Solid state studies on cobalt and COPPER TUNGSTATE (cas 13587-35-4)s nano materials

Add time:08/24/2019    Source:sciencedirect.com

The cobalt and copper tungstates of the composition Co1−xCuxWO4 (where x = 0.0, 0.3, 0.5, 0.7 and 1.0) were synthesized by co-precipitation method. The compounds were characterized by Thermogravimetric Differential Scanning Calorimeter, X-ray powder diffraction, Infrared spectroscopy, Scanning electron microscopy (SEM), Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) techniques. The Rietveld refinements of X-ray powder diffraction data for the composition Cu0.5Co0.5WO4 reveal the triclinic structure with Pī symmetry. The SEM and TEM studies of the compounds show average particle size in the range of 30–50 nm. The XPS studies confirmed the 2+ oxidation state of the Co and Cu, whereas W exists in 6+ state. The Diffuse reflectance Ultraviolet–visible spectroscopy illustrates band gaps of the compounds ranging from 2.95 to 2.79 eV. The CoWO4 shows promising photoluminescence result exhibiting strong emission intensity at 468 nm.

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