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Carbon Quantum Dots - Crossref

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Last Updated: 28 November 2022

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Eco-friendly Synthesis of Carbon Quantum Dots as an Effective Adsorbent

Abstract Fluorescent carbon quantum dots were produced by an easy, green, and single-step process with the help of microwave drying of urea with bagasse, cellulose, or carboxymethyl cellulose. The results established that CQDs synthesized from CMC, cellulose, and SCB as highly useful products for further use in the fields of wastewater pollution detection, adsorption, and chemical sensing applications. All CQDs isotherms fit well with the Langmuir model, according to the kinetics and Temkin models, although Freundlich and Temkin models perform better with the Langmuir model.

Source link: https://doi.org/10.1007/s10895-022-03085-z


Synthesis, Characterization and Applications of Plain and Non-Metal Doped, Biomass-Derived Carbon Quantum Dots: A Short Review

Carbon dots, very small particles, have piqued scientific attention in recent years, thanks to their unique properties, such as low-cost synthetic protocols, fast and flexible modification techniques, and low toxicity. In this section, functional nanosensors with luminescent properties are in high demand in bioanalysis, and doped carbon dots play a significant role. Metal ions are detected in biological samples, bioimaging, and DNA studies, and B, C. N, P, N, P, and S doped carbon dots are used in the detection of metal ions in biological samples, bioimaging, and DNA experiments.

Source link: https://doi.org/10.14233/ajchem.2022.24044


Modifying SnS2 With Carbon Quantum Dots to Improve Photocatalytic Performance for Cr(VI) Reduction

SnS 2 is a promising narrow bandgap photocatalyst, but its poor charge carrier separation issues should be addressed first. In this research, N-doped carbon quantum dots were manufactured and loaded onto SnS 2 nanoparticles by an in situ method. NC@SnS 2 was doping at the following dose: citric acid: SnS 2 = 1. 2 mmol:3. 0 mmol. It was confirmed that SnS 2 with CQDs will not only enhance the light-harvesting capability, but also enhance the charge separation, which would also improve SnS 2's photoreactivity toward Cr reduction.

Source link: https://doi.org/10.3389/fchem.2022.911291


Investigating the effect of N-doping on carbon quantum dots structure, optical properties and metal ion screening

Abstract: Carbon quantum dots derived from biomass, a novel green alternative for nanomaterial synthesis, are often lacking optical stability and have low photoluminescence quantum yields, according to the author. To produce effective nitrogen-doped carbon quantum dots from biomass precursors, this report used an environmentally friendly, cost-effective, continuous flow synthesis method. Optimised N-CQDs with a PLQY of 9. 6% compared to pure glucose derived-CQDs without nitrogen doping, which have a PLQY of less than 1%.

Source link: https://doi.org/10.1038/s41598-022-16893-x


Novel Metal-Free Composite Electrodes with Carbon Quantum Dots and Anion-Conducting Ionomers for the Oxygen Reduction Reaction

Platinum is widely used as a catalyser, particularly in proton exchange membrane fuel cells. Platinum, given its rarity and cost, is not a viable option as a catalyst, so there is a need to switch to alternative materials, such as a metal-free catalyst in anion exchange membrane fuel cells. We concentrate on the oxygen reduction reaction in alkaline medium with a novel metal-free catalyst composite with carbon quantum dots and anion exchange ionomer in this research.

Source link: https://doi.org/10.1149/ma2022-02572172mtgabs


(Digital Presentation) Dopamine Detection at Green Carbon Quantum Dots Based Electrochemical Sensor

The CuO NPs modified glassy carbon electrode gCQDs modified GCE and the nanocomposite modified GCE has the best electrocatalytic capacity against DA detection, according to the comparative cyclic voltammogram. The composite modified GCE has the lowest charge transfer resistance, according to a Nyquist plot of electrochemical impedance spectroscopy results. The proposed sensor can restore 94. 8 percent DA from the original sample solution, according to the real sample analysis of DA in dopamine hydrochloride injection.

Source link: https://doi.org/10.1149/ma2022-02632488mtgabs


(Invited, Digital Presentation) Surface Engineering of Fluorescent CsPbBr 3 and Carbon Quantum Dots By Perfluorocarboxylic Acid

CsPbX 3 perovskite quantum dots are a very useful product with a narrow fluorescence peak and tunable emission hue due to halogen composition. CsPbX 3 QDs can be synthesized by hot injection and room temperature precipitation techniques, using oleic acid and oleylamine as surface ligands. Low stability is one of the QDs' main issues; the main reason for the desorption of OA and ammonium groups of OLA is the quick proton transfer between the carboxylate groups of OA and the ammonium groups of OLA; the desorption of OA and OLA on the QD's surface. Fluorescent carbon quantum dots, which are attracting attention as an alternative to harmful QDs. We will see that fluorescence solvantochromism of CQDs synthesized from phenylenediamine can be modulated by surface modification with peroxidyl acid [2].

Source link: https://doi.org/10.1149/ma2022-02511983mtgabs


(Keynote, Digital Presentation) First-Principles Study of Optical and Electronic Properties of Carbon Quantum Dots

NIG groups on the carbon edges are highly influential for small carbon quantum dots' emission characteristics, which have been shown by new experiments, and it could lead to charge-carrier multiplication. Surface oxidation does not influence the absorption in the visible light range, but it does lead to variation in the UV absorption.

Source link: https://doi.org/10.1149/ma2022-0220906mtgabs


Synthesis of Alginate-Nanoporous Silica Gel Beads Functionalized with Carbon Quantum Dots for Environmental Remediation Applications

The alginate gel beads, which are functionalized with carbon quantum dots, are synthesized and used for filtering heavy metals from water in this research project. 900-90, 1 & 1, 2010 Abdel-Fattah, Chemical Engineering Journal, 49, 109, 1063-1076 Me Mahmoud,. . 44, 1056, 1078, 102, 175, 1076-97, 1 93, 1066-091, mm Osgood, B Maudel-Fattah, Journal of Environmental Science and Health, 49, 1090-304, 31-50, 88, 49, 59, 1070, B Khal-M Mahm M Os, M Fah M T Os, 82, t, T ; 96, , moud, M T B Khal-M 36, M 79, 48, 003 t A 94, 311, t A Tek M A, 77, B Khal-H, M 111, M, 47, ta, M Huff, K M Huff, M Soh, 83, 82, M Khal-M M H, M K M B.

Source link: https://doi.org/10.1149/ma2022-028670mtgabs


A REVIEW ON CARBON/GRAPHENE QUANTUM DOTS AND THEIR APPLICTAIONS IN ANODE OF LITHIUM-ION BATTERIES

This story is all about a pioneering carbon nanomaterial Carbon/Graphene quantum dot u201c]" and graphene dot u201c. u201c;" says the author. CQDs are carbon nanoparticles that are smaller than ten nm. We'll talk about their usage in Lithium-ion batteries in this paper. These batteries are especially promising energy storage devices due to their high volume, quick charge-discharge rates, light weight, and high stability. These rechargeable batteries have proven to be a rising star, with plenty of room to expand in anticipation of future energy demands. This report will include an overview of carbon quantum dots as an anode for Li-ion batteries as well as the advantages of carbon anodes. It also explains why carbon quantum dots and their composites are the best anode materials for lithium-ion batteries, as demonstrated by the author. We'll give you a brief overview of several carbon anodes as well as a thorough investigation of various anodic substances that are now available.

Source link: https://doi.org/10.29121/ijetmr.v9.i11.2022.1247

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions