OPTICAL, STRUCTURAL AND MORPHOLOGICAL CHARACTERIZATION OF CADMIUM ION DOPED WO3 NANOPARTICLES

Abstract

Tungsten trioxide (WO3) has been demonstrated to possess visible light photoactivity and presents a means of overcoming the UV-light dependence of photocatalysts, such as titanium dioxide. In this study, Cadmium ion doped WO3 nanoparticles were successfully prepared by chemical Co-precipitation method. Cadmium chloride and sodium tungstate solutions were used as precursors. The crystalline structure and optical properties of Cd ion doped WO3 nanoparticles were characterized by UV, XRD, FESEM, EDAX and PL spectroscopic techniques. The morphological studies of the Cd ion doped WO3 nanoparticles revealed crystal like morphology. The energy dispersive analysis confirmed the presence of Cd ion in the doped WO3 lattice. From UV-Visible spectra of WO3, Cd ion doped WO3 nanoparticles exhibited absorption at 310 nm and 320 nm. The XRD spectrum showed diffraction peaks corresponding to the crystal planes of crystalline tungsten oxide. Using Debye scherrer formula, the size of the undoped and Cd ion doped tungsten oxide nanoparticles were also calculated. The optical properties of the prepared nanoparticles were studied by PL spectroscopy.