Synthesis and Characterization of Zn-doped CuWO 4Nanoparticles and Their Opto-structural Properties

Abstract

CuWO₄ and Zn-doped CuWO₄ nanoparticles were prepared by a solid-state reaction method. The XRD study confirms the triclinic crystal structure for both samples and the peak shift is noticed for Zn-doped CuWO4 particles with high crystallinity. The FTIR spectra show metal oxide vibration which arose from the CuWO₄ and Zn-doped CuWO₄ particles. The optical absorption spectra exhibit strong absorption in the visible region and the band gap of Zn-doped CuWO₄ is found to be increased to 2.44 eV comparedto that of CuWO₄
(2.36 eV), which is due to the elevated conduction band levels after Zndoping. The SEM images of both CuWO4 and Zn-doped CuWO₄ nanoparticles show densely aggregated particles.

Keywords: Copper tungstate, Zn-doped CuWO₄, Absorption, Nanoparticles.