Green synthesized carbon nanodots as a fluorescent probe for selective and sensitive detection of iron(III) ions

Vikneswaran, R.; Subramaniam, Ramesh; Yahya, Rosiyah

doi:10.1016/j.matlet.2014.08.063

Cited by 95 publications

(40 citation statements)

References 19 publications

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“…Apparently, N mainly exists as doping element in the core of the N-CDs, contributing to increase its QY. The absorption of the carbonyl group (C@O) at 1630 cm À1 is weak, due to the minor oxidation of the N-CDs in the outer surface [48], which explains the presence of the band at 1070-1030 cm À1 , attributed to the CAOAC stretching mode in N-CDs [49].…”

Section: Synthesis and Analysis Of Cds And N-cds Nanoparticlesmentioning

confidence: 99%

Fluorescent chemosensor for pyridine based on N-doped carbon dots

Campos

Abellán

Zougagh

et al. 2015

Journal of Colloid and Interface Science

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Section: Synthesis and Analysis Of Cds And N-cds Nanoparticlesmentioning

confidence: 99%

Fluorescent chemosensor for pyridine based on N-doped carbon dots

Campos

Abellán

Zougagh

et al. 2015

Journal of Colloid and Interface Science

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“…For Hg 2+ assaying, CDs from pomelo peel and cucumber have been used . It is also reported that CDs from sweet potatoes and banana peels can be used for Fe 3+ sensing . CDs can sense Fe 3+ , Cu 2+ , and Hg 2+ due to the presence of hydroxyl groups, amino groups, and carboxyl groups, respectively .…”

Section: Introductionmentioning

confidence: 99%

A facile synthesis of nontoxic luminescent carbon dots for detection of chromium and iron in real water sample and bio‐imaging

et al. 2019

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In this study, we have reported the synthesis of luminescent carbon dots (CDs) from indigenous potato sources by simple heating reactions. The as‐synthesized CDs exhibited an average size of ~ 5.97 nm with a quantum yield (QY) of 6.08%. Furthermore, the CDs possessed high water‐solubility, possibly due to the presence of ─COOH and ─OH groups on their surfaces. The quenching of luminescence of the CDs specifically by Cr6+ and Fe3+ ions was used to detect chromium and iron in the water sample. The minimum limit of detection (LOD) for Cr6+ and Fe3+ ions was found to be 0.012 μM and 0.000549 μM, respectively, in a linear range of 0.5 μM‐100 μM and 0.5 μM‐5 μM for Cr6+ and Fe3+, respectively, which was well below the concentration specified by WHO. We used our sensing system to detect the metal ions in water from the Brahmaputra River as well as in tannery water. In addition, the MTT‐based cell viability experiments showed that the CDs were nontoxic within 200 μg/mL. High quantum yield and the easy uptake of CDs enabled the quick labelling of cytoplasm of the HeLa cells, which can be further attributed to bioimaging applications.

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“…Besides, no obvious interferences on the fluorescence of CDs were observed for other cations and typical amino acids. CDs synthesized by microwave irradiation of banana peels could also be used for the detection of Fe 3+ with the similar process [47]. Gong et al synthesized CDs by microwaveassisted pyrolysis of chitosan, acetic acid and 1,2-ethylenediamine for sensing Fe 3+ [48].…”

Section: Iron (Iii) Ion Detectionmentioning

confidence: 99%

Carbon dots: synthetic methods and applications as fluorescent probes for the detection of metal ions, inorganic anions and organic molecules

et al. 2015

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and biological materials. It has been found that fluorescent probes are one of the most successful approaches. Fluorescent probes such as organic molecules have the advantages of high sensitivity and fast analysis, but they suffer from low water solubility. Semiconductor quantum dots (QDs) can be used as fluorescent probes, while the issue of toxicity limits their practical applications [1,2]. Fluorescent carbon dots (CDs) with similar physicochemical properties of QDs and relatively low in toxicity and cost of synthesis are the most suitable alternatives to organic molecules and QDs [3]. CDs gradually become a rising star as fluorescent probes in a number of fields [4,5]. CDs, a new member of carbon nanomaterial family with diameter below 10 nm, have great fluorescent performance, excellent dispersity and biocompatibility [6,7]. The synthetic methods of CDs can be classified into top-down and bottom-up approaches [8].Top-down methods rely on reducing the size of the graphite-like structures until the products become fluorescent nanoparticles. In the bottom-up processes, anything with carbogenic nature can synthesize CDs under suitable conditions [9]. Always the synthetic strategies and the precursors affect the internal properties of the resulting nanoparticles such as the size, crystallinity, oxygen or nitrogen content, emission characteristics and compatibility with a particular solvent [10][11][12][13]. Particularly, with the advantages of great dispersibility in water and tunable fluorescence, CDs are also becoming attractive alternatives for novel fluorescence markers, fluorescent probes and optical probes [14,15].In this review, we mainly summarize the recent advances of CDs about the easy synthesises, sensitive fluorescent detections of ions and organic molecules and possible detection mechanisms. It is our aim that the synthesis of this knowledge will offer valuable insight and inspire research into the exciting areas. Some suggestions and an outlook are put forward about the applications of CDs.Abstract Carbon dots (CDs), a new class of fluorescent materials, have recently attracted considerable research interest. CDs have overcome some defects of traditional nanomaterial. In addition to their small size and optical properties, CDs have the excellent advantages of good biocompatibility and are easy to achieve surface functionalization. Since this discovery, CDs can be widely used in the field of biochemical sensing and environmental testing. This article reviews the progress in the research and development of CDs on their syntheses, applications for the fluorescence detection and possible mechanisms. Finally, we have an outlook of the research trends and future prospects of CDs.

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Green synthesized carbon nanodots as a fluorescent probe for selective and sensitive detection of iron(III) ions

Cited by 95 publications

References 19 publications

Fluorescent chemosensor for pyridine based on N-doped carbon dots

Fluorescent chemosensor for pyridine based on N-doped carbon dots

A facile synthesis of nontoxic luminescent carbon dots for detection of chromium and iron in real water sample and bio‐imaging

Carbon dots: synthetic methods and applications as fluorescent probes for the detection of metal ions, inorganic anions and organic molecules

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