Hydrothermally synthesized barium titanate nanostructures from K 2Ti4O9 precursors: Morphology evolution and its growth mechanism

Yang Cao, Kongjun Zhu, Qingliu Wu, Qilin Gu, Jinhao Qiu

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

A morphology-controlled synthesis of barium titanate (BaTiO3) nanostructures from nano-whiskers to nanoparticles, were prepared via a hydrothermal strategy by manipulating the alkalinity and reaction temperature. Initially, the K2Ti4O9 precursors almost remain unchanged in the temperature of 80-160 °C at 0.1 M. By increasing the alkalinity and temperature, the BaTiO3 nanostructures initially undergoes ion exchange with precursors while retaining the morphology at the self-sacrifice of K2Ti4O9 nano-whiskers, followed by the formation of BaTiO3 nano-maces. Finally, recrystallization occurs and converts into nanoparticles at 120-220 °C at 0.8 M. Also, time-dependent experiment was conducted to probe the ion exchange process. The formation mechanism involves the generation of chemical site inducing the ion exchange process and the dissolution-precipitation reaction. By investigating the synthesis and morphology evolution of one-dimensional BaTiO3 nanostructures, this work may be of great significance for fabrication of other perovskite-type MTiO3 (M = Ca, Sr, Pb).

Original languageEnglish
Pages (from-to)162-169
Number of pages8
JournalMaterials Research Bulletin
Volume57
DOIs
Publication statusPublished - 2014 Jan 1

Keywords

  • A. Layered compounds
  • B. Microstructure
  • C. Transmission electron microscopy (TEM)
  • D. Crystal structure

ASJC Scopus subject areas

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

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