Preparation of large platy particles of Co-Al layered double hydroxides

Mihoko Kayano, Makoto Ogawa*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


Cobalt (II) and Al (III) layered double hydroxides were precipitated from homogeneous solutions using urea hydrolysis under hydrothermal conditions. The particle sizes were controlled successfully by changing the reaction temperature and period. It was found that larger particles formed by reactions at lower temperatures over longer reaction periods because the slow urea hydrolysis at lower temperatures suppresses the formation of nuclei in the solution. When the reaction was conducted at 60°C for 100 days, particles >40 μm wide were obtained.

Original languageEnglish
Pages (from-to)382-389
Number of pages8
JournalClays and Clay Minerals
Issue number3
Publication statusPublished - 2006 Jun


  • Hydrothermal synthesis
  • Layered-double hydroxides
  • Particle-size distribution
  • Urea hydrolysis

ASJC Scopus subject areas

  • Soil Science
  • Earth and Planetary Sciences (miscellaneous)
  • Geochemistry and Petrology
  • Water Science and Technology


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