Abstract
In this work, alpha-copper tungstate (α-CuWO4) crystals were prepared by polymeric precursor method. The structural and optical data were performed by X-ray diffraction (XRD), Rietveld refinement, Fourier-transform infrared (FTIR), and ultraviolet–visible (UV–Vis) diffuse reflectance spectroscopies. Moreover, their colorimetric and supercapacitor properties were investigated. Pristine α-CuWO4 crystals present a triclinic structure, symmetric and antisymmetric stretch vibrations in the O–Cu–O and O–W–O bonds corresponding to IR-active modes and an optical bandgap value of 2.24 eV. Colorimetric results showed that the α-CuWO4 crystals exhibit a brown color to be employed in pigments coating floors. The α-CuWO4 crystals present a specific capacitance of 275.68F/g at 5 mV/s to be applied as a stable anodic electrode. These results suggest that α-CuWO4 is an excellent candidate as an electrode for energy storage devices in the next generation of batteries.
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