Crystal growth of Ce2O(CO3)2·H 2O in aqueous solutions: Film formation and samarium doping

Masashi Oikawa, Shinobu Fujihara

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


Crystalline cerium oxide carbonate hydrate (Ce2O(CO 3)2·H2O) was grown in aqueous solutions at a low temperature of 80 °C under ambient pressure. When cerium nitrate was used as a starting material, large Ce2O(CO3) 2·H2O particles were precipitated through homogeneous nucleation and subsequent fast crystal growth. In contrast, the usage of cerium chloride was found to promote the preferential precipitation of Ce2O(CO3)2·H2O on foreign substrates through heterogeneous nucleation and slow crystal growth. This phenomenon was applied to a chemical bath deposition of Ce2O(CO 3)2·H2O films. Immersion of glass substrates in the solution at 80 °C for typically 24 h resulted in formation of solid films with a unique morphology like a micrometer-scale brush. It was also found that samarium could be incorporated into Ce2O(CO 3)2·H2O during the crystal growth in the solutions, as evidenced by characteristic photoluminescence of Sm3+ in heating products of CeO2. These results suggest that rare-earth oxide carbonate hydrates with a variety of compositions and morphologies can be synthesized from the aqueous solutions.

Original languageEnglish
Pages (from-to)2036-2041
Number of pages6
JournalJournal of Solid State Chemistry
Issue number6
Publication statusPublished - 2005 Jun


  • Cerium dioxide
  • Cerium oxide carbonate hydrate
  • Chemical bath deposition
  • Crystal growth
  • Photoluminescence
  • Solid films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry


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