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Carbon Quantum Dots - Springer Nature

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Last Updated: 28 September 2022

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Efficient Z-scheme g-C_3N_4/MoO_3 heterojunction photocatalysts decorated with carbon quantum dots: improved visible-light absorption and charge separation

Photocatalysts based on g-C_3N_4 will typically need to recombine g-C_3N_4 and a wide bandgap semiconductor. Moreover, the charge carrier separation function is also favourable in the charge carrier separation effect. The composite catalyst has a broad-spectrum reaction to visible light, and its overall results are clearly superior to that of the binary MoO_3N_4 heterojunction. The new equipped CQDs/G_3N_4/MoO_3 is a versatile photocatalyst for the removal of various hazardous pollutants in the environment, due to its high reliability and versatility.

Source link: https://doi.org/10.1007/s11164-022-04804-8


A ratiometric fluorescence method based on nitrogen-doped carbon quantum dots for the determination of the activity of alkaline phosphatase

ALP enables the conversion of ascorbic acid 2-phosphate into ascorbic acid. In the presence of Cu2+, then, AA will react with o-phenylenediamine to produce 3-furo[3,4b]-quinoxaline, a blue fluorescent quinoxaline derivative with emission at 435 nm. At 555 nm, YNCDs have yellow fluorescence emission and can be kept stable in the QXD reaction system. We can determine ALP activity by monitoring the fluorescence ratio using the fluorescence of YNCDs at 555 nm as a reference signal and QXD's fluorescence at 435 nm as a report signal.

Source link: https://doi.org/10.1007/s00216-022-04329-4


Carbon Quantum Dots Decorated Bismuth Oxychloride Nanocomposites with Enhanced Photocatalytic Activity Towards Pollutants Degradation and Mechanism Study

A series of carbon quantum dots decorated bismuth oxychloride was created by a solvothermal technique and served as photocatalysts for Rhodamine B degradation under visible light in this work. 97% RhB can be eliminated in 40 minutes by CQDs/BiOCl-8, which is 11. 3 times higher than pure BiOCl. The superoxide and hole were the most common reactive oxygen species for RhB degradation, according to Quenching experiments.

Source link: https://doi.org/10.1007/s10562-022-04165-2


Carbon quantum dot induced hemolysis and anti-angiogenesis in proliferating cancers with Vitis vinifera as the source material

Carbon quantum dots are nanoscale carbon particles with a diameter ranging from 1 to ten nanometers. Our research investigate focuses on the chemical synthesis of carbon quantum dots from Vitis vinifera L. seeds. To biosynthesize carbon quantum dots, phytochemicals, terpenoids, tannins, saponins, glycosides, alkaloids, phenols, and flavonoids were among the Vitis vinifera L. seeds discovered in Vitis vinifera L. seeds, such as steroids, terpenoids, tannins, phenols, alkaloids, phenols, flavonoids, and flavonoids were added to det Prohocyanidin was discovered in grape seeds and carbon quantum dots, according to the researchers. In this research, we investigated the anticancer characteristics of biogenic carbon quantum dots in vitro as well as their hemolysis activity. Synesized carbon quantum dots have an eco-friendly, quick manufacturing process that may be used in large-scale industrial production of anti-angiogenetic substances, in addition to their wide range of biomedical uses.

Source link: https://doi.org/10.1007/s42535-022-00454-8


Fluorescent Carbon Quantum Dots Functionalized by Poly L-Lysine: Efficient Material for Antibacterial, Bioimaging and Antiangiogenesis Applications

This paper illustrates the one-pot pyrolysis method's ability to produce functionalized carbon quantum dots. Poly l-lysine was the conditioning agent used in CQD synthesis. The synthesized PLLCQD has a quantum yield of 19. 3 percent and has brilliant blue fluorescence. With inhibition zone 7-20 mm, the finished PLLCQD demonstrated excellent antibacterial activity against Escherichia coli and Staphylococcus aureus. By the agar well diffusion assay method, minimum inhibitory concentration was determined by the 0. 9 to 0. 1 grams L-1. Many stimulators and inhibitors have been tested by this method, assay is a safe in vivo model to investigate angiogenesis also. PLLCQD's higher antibacterial sensitivity is shown in this study over non-functionalized CQD. By fluorescence microscopy, PLLCQD was successfully employed in bio-imaging of the bacterial cell. In the CAM model, PLLCQD had cytotoxic effects on endothelial cells and stopped blood vessel formation.

Source link: https://doi.org/10.1007/s10895-022-02977-4


Polyethylene glycol derived carbon quantum dots nanofluids: An excellent lubricant for diamond-like carbon film/bearing steel contact

Dots were ca. The polyethylene glycol molecules on sliding surfaces of polyethylene glycol molecules in nanofluids were particularly effective at establishing a hydroxyl-rich sliding interface by their tribochemical reactions with friction surfaces, which enhanced polyethylene glycol molecules adsorption on sliding surfaces. The above findings indicate that the polyethylene glycol-derived carbon quantum dots nanofluids would be an excellent candidate lubricant for solid-liquid synergy lubrication based on diamond-like carbon films.

Source link: https://doi.org/10.1007/s40544-021-0549-6


Nitrogen and Sulfur-Doped Carbon Quantum Dots Used as Fluorescent Probes

In the present study, carbon source and thiourea were synthesized by using hydrolyzed olive leaves as a carbon source and thiourea as a dopant, nitrogen-sulfur co-doped carbon quantum dots. Amphotericin B was found to increase the fluorescence intensity of NS-CQDs, whereas Fe quenched the fluorescence of NS-CQDs.

Source link: https://doi.org/10.1007/s10812-022-01422-5


A visual and reversible nanoprobe for rapid and on-site determination of hexavalent chromium and lysine based on dual-emission carbon quantum dots coupled with smartphone

A simple, largely instrument-based analytical approach for hexavalent chromium and lysine on-site monitoring has been established by the use of dual-emission carbon quantum dots. As a dual-mode detection device, the fluorescence and ultraviolet adsorption spectra of DECQDs may vary with hexavalent chromium concentrations. Lys can improve the chromium's fluorescence when you insert the DECQD nanoprobe and change the hue of the probe under natural light, which is most important. The on-site quantitative study revealed a linear range of 5. 3 bcM to Cr with a detection limit of 1. 6 bcM toward Cr and the differentiation of Lys variation from 1 to 75 mM with a detection threshold of 0. 3 mM. Abstract Graph Thes on-site measurement of hexavalent chromium and Lys’ on-site measurement by fluorescent and colorimetric twofold readout was developed for a simple, robust, smartphone-based analytical device with dual-emission carbon quantum dots.

Source link: https://doi.org/10.1007/s00604-022-05370-x

* 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