Formation and reaction activity of CeO2 nanoparticles of cubic structure and various shaped CeO2-TiO2 composite nanostructures

Keizo Nakagawa, Yusuke Murata, Masahiro Kishida, Motonari Adachi, Masahiko Hiro, Kenzo Susa

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

Mono-dispersed cubic CeO2 nanoparticles have been synthesized using a surfactant-assisted method with laurylamine hydrochloride and cerium alkoxide modified with acetylacetone in an aqueous solution system. The prepared cubic CeO2 nanoparticles had a highly crystallized structure at 353 K and formed rod-like structures by calcination at 673 K after freeze-drying the CeO2 gel. We discovered a clear potential to make 1D, 2D or 3D CeO2-materials with a well-controlled characteristic length and shape by assembling cubic-shaped CeO2 nanoparticle building blocks. CeO2-TiO2 composite nanostructures have also been synthesized by changing the mole ratio of cerium alkoxide/titanium alkoxides. By utilizing the redox characteristic of CeO2, CeO2 nanoparticles and CeO2-TiO2 composite nanostructures after calcination, showed reaction activity toward the oxidization of I- to I2, due to the Lewis acid sites available on the CeO2-TiO2 nanostructure. The activity of the CeO2-TiO2 composite nanostructure reached a maximum at CeBu/TIPT = 75/25, with a calcination temperature at 623 K.

Original languageEnglish
Pages (from-to)30-39
Number of pages10
JournalMaterials Chemistry and Physics
Volume104
Issue number1
DOIs
Publication statusPublished - Jul 15 2007

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

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