Low-temperature synthesis of phase-pure 0D-1D BaTiO3 nanostructures using H2Ti3O7 templates

Duk Kyu Lee, In Sun Cho, SangWook Lee, Dong Hoe Kim, Hyun Woo Shim, Dong-Wan Kim, Kug Sun Hong

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

One-dimensional (1D) barium titanate (BaTiO3) nanowires, which were uniformly covered with 0D BaTiO3 nanocrystals, were synthesized by using a simple solvothermal reaction of protonated trititanate (H 2Ti3O7) nanowires with barium hydroxide octahydrate [Ba(OH)2·8H2O] at 80 ° C in ethanol/ water mixed solvent systems. The compositions of the mixed solvents - the volume ratio of ethanol to deionized water - was a key controlling parameter in order to determine the phase formation and primary particle size of the 0D BaTiO3 nanocrystals. Single-phase cubic perovskite BaTiO3 started to form at 80 ° C in a mixed solvent containing more than approximately 60% by volume of ethanol. Field-emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM) analysis revealed that the as-prepared BaTiO3 retained its wire-shaped morphology with nanocrystals on the surface. Furthermore, the synthetic mechanism of the 0D-1D BaTiO3 nanostructures was demonstrated in view of the dielectric tuning of the mixed solvent and the similarities between the crystal structures of BaTiO3 and H 2Ti3O7.

Original languageEnglish
Pages (from-to)1343-1347
Number of pages5
JournalEuropean Journal of Inorganic Chemistry
Issue number9
DOIs
Publication statusPublished - 2010 Mar 19
Externally publishedYes

Keywords

  • Barium
  • Nanostructures
  • Perovskite phases
  • Solvent effects
  • Template synthesis
  • Titanates

ASJC Scopus subject areas

  • Inorganic Chemistry

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