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Preparation of Large Platy Particles of Co-Al Layered Double Hydroxides

Published online by Cambridge University Press:  01 January 2024

Mihoko Kayano  and
Makoto Ogawa
Mihoko Kayano
Affiliation:
Graduate School of Science and Engineering, Waseda University, Nishiwaseda 1-6-1, Shinjuku-ku, Tokyo 169-8050, Japan
Makoto Ogawa*
Affiliation:
Graduate School of Science and Engineering, Waseda University, Nishiwaseda 1-6-1, Shinjuku-ku, Tokyo 169-8050, Japan Department of Earth Sciences, Waseda University, Nishiwaseda 1-6-1, Shinjuku-ku, Tokyo 169-8050, Japan
*
*E-mail address of corresponding author: [email protected]
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Abstract

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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.

Keywords

Hydrothermal SynthesisLayered Double HydroxidesParticle-size DistributionUrea Hydrolysis
Type
Research Article
Information
Clays and Clay Minerals , Volume 54 , Issue 3 , June 2006 , pp. 382 - 389
Copyright
Copyright © 2006, The Clay Minerals Society

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