Synthesis and Study of the Effect of Ba2+ Cations Substitution with Sr2+ Cations on Structural and Optical Properties of Ba2−xSrxZnWO6 Double Perovskite Oxides (x = 0.00, 0.25, 0.50, 0.75, 1.00)

Abstract

The effect of Sr2+ substitution on the morphology, crystal structure, and optical properties of double perovskite oxide Ba2−xSrxZnWO6 (x = 0.00, 0.25, 0.50, 0.75, 1.00) were investigated. Scanning electronic microscopy demonstrated that all samples have similar microstructure morphology but differ in the range of grain sizes. X-ray diffraction measurements indicated that these materials crystallize in a (Fm-3m) cubic crystal structure, and also confirmed the tolerance factor. Rietveld analysis revealed that the lattice parameter decreased from 8.11834 to 8.039361 Å when the substitution of Ba2+ with Sr2+ cations increased from zero to 100%. Fourier transform infrared (FTIR) and Raman spectroscopies displayed a symmetric stretching vibration of WO6 octahedra at 825 cm−1, and an anti-symmetric stretching mode of WO6 was observed by FTIR at 620 cm−1. A strong peak at 420 cm−1 was also observed in the Raman spectra and is due to the W–O–W bending vibration modes. UV-Vis diffuse reflectance spectroscopy was carried out for the series, and the band gap energy decreased from 3.27 eV for Ba2ZnWO6 to 3.02 and 3.06 eV for Ba1.75Sr0.25ZnWO6 and Ba1.5Sr0.5ZnWO6, respectively. The excitation and emission photoluminescence properties were investigated at room temperature.

Luminescence Properties of Rare Earth–Doped Cubic Double Perovskite Tungstate Ba2(1−x)(Na,RE)xZnWO6 (RE = Ce3+, Eu3+ and Dy3+) Phosphors

“…About the same time, Bugaris et al [ 38 ] reported the optical properties of crystals of cubic DP Ba 2 MgWO 6 and Ba 2 ZnWO 6 grown by a flux method, along with structural refinement. Alsabah et al [ 39 ] studied the effect of different concentrations of Sr 2+ ions on the structural and optical properties of BaZnWO 6 DP oxides. Later, Chen et al reported the PL properties of Ba 2 ZnWO 6 :Eu 3+ , Li + [ 40 ] in 2017 and Ba 2 ZnWO 6 :Sm 3+ [ 41 ] in 2018.…”

The Effect of Mg<sup>2+</sup> Substitution with Li<sup>1+</sup> on Structural and Optical Properties of Zn<sub>0.5</sub>Li<sub>2x</sub>Mg<sub>0.5-x</sub> Fe<sub>2</sub>O<sub>4</sub> Nanoparticles

“…Table 1 showed the XRD parameters of Zn 0.5 Li 2x Mg 0.5-x Fe 2 O 4 nanopowder, also it described the relation between the rated molar of lithium concentration and structure parameters of samples, that noticed the increase of lattice parameter(a) from 8.379 to 8.408 Å of a sample by increasing the molar of lithium cations, whereas Li 1+ ionic radius is less than Mg 2+ cations radii. The crystallite size of samples was calculated by Debye-Scherrer equation [15] [16].…”

“…All ferrite nanoparticles properties are dependent on the cations nature, charges and their distribution through the tetrahedral (A) and octahedral (B) sites [14]. Different preparation methods have been followed to accomplish nanoferrite particles such as solid-state reaction method [15] [16], hydrothermal method [17], sol-gel method [18], co-precipitation route [19], and Chemical combustion route [20]. The chemical co-precipitation route could be the most synthesized method for Mg, Co and Zn Nano-ferrite.…”

Characteristics of co-precipitation synthesized cobalt nanoferrites and their potential in industrial wastewater treatment

“…The Maud program was used for XRD analysis, with the Rietveld refinement method. The crystalline size (D) was calculated by Scherer's equation [33]:…”