Abstract
Nanocrystalline cerium tungstate and its 6 % dysprosium doped nanocrystals have been prepared by the chemical precipitation followed by the heat treatment at 600 °C. X-ray diffraction studies confirm the crystalline formation of the cerium tungstate phase without any secondary phases occurring due to dysprosium doping. The doping caused a small variation in the crystallite size. Transmission electron microscopic images show the agglomeration of the particles and the high-resolution transmission electron microscope images exhibit the different planes of the polycrystalline samples. Energy-dispersive X-ray spectroscopic analysis confirms the presence of elements present in the material. The characteristic vibrations due to the W-O-W and O-W-O stretching modes characteristics of tetrahedral tungstates (WO42-) are confirmed from Fourier transform infrared spectra. UV–Vis-NIR reflectance studies show high reflectance in the near-infrared region. Also, the samples show high absorption in the visible and ultraviolet regions.
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