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Abstract d'exposition Carbon quantum dots were synthesized by using pistachio as a precursor for the first time in aqueous media by using a hydrothermal process. CQDs had no charge on their surface, demonstrating a high degree of CQDs, according to a new high for CQDs. Between 300 to 600 nm with a quantum yield of 12%, CQDs had blue photo emission with a broad PL peak. Different heavy metal ions in water media were tested, and results indicated that the PL intensity of CQDs decreased in the presence of Co 2+ ions decreased, showing CQDs had less sensitivity than Co 2+ ions. The resulting results showed that methylene blue had faster degradation with CQDs than methylene orange and rhodamine b. The radical scavenger's results showed that electrons play the primary role in the photocatalyst process of CQDs with methylene blue under UV irradiation.
Source link: https://doi.org/10.21203/rs.3.rs-1950337/v1
About 0. 0018, which is about 68% less than a pure PI film, is about 68% lower than that of a pure PI film. While the mechanical properties and thermal properties of a PI/CQD composite film roughly remain unchanged, the dielectric loss of the PI/CQD composite film is greatly reduced. The relative movement of a PI molecular chain is hampered due to the cross-linking network that was created between CQDs and the PI molecular chain.
Source link: https://doi.org/10.1515/epoly-2022-0054
5-hydroxymethylfurfural conversion with the waste ethanol can be converted into high-energy density 5-ethoxymethylfurfural, which has been regarded as a promising way to simultaneously solve the energy crisis and environmental pollution. We show a clever architecture and construction of acidified biomass-derived carbon quantum dots (modified UiO-66-NH2) immobilized on cermasite that can convert HMF into EMF by using IR light and wasted ethanol. Within 15 minutes of IR irradiation, the temperature on the surface of the immobilized catalyst could reach as high as 139 °C. The as-prepared catalyst demonstrated excellent IR-triggered catalytic results toward EMF manufacturing, where the EMF yields and selectivity were as high as 45% and 65%, respectively, as a result. Immobilization of catalyst on cermasite not only improves catalyst recycling, but more significantly reduces catalyst loss in practical applications.
Source link: https://doi.org/10.3390/ijerph191610437
Abstract: Carbon quantum dots are a relatively new carbon allotrope. It prompted an investigation into new CQD studies into synthesis, properties CQDs, and applications. CQDs are quasispherical carbon particles with a diameter less than ten nm and crystalline sp 2 cores of graphite and quantum effects. CQDs include graphene quantum dots, and they have a structure with one or two graphene layers with diameter 10 nm, with higher crystallinity than CQDs. Despite the wide variety of biomedical uses, we would like to concentrate on antibacterial activity of pure CQDs and polymer composites.
Source link: https://doi.org/10.1007/978-3-031-04484-7_25
However, the production of a continuous flow CQD synthesis device remains difficult. The CQD PAD was set up for the analysis of honeysuckle extracts' total phenolic content. To test the CQD PAD's analytical results, a smartphone was used. The continuous flow reactor for CQD preparation could be set up in a snap with aqueous tetraethylene glycol as the solvent for the reaction. The CQD PAD is a portable, cheap, and it is intended to be used for rapid quality testing of traditional Chinese pharmaceuticals.
Source link: https://doi.org/10.3390/chemosensors10080334
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