Nanocrystalline CeO2 particles doped in the range of 0-20% of Ca2+, La3+, and Zr4+ have been prepared from hydrothermal synthesis of nitrate solutions at 200 °C and the influences of the dopants on microstructure and optical properties of the nanoparticles have been investigated. The unit cell parameter is found to be modified by -0.39, +0.83 and +0.16% for doping of 20% Zr4+, La3+, and Ca 2+, respectively. For each batch prepared, nanoparticles with a narrow size distribution of 5-15 nm have been obtained. A high-resolution transmission electron microscopy investigation reveals that these particles are single crystals mostly having hexagonal, square or circular two-dimensional projections. UV-visible spectra of doped powders exhibit shift of the absorption edge and absorption peak with respect to those of the undoped CeO2 particles and has been attributed to compensation of Ce3+ and decreasing crystallite size as result of doping.
|Number of pages||9|
|Journal||Materials Research Bulletin|
|Publication status||Published - 2011 Jun|
Bibliographical noteFunding Information:
The research was supported by the Converging Research Center Program through the National Research Foundation of Korea funded by MEST , and partially, by the Human Resource Training Project for Strategic Technology funded by MKE .
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering