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Due to their outstanding environmental use, Green synthesis of scalable, high-quality, fluorescent carbon quantum dots from natural biomass remains popular. CQDs are an emerging class of zero-dimensional carbon nanomaterials that have piqued increasing interest lately because of their excellent optical stability, biocompatibility, nontoxicity, uniform particle size, high phototability, low-cost synthesis, and highly tunable photoluminescence. This review article will explore the physicochemical characteristics of CQDs methods used in the manufacture of CQDs and their stability during their use in wastewater treatment and biomedical fields.
Source link: https://europepmc.org/article/MED/35461844
Carbon quantum dots derived from broccoli natural biomass as a carbon source were made herein by a simple hydrothermal process and demonstrated excellent PDT capability as a universal photodynamic agent tested in Caenorhabditis elegans models. Thanks to adequate light irradiation, which was tested by measuring the egl-1 -fold induction in hus-1 and cep-1 mutants that have a lack of function in DNA damage response genes involved in DNA damage response genes such as hus-1 and cep-1, p53 explains. These genes were indispensable in DNA damage-induced germline apoptosis in the absence of germline apoptosis in the loss of function mutants egl-1, hus-1, and cep-1.
Source link: https://europepmc.org/article/MED/35445670
By a simple and effective hydrothermal method, bright yellow-green carbon quantum dots were successfully synthesized. Moreover, the fluorescence of YGCDs could be selectively quenched by folic acid molecules, and F/F 0's relative fluorescence intensities were perfectly defined in a line decay curve versus FA's concentration range from 2. 0 -8 mol/l to 1. 0 -5 mol/l.
Source link: https://europepmc.org/article/MED/35233966
Here, the high fluorescent silicon-doped carbon quantum dots were prepared by a fast and one-pot hydrothermal assay using 3-aminopropyltrimethoxysilane as the carbon and silicon source. The fabricated Si-CQDs have unique up-conversion fluorescence in comparison to other Si-CQDs that have been reported. In comparison, the linear range of up-conversion fluorescence detection for BH is 0. 33 mol/L with a limit of detection of 50 nmol/L, and the linear range of up-conversion fluorescence assay for BH is 0-25. 0 mol/L.
Source link: https://europepmc.org/article/MED/35313173
In this work, an eco-friendly, cost-effective, and convenient method for synthesizing biocompatible fluorescent quantum dots from the leaf extract of the medicinal plant Calotropis gigantea, commonly known as crown flower, is shown. The size distribution of the as-synthesized CQDs varied from 2. 7 to 10. 4 nm, with a substantial number of sp 2 and sp 3 carbon groups confirmed by nuclear magnetic resonance analysis. In this regard, as-synthesized CQDs have demonstrated exceptional fluorescent staining capabilities in this study and can be used as a useful probe for optical and bioimaging of bacteria, fungi, and plant cells.
Source link: https://europepmc.org/article/MED/35262854
Carbon quantum dots are a popular eco-friendly fluorescence coating, suitable for a variety of ecological testing methods. C-NH 3 - We establish uniform microwave synthesis of the group of carbon quantum dots with specific functionalization of ethylenediamine, diethylenetriamine, and three forms of Trilon with chelate claws herein. In high metal cation concentrations, CQD-En and CQD-Dien demonstrated linear fluorescence quenching. Due to the roughness on CQDs' surface, the claws from Trilon A, Trilon B, and C were effectively removed the copper and nickel cations from the solution.
Source link: https://europepmc.org/article/MED/35269294
The complete utilization of waste rice noodle without secondary contamination can be achieved by using WRN as raw material. Under visible light irradiation, the CQDs/TiO 2 composite based on WRN showed a high photocatalytic degradation effect on various water-soluble dyes such as methylene blue, malachite green, methyl violet, basic fuchsin, and rhodamine B, which gave better photocatalytic results than commercial TiO 2, on the other hand, as demonstrated by increased photocatalytic yield under visible light irradiation Providing efficient electron-hole pair separation and allowing more photogenerated electrons to reduce O 2 and more photogenerated holes to oxidize H 2 O or OH, which could lead to improved reaction in producing O 2 - and OH radicals as well as improved photocatalytic activity.
Source link: https://europepmc.org/article/MED/35159817
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