Magnesium Hydroxide Dehydroxylation: In Situ Nanoscale Observations of Lamellar Nucleation and Growth

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• 作者：Michael J. McKelvy ; Renu Sharma ; Andrew V. G. Chizmeshya ; R. W. Carpenter ; and Ken Streib
• 刊名：Chemistry of Materials
• 出版年：2001
• 出版时间：March 2001
• 年：2001
• 卷：13
• 期：3
• 页码：921 - 926
• 全文大小：265K
• 年卷期：v.13,no.3(March 2001)
• ISSN：1520-5002

文摘

Lamellar dehydroxylation mechanisms are important in understanding highly reactivenanocrystal oxide formation as well as a variety of applied lamellar hydroxide reactionprocesses. These mechanisms have been observed for the first time via in situ nanoscaleimaging for the prototype lamellar hydroxide: Mg(OH)₂. Environmental-cell, dynamic high-resolution transmission electron microscopy was combined with advanced computationalmodeling in discovering that lamellar nucleation and growth processes govern dehydroxylation. The host lamella can guide the formation of a solid solution series of lamellaroxyhydroxide intermediates en route to oxide formation. This investigation opens the doorto a deeper, atomic-level understanding of lamellar dehydroxylation reaction processes,nanocrystal oxide formation, and the range of potential new intermediate materials andthird component reaction pathways they can provide.