期刊
CLAYS AND CLAY MINERALS
卷 54, 期 3, 页码 382-389出版社
CLAY MINERALS SOCIETY
DOI: 10.1346/CCMN.2006.0540309
关键词
hydrothermal synthesis; layered double hydroxides; particle-size distribution; urea hydrolysis
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 degrees C for 100 days, particles >40 mu m wide were obtained.
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