Synthesis and characterization of metal tungstates by novel solid-state metathetic approach

Presence of excited electronic state in CaWO4 crystals provoked by a tetrahedral distortion: An experimental and theoretical investigation

“…Disorders in surfaces and interfaces commonly occur in materials synthesized by the microwaveassisted hydrothermal method and created additional levels above the valence band and below the conduction band, decreasing the bandgap. 6,108,119,120 In this case, the decrease of the bandgap, as showed by the UV-vis measurements, leads to the dislocation of the natural scheelite green emission to blue emission. Therefore, an analysis of site-and orbital-resolved DOS shows a significant dependence of the W CB DOS's on the local coordinations.…”

Visible Light Photocatalytic Degradation of Methylene Blue and Malachite Green Dyes with BaWO4-Go Nano Composite

“…The phase purity of the as-synthesized materials was confirmed by representative XRD analysis. As shown in Fig-2 [28,29] is shown in Fig-3. FTIR spectrum of BaWO4 nano crystals synthesized in aqueous medium have broad band at 3448.75 cm -1 and at 1632.52 cm -1 are due to the vibrations of adsorbed water molecules on the sample.…”

“…However, too much catalyst dispersed in the system will possibly increase light scattering and decrease light penetration [28], resulting in the reduction of degradation efficiency of MG&MB in a system with excessive photocatalysts. 10% and 20% GO-nano BaWO4 are having similar percentage of degradation composite performs the best in removing the organic pollutants in wastewater under visible light irradiation, shown in Table 2.…”

Preparation of Zinc Tungstate (ZnWO4) Particles by Solvo-hydrothermal Technique and their Application as Support for Inulinase Immobilization

“…ZnWO 4 particles have been synthesized by various routes such as polymerized complex method 22 , microwave assisted technique 23 , hydrothermal 24 , ligand-assisted hydrothermal 25 , template-free hydrothermal 26 , solid-state reaction 27 , polyol-mediated synthesis 28 , solid-state metathetic approach 29 , mechanochemical synthesis 30 , sol-gel 31 , calcining co-precipitated precursor 32 and combustion method 33 , electrodeposition 34 and high direct voltage electrospinning process 35 . In this work, ZnWO 4 particles were prepared by the one-step solvo/hydrothermal method due be simple, easy, mild reaction temperature, and environmentally friendly, because use not surfactant.…”