.032

Cited by 230 publications

(98 citation statements)

References 38 publications

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“…A previous report showed that the photo-induced electron transfer (PET) was the quenching mechanism for the N,S-co-CDs/Fe 3+ system because Fe 3+ is a kind of paramagnetic transition metal ions with half-filled 3d orbits. 15 However, it is noted that there is no spectral overlap between UV absorption spectrum of Fe 3+ and the fluorescence emission spectrum of N,S-co-CDs (Fig. 2B) in our study, which indicated that fluorescence resonance energy transfer (FRET) was not the possible quenching mechanism for the N,S-co-CDs.…”

Section: Resultscontrasting

confidence: 51%

“…Nowadays, all kinds of sensors, especially fluorescence sensors, have attracted more and more interest in the analytical field due to their high sensitivity and selectivity, easy operation, and low cost. 15 In the era of nanotechnology, fluorescent nanomaterials (e.g. quantum dots, metallic nanoclusters, luminescent nanoparticles) have emerged as an integrated research field because they offer superior optical properties, such as brighter fluorescence, wider selections of excitation and emission wavelengths, and higher photostability.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, N,S-co-CDs based fluorescence sensors, including N,S-co-CDs/Fe 3+ and N,S-co-CDs/MnO2 systems, have been applied to the detection of AA via "on-off-on" switchable model. 15,19 In the N,S-co-CDs/Fe 3+ system, the original fluorescence of N,S-co-CDs was firstly quenched by Fe 3+ and then recovered by AA, which exhibited lots of merits, such as higher selectivity, nontoxicity, and high photo-induced electron transfer. However, the preparation method for N,S-co-CDs is extensively focused on the hydrothermal method, which is limited by timeconsuming, rigorous experimental conditions, and difficulty of obtaining CDs powder directly.…”

Section: Introductionmentioning

confidence: 99%

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Microwave-assisted Synthesis of N,S-co-carbon Dots as Switch-on Fluorescent Sensor for Rapid and Sensitive Detection of Ascorbic Acid in Processed Fruit Juice

et al. 2019

ANAL. SCI.

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To achieve a rapid, sensitive, and economical method for the detection of ascorbic acid (AA) in the presence of Fe 3+ , a nitrogen and sulfur co-doped carbon dots (N,S-co-CDs) based fluorescence sensing system was developed. In this work, N,S-co-CDs were successfully synthesized via a one-step microwave-assisted method within 2.5 min using ammonium citrate and L-cysteine as precursors. The fluorescence of N,S-co-CDs was quenched (off) by Fe 3+ through a static-quenching mechanism. Subsequently, the fluorescence was recovered (on) after introducing AA into the quenched system, which was attributed to the reduction effect of AA for Fe 3+. Therefore, a switch-on sensor (N,S-co-CDs/Fe 3+ system) was developed for AA detection. Under optimal conditions, the limit of detection (LOD) of 2.31 μmol/L for AA was obtained over a linear range from 0 to 150 μmol/L. Furthermore, the proposed sensing method was successfully applied to detect AA in processed fruit juice with satisfactory results. The most important is that the sensor derived from a microwave-assisted method has simple and eco-friendly synthesis processes, is rapid, and has high detection efficiency. Therefore, such a switch-on sensor may be a promising candidate sensor for AA detection in processed fruit samples.

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Section: Resultscontrasting

confidence: 51%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microwave-assisted Synthesis of N,S-co-carbon Dots as Switch-on Fluorescent Sensor for Rapid and Sensitive Detection of Ascorbic Acid in Processed Fruit Juice

et al. 2019

ANAL. SCI.

