Hydrothermal synthesis of carbon quantum dots from biowaste for bio-imaging

Yro, Persia Ada N. de; Quaichon, Gerald Mari O.; Cruz, R. A. T.; Emolaga, Carlo S.; Que, Mar Christian O.; Magdaluyo, Eduardo R.; Basilia, Blessie A.

doi:10.1063/1.5094310

Cited by 31 publications

(15 citation statements)

References 5 publications

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“…A greener synthesis of water-soluble fluorescent carbon quantum dots (~ 260-400 nm) was reported via a simple one-step hydrothermal treatment using Tamarindus indica leaves; these biocompatible carbon quantum dots can be potentially applied in sensing, bioimaging, disease diagnostics, and other analytical applications (Bano et al 2018). Another facile approach for producing fluorescent carbon quantum dots entails the hydrothermal treatment of pineapples (Ananas comosus) and calamansi (Citrofortunella microcarpa) wastes (de Yro et al 2019). The Escherichia coli, fluoresced with carbon quantum dots as effective probe, have been applied for bioimaging applications.…”

Section: Eco-friendly and Sustainable Synthesis Of Carbon Quantum Dotsmentioning

confidence: 99%

“…The Escherichia coli, fluoresced with carbon quantum dots as effective probe, have been applied for bioimaging applications. The generation of hydrogen bonds between the bacterial cells and carbon quantum dots facilitated the attachment of these quantum dots onto the bacteria (de Yro et al 2019).…”

Section: Eco-friendly and Sustainable Synthesis Of Carbon Quantum Dotsmentioning

confidence: 99%

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Green synthesis, biomedical and biotechnological applications of carbon and graphene quantum dots. A review

2020

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Carbon and graphene quantum dots are prepared using top-down and bottom-up methods. Sustainable synthesis of quantum dots has several advantages such as the use of low-cost and non-toxic raw materials, simple operations, expeditious reactions, renewable resources and straightforward post-processing steps. These nanomaterials are promising for clinical and biomedical sciences, especially in bioimaging, diagnosis, bioanalytical assays and biosensors. Here we review green methods for the fabrication of quantum dots, and biomedical and biotechnological applications.

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Section: Eco-friendly and Sustainable Synthesis Of Carbon Quantum Dotsmentioning

confidence: 99%

Section: Eco-friendly and Sustainable Synthesis Of Carbon Quantum Dotsmentioning

confidence: 99%

Green synthesis, biomedical and biotechnological applications of carbon and graphene quantum dots. A review

2020

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“…CQDs synthesis via the hydrothermal technique was also demonstrated by using precursors such as glucose and monopotassium phosphate (KH 2 PO 4 ) . The facile technique can be used to synthesize water-soluble or insoluble CQDs by changing the composition of the reaction mixtures . Heteroatom doping allows this technique to be used in the design and synthesis of new electrocatalysts with controllable doping composition and electronic structures …”

Section: Synthesis Of Cqdsmentioning

confidence: 99%

Carbon Quantum Dots for Energy Applications: A Review

Rasal

Yadav

et al. 2021

ACS Appl. Nano Mater.

218

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Carbon quantum dots (CQDs) are a class of carbon nanomaterials that have recently gained recognition as current entrants to traditional semiconductor quantum dots (QDs). CQDs have the desirable advantages of low toxicity, environmental friendliness, low cost, photostability, favorable charge transfer with enhanced electronic conductivity, and their comparable easy synthesis protocols. This article examines advancements in CQD research and development, with a focus on their synthesis, functionalization, and energy applications. Initially, various synthesis methods are discussed briefly with pros and cons. Herein, first top-down methods including arc discharge technique, laser ablation technique, plasma treatment, ultrasound synthesis technique, electrochemical technique, chemical exfoliation, and combustion were discussed briefly. The later section presents bottom-up (microwave synthesis, hydrothermal synthesis, thermal pyrolysis, and MOF template-assisted approach) and waste-derived CQDs synthesis methods. The next section is focused on the energy applications of CQDs including supercapacitors, lithium-ion batteries, photovoltaics, hydrogen (HER), and oxygen evolution reaction (OER). Finally, challenges and perspectives in this exciting and promising area are presented.

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“…The top-down approach consists of fragmenting bulk carbonaceous matter or etching the surface to smaller moieties, which involves the use of methods like arc discharge, , laser ablation, , electrochemical oxidation, − ultrasonication, lithography (exfoliation of the surface), , and chemical oxidation . The bottom-up method consists of dehydration and carbonization by microwave-assisted pyrolysis, − cage opening of fullerene, solution-chemistry-based methods, and hydrothermal synthesis from glucose − and pineapple waste . The bottom-up method products formed by citric acid as a precursor show high PL because of the presence of a core or a small fluorophore …”

Section: Introductionmentioning

confidence: 99%

Ultrafast Dynamics in Carbon Dots as Photosensitizers: A Review

Deshmukh

Deore

Mondal

2021

ACS Appl. Nano Mater.

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Electron transfer (ET) is an ultimate property of chemical and biological processes and photochemistry, which is the root of the world. Thus, photoinduced electron transfer (PET) is a fundamental focus of modern research applied in biosensing, solar energy conversion, optoelectronics, and photocatalysis, where light-induced charge separation takes place within the reaction system. The reaction system is made by the combination of a photosensitizer, an electron donor or acceptor, and photocatalysis to control the reaction and offers the best path to reach the goal. In this review, we focus on the photosensitizer capability of carbon dots (C-Dots), investigating the fundamental charge-transfer (CT) processes of C-Dots in different confined environments, surface-modified C-Dots, and doped C-Dots utilizing a combined study of steady-state and time-resolved spectroscopic methods, such as time-correlated single photon counting, ultrafast transient absorption, and fluorescence up-conversion techniques. Thus, it is essential to investigate light-induced fundamental phenomena like charge separation, CT, and charge recombination to increase the efficiency of C-Dots-based materials. Both covalent and noncovalent interactions between C-Dots and quenchers (redox-active material) are used here to investigate the CT process in C-Dots. The photosensitizer behavior of C-Dots has been explored in the confined environments of micelle, reverse micelle, and cyclodextrin. Because of the presence of different surface groups, in click chemistry, mainly a coupling reaction is used for the surface modification of C-Dots using different redox-active small organic molecules such as dopamine, porphyrins, etc. Finally, carrier dynamics of doped C-Dots are successfully discussed in the absence and presence of a quencher. Also, it is observed that the fundamental charge-separation process will promote their use in a variety of photocatalysis, photovoltaic, and optoelectronic devices, photodetectors, and photoresponsive electronic transistors.

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Hydrothermal synthesis of carbon quantum dots from biowaste for bio-imaging

Cited by 31 publications

References 5 publications

Green synthesis, biomedical and biotechnological applications of carbon and graphene quantum dots. A review

Green synthesis, biomedical and biotechnological applications of carbon and graphene quantum dots. A review

Carbon Quantum Dots for Energy Applications: A Review

Ultrafast Dynamics in Carbon Dots as Photosensitizers: A Review

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