Synthesis of multi-color fluorescent carbon quantum dots and solid state CQDs@SiO2 nanophosphors for light-emitting devices

Song, Xiaoqian; Guo, Qianyi; Cai, Zhenlu; Qiu, Jianrong; Dong, Guoping

doi:10.1016/j.ceramint.2019.05.299

Cited by 62 publications

(37 citation statements)

References 32 publications

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“…The emission wavelengths of CDs can be controllably modified through the whole visible region (blue, green, yellow, orange, or red CDs@ZIF‐8 in Figure ). Among them, blue CDs (B‐CDs) can be excited by ultraviolet (UV) light with the quantum yield (QY) over 40%, which makes sense to improve the accuracy of detection 36 . Rare‐earth ions exhibit a superiority of chemical stability and photostability due to the unique 4f transitions shield by the outside 5d electrons.…”

Section: Resultsmentioning

confidence: 99%

“…Among them, blue CDs (B-CDs) can be excited by ultraviolet (UV) light with the quantum yield (QY) over 40%, which makes sense to improve the accuracy of detection. 36 Rare-earth ions exhibit a superiority of chemical stability and photostability due to the unique 4f transitions shield by the outside 5d electrons. In this paper, europium ion (Eu 3+ ) is chosen to be the insensitive fluorophore based on the following two reasons.…”

Section: Rational Designmentioning

confidence: 99%

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Embedding carbon dots in Eu³⁺‐doped metal‐organic framework for label‐free ratiometric fluorescence detection of Fe³⁺ ions

et al. 2020

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Fluorescent detection is a new spectroscopic measurement for ions sensing due to the advantages of real-time determination with high selectivity, accuracy, and low cost. However, chemosensors based on fluorescent detection are usually determined by absolute intensity from a monochromatic emission signal, which is easy to be fluctuated by the external environment, especially for Fe 3+ detection in complex fluids. Herein, we rationally design a dual-emission Eu 3+ : CDs@ZIF-8 to construct a ratiometric fluorescent sensor with self-calibrating ability for Fe 3+ determination. High efficient carbon dots (CDs) are embedded in europium ions (Eu 3+)-doped MOF by simple stirring preparation at room temperature. The label-free ratiometric fluorescent probe (I CDs@ZIF-8 /I Eu) exhibits simultaneous blue and red emission under the same excitation at 365 nm. Remarkably, Eu 3+ : CDs@ZIF-8 displays the superiority of high selectivity to Fe 3+ , which shows ratiometric fluorescence characteristics (I 0 /I) in a range of 0-6 μmol\L with a low limit of detection (LOD) of 0.897 μmol\L. Besides, the CDs-MOF nanocomposite holds good aqueous dispersibility and low cytotoxicity, which shows great potential applications in medical aid including biological detection and clinical diagnosis. K E Y W O R D S carbon dots, Fe 3+ detection, metal-organic framework, ratiometric fluorescent probe | 887 GUO et al.

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Section: Resultsmentioning

confidence: 99%

Section: Rational Designmentioning

confidence: 99%

Embedding carbon dots in Eu³⁺‐doped metal‐organic framework for label‐free ratiometric fluorescence detection of Fe³⁺ ions

et al. 2020

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“…Furthermore, CDs are biocompatible and have low toxicity. [4][5][6]10 Such a set of characteristics makes them an excellent alternative to heavy-metal quantum dots for biomedical and pharmaceutical applications. 4,10,11 For instance, the antiviral activity of CDs has been investigated.…”

mentioning

confidence: 99%

“…[4][5][6]10 Such a set of characteristics makes them an excellent alternative to heavy-metal quantum dots for biomedical and pharmaceutical applications. 4,10,11 For instance, the antiviral activity of CDs has been investigated. [12][13][14] Łoczechin et al 13 reported the efficacy of functionalized CDs against human coronavirus (HcoV-229E) due to the interaction of CDs with HcoV-229E S-protein.…”

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confidence: 99%

“…Interestingly, the CDs' light emission can be adjusted by varying reaction parameters, surface modification, and manipulation of functional groups. 10 However, the ability of CDs to emit fluorescence when attached to solid supports depends on its dispersion, considering that aggregation has a quenching effect. In order to avoid that, Multifunctional fibers, such as those containing CDs, can be combined into continuous structures such as nanofibers yarns, which are an attractive alternative for biomedical applications.…”

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Biocompatible and fluorescent polycaprolactone/silk electrospun nanofiber yarns loaded with carbon quantum dots for biotextiles

Cotrim

Oréfice

2020

Polymers for Advanced Techs

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Carbon quantum dots (CDs) are attractive nanoparticles for several applications, due to inherent properties such as excitation dependent photoluminescence emission and chemical stability. In the present work, we synthesized CDs from silk (Bombyx Mori) by a microwave-assisted method. The resultant spherical nanoparticles with high fluorescence under UV light were incorporated into PCL/silk matrix and electrospun into continuous nanofiber yarns (NF-Ys) by a one-step method. Besides granting yarns fluorescence, CD inclusion contributed to a decrease in fiber diameter and an increase in strength by 2.7-fold. Cell viability studies with mammalian lung cell lines show viability above 80%, suggesting good biocompatibilty. Such yarns show the potential to be assembled into larger structures such as biotextiles, with possible multifunctionalities such as antiviral, antibacterial, and biosensing applications.

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A Review on Carbon Quantum Dot Based Semiconductor Photocatalysts for the Abatement of Refractory Pollutants

et al. 2022

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Photocatalysis is a green approach frequently utilised to eliminate a variety of environmentally hazardous refractory pollutants. Accordingly, the modification of semiconductor photocatalysts with Carbon Quantum Dots (CQDs) is of great importance for the treatment of such pollutants due to their attractive physical and chemical properties. CQDs are a perfect candidate to handle photocatalysts of high‐performance since they operate as co‐catalysts and as visible light harvesters. The higher separation rate of electron‐hole pairs in the photocatalytic system is attributable to better photodegradation efficiency. This review classifies CQD based photocatalysts as pure, doped and composite materials and discusses the specific advantages of CQDs in visible light‐driven photocatalysis. In this work, the versatile roles of CQDs in CQD‐based photocatalytic systems are thoroughly discussed and summarised.

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Synthesis of multi-color fluorescent carbon quantum dots and solid state CQDs@SiO2 nanophosphors for light-emitting devices

Cited by 62 publications

References 32 publications

Embedding carbon dots in Eu³⁺‐doped metal‐organic framework for label‐free ratiometric fluorescence detection of Fe³⁺ ions

Embedding carbon dots in Eu³⁺‐doped metal‐organic framework for label‐free ratiometric fluorescence detection of Fe³⁺ ions

Biocompatible and fluorescent polycaprolactone/silk electrospun nanofiber yarns loaded with carbon quantum dots for biotextiles

A Review on Carbon Quantum Dot Based Semiconductor Photocatalysts for the Abatement of Refractory Pollutants

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Synthesis of multi-color fluorescent carbon quantum dots and solid state CQDs@SiO2 nanophosphors for light-emitting devices

Cited by 62 publications

References 32 publications

Embedding carbon dots in Eu3+‐doped metal‐organic framework for label‐free ratiometric fluorescence detection of Fe3+ ions

Embedding carbon dots in Eu3+‐doped metal‐organic framework for label‐free ratiometric fluorescence detection of Fe3+ ions

Biocompatible and fluorescent polycaprolactone/silk electrospun nanofiber yarns loaded with carbon quantum dots for biotextiles

A Review on Carbon Quantum Dot Based Semiconductor Photocatalysts for the Abatement of Refractory Pollutants

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Embedding carbon dots in Eu³⁺‐doped metal‐organic framework for label‐free ratiometric fluorescence detection of Fe³⁺ ions

Embedding carbon dots in Eu³⁺‐doped metal‐organic framework for label‐free ratiometric fluorescence detection of Fe³⁺ ions