Chitosan/polyvinyl alcohol-based nanocomposite films incorporated with L-Glu surface functionalized ZnO NPs: Physicochemical, photocatalytic, antimicrobial and antioxidant properties evaluation

Environmental Nanotechnology Monitoring & Management, Год журнала: 2023, Номер 20, С. 100861 - 100861

Опубликована: Июль 28, 2023

Язык: Английский

Biosynthesis and Characterization of Copper Nanoparticles Using a Bioflocculant Produced by a Yeast Pichia kudriavzevii Isolated from Kombucha Tea SCOBY

Applied Nano, Год журнала: 2023, Номер 4(3), С. 226 - 239

Опубликована: Авг. 11, 2023

Over recent years, the ‘green’ chemistry approach to synthesizing nanoparticles has made significant developments. Because of their unique features, have received a lot attention. The use bioflocculant promote environmentally friendly synthesis copper is described in this paper. Copper were biosynthesized using which was produced from yeast, Pichia kudriavzevii. chemical reduction used synthesize (CuNPs) as capping agent. Characterization as-synthesized conducted Fourier transform infrared (FT-IR) spectroscopy, UV-visible X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning (SEM), and energy dispersive (EDX). FT-IR spectra revealed characteristic peaks at 3267, 2956, 1656, 1059, 511 cm−1 for bioflocculant, while passivated CuNPs, 3482 (-OH), 3261, 1640, 580, 519 (Cu-O). These that functional groups such hydroxyls, amines, oxide bonds present. UV-Vis analysis showed surface plasmon resonance (SPR) an absorbance range 500–600 nm, with peak maxima 555 575 nm CuNPs. XRD pattern planes (200) (220) 2θ = 43 52°, particle size (30 nm) determined by Debye–Scherrer equation. spherical-shaped average 20 nm. EDX CuNPs presence element Cu, not present image CuNPs; indicated success biosynthesis.

Язык: Английский

Fabrication of novel magnetic ionogel catalyst for one-pot synthesis of pyranopyrazole derivatives at ambient temperature

Journal of Sol-Gel Science and Technology, Год журнала: 2023, Номер unknown

Опубликована: Сен. 21, 2023

Язык: Английский