Dopant induced variations in microstructure and optical properties of CeO2 nanoparticles

Bhaskar Chandra Mohanty, Jong Won Lee, Deuk Ho Yeon, Yeon Hwa Jo, Jong Hak Kim, Yong Soo Cho

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)875-883
Number of pages9
JournalMaterials Research Bulletin
Volume46
Issue number6
DOIs
Publication statusPublished - 2011 Jun

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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