Direct hydrothermal synthesis of size-controlled Co3O4 Nanocubes under Highly Condensed Conditions

Kiyoshi Kanie, Yusuke Tsujikawa, Atsushi Muramatsu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Cobalt oxide (Co3O4) nanocubes with high crystallinity and a narrow size distribution have been synthesized in one pot process under highly condensed hydrothermal reactions using cobalt(II) nitrate (Co(NO3)2) and sodium hydroxide or tetramethylammonium hydroxide. The particle morphology was controlled to a cubic shape by change in the initial pH. The particle mean diameter was also gradually controlled by the change in the initial pH in the range from 18 nm to 66 nm. Co(OH)2 hexagonal thin platelet particles were obtained as the predominant product when CoSO4, CoCl2, and Co(CH3COO)2 were used as the Co-source. The result indicated that oxidation ability of nitrate anions played an important role to obtain the Co3O4 nanocubes in the one pot process.

Original languageEnglish
Pages (from-to)1014-1019
Number of pages6
JournalMaterials Transactions
Issue number7
Publication statusPublished - 2017


  • Cobalt oxide
  • Hydrothermal synthesis
  • Nanocube
  • Nanoparticle
  • Size control
  • Tetramethylammonium hydroxide

ASJC Scopus subject areas

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


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