جستجوی مقالات مرتبط با کلیدواژه « znwo4 » در نشریات گروه « شیمی »

In this study, ZnWO4:Er3+ nanocrystals were synthesized using a simple co-precipitation method. The structural properties of the prepared powders were characterized through X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FE-SEM). The synthesized nanopowders exhibited a monoclinic wolframite crystal structure. Using the Williamson-Hall method, the lattice strain and crystal size of the synthesized powders were estimated. ZWO nanopowders with a 1 at.% concentration of Er dopant showed the lowest strain and crystallite size. FE-SEM results revealed that the prepared nanoparticles have a spherical morphology with an average size of 140 nm. The FTIR analysis confirmed the presence of Zn-O, Zn-O-W, and W-O vibrations in the synthesized structure. The transmittance percentage in the doped sample changed concerning the pure one, indicating that interstitial Er3+ ions affected the number of W-O, Zn-O, and Zn-O-W bonds. The facilely synthesized Erbium-doped ZnWO4 nanocrystals showed promise for a range of practical applications.

Zinc tungstate (ZnWO4) possesses exceptional optical properties, making it a valuable material for scintillators and phosphors in radiation detection and imaging applications. Its high density and excellent light yield contribute to its effectiveness in capturing and converting ionizing radiation into detectable signals with precision. In this study, the pure (ZWO) and terbium-doped ZWO nanoparticles (ZWO: Tb) were synthesized using a simple co-precipitation method. X-ray diffraction (XRD), Fourier Transform Infrared (FTIR), and Field-Emission Scanning electron microscope (SEM) were used to characterize the crystal structure, binding vibrations, and morphology of the prepared nanopowders, respectively. The prepared nanoparticles were in a monoclinic wolframite phase with spherical, cubic, and planar (sheet-like) morphologies as well as the average particle size of 256.8 nm. Based on the FTIR results, the characteristic bands of Zn-O, Zn-O-W, and W-O bonds appeared at 428, 716, and 697 cm-1, respectively. The prepared nanopowders can be advantageous for manufacturing flexible fluorescence materials, optoelectronic devices, and detectors.