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“…Last report demonstrated that the low crystalline would be helpful to increase the surface defects of lattice, which further improve the pseudocapacitive contributions. [55,56] Moreover, no peaks of NiO bonds at 400 cm −1 was found in the Figure S1 (Supporting Information). In the inset of Figure 1c, the emerging D peak (amorphous carbon) and G peak (graphitic carbon) demonstrated the existence of carbon.…”

Section: Exploring the Physical-chemical Properties Of Ni-pr C-nise mentioning

confidence: 99%

Hierarchical Hollow‐Microsphere Metal–Selenide@Carbon Composites with Rational Surface Engineering for Advanced Sodium Storage

et al. 2018

Advanced Energy Materials

263

144

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As a result of its high‐energy density, metal–selenides have demanded attention as a potential energy‐storage material. But they suffer from volume expansion, dissolved poly‐selenides and sluggish kinetics. Herein, utilizing' thermal selenization via the Kirkendall effect, microspheres of NiSe2 confined by carbon are successfully obtained from the self‐assembly of Ni‐precursor/PPy. The derived hierarchical hollow architecture increases the active defects for sodium storage, while the existing double N‐doped carbon layers significantly alleviate the volume swelling. As a result, it shows ultrafast rate capability, delivering a stable capacity of 374 mAh g−1, even after 3000 loops at 10.0 A g−1. These remarkable results may be ascribed to the NiOC bonds on the interface of NiSe2 and the carbon film, which leads to the faster transfer of ions, the effective trapping of poly‐selenide, and the highly reversible conversion reaction. The kinetic analysis of cyclic voltammetry (CV) demonstrates that the electrochemical process is mainly dominated by pseudocapacitive behaviors. Supported by the results of electrochemical impedance spectroscopy (EIS), it is confirmed that the solid–electrolyte interface films are reversibly formed/decomposed during cycling. Given this, this elaborate work might open up a potential avenue for the rational design of metal‐sulfur/selenide anodes for advanced battery systems.

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“…The typical fluorescent properties of QDs such as CdTe, carbon, Au, and Cu enable them widely used for labeling in cell imaging and immunoassays. Direct signal‐on and ‐off fluorescence methods have also been developed to detect metal ions and biomolecules selectively, which are dependent on the ligands on the surface and structures of QDs . For example, Fe 3+ anneal the fluorescence intensity of Si‐doped carbon QDs (CQDs) because of the chelation of Fe 3+ with the amino groups adsorbed on CQDs .…”

Section: Introductionmentioning

confidence: 99%

Synergistic Enhancement Effects of Carbon Quantum Dots and Au Nanoclusters for Cathodic ECL and Non‐enzyme Detections of Glucose

Han

Gao

et al. 2020

Electroanalysis

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In this study, we found that glucose enhance electrochemiluminescence (ECL) intensity of both Au nanoclusters (Au NCs) and carbon quantum dots (CQDs) with K2S2O8 as the co‐reactants. The enhancing effects by Au NCs and CQDs were overlapped, enabling the detection of glucose. The increased ECL intensity of glucose was linear with the logarithm of concentrations of glucose in the range of 50 μM–3.0 mM, and the limit of detection is 20 μM. Anti‐interruption ability was achieved, and ascorbic acid, urea, and uric acid had little influence to glucose detection. This method realized the direct detection of glucose by enhancing ECL of Au NCs and CQDs, which was fast and economic, possessing potential applications for glucose detection in human serum.

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N,S co-doped carbon dots based fluorescent “on-off-on” sensor for determination of ascorbic acid in common fruits

Cited by 230 publications

References 38 publications

Microwave-assisted Synthesis of N,S-co-carbon Dots as Switch-on Fluorescent Sensor for Rapid and Sensitive Detection of Ascorbic Acid in Processed Fruit Juice

Microwave-assisted Synthesis of N,S-co-carbon Dots as Switch-on Fluorescent Sensor for Rapid and Sensitive Detection of Ascorbic Acid in Processed Fruit Juice

Hierarchical Hollow‐Microsphere Metal–Selenide@Carbon Composites with Rational Surface Engineering for Advanced Sodium Storage

Synergistic Enhancement Effects of Carbon Quantum Dots and Au Nanoclusters for Cathodic ECL and Non‐enzyme Detections of Glucose

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