Aqueous route to size-controlled and doped organophilic ceria nanocrystals

Takaaki Taniguchi, Tomoaki Watanabe, Naonori Sakamoto, Nobuhiro Matsushita, Masahiro Yoshimura

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

This paper presents an aqueous route to size-controlled and doped CeO 2 nanoparticles using the Ce-oleate complex as a chemically modified precursor. In this synthesis, a hydrolytic condensation of Ce-oleate complex by aqueous ammonia solution at room temperature leads to 2.2 nm sized CeO 2 nanocrystals. These products are dispersible in nonpolar solvents owing to the hydrophobic nature of the surface oleate ligand. Moreover, the size of the nanocrystals is controllable up to 5.2 nm by subsequent hydrothermal treatment at 200 °C. The proposed method can be extended for the synthesis of rare earth-doped CeO2 nanocrystals as well. The Gd3+ doped CeO2 nanocrystals synthesized by the proposed method exhibit a spherical shape (size ∼ 3.2 nm) and have a designed chemical composition by energy dispersive X-ray analysis, X-ray diffraction, Raman scattering, and transmission electron microscopy.

Original languageEnglish
Pages (from-to)3725-3730
Number of pages6
JournalCrystal Growth and Design
Volume8
Issue number10
DOIs
Publication statusPublished - 2008 Oct 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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