Mechanism of pore formation and structural characterization for mesoporous Mg-Al composite oxides

Mg-Al layered double hydroxides (LDH) with different particle sizes were prepared using different aging times at high supersaturation by a new method developed in our laboratory. The key features of this method are a very rapid mixing and nucleation process followed by a separate aging process. By c...

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Bibliographic Details
Published inScience China. Chemistry Vol. 45; no. 1; pp. 37 - 45
Main Author ZHAO, Yun
Format Journal Article
LanguageEnglish
Published Heidelberg Springer Nature B.V 2002
Subjects
Aluminum
Crystal structure
Hydroxides
Magnesium
Nucleation
Oxides
Pore formation
Pore size distribution
Structural analysis
Supersaturation
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Summary:Mg-Al layered double hydroxides (LDH) with different particle sizes were prepared using different aging times at high supersaturation by a new method developed in our laboratory. The key features of this method are a very rapid mixing and nucleation process followed by a separate aging process. By calcination of LDH at 500°C, mesoporous Mg-Al composite oxides with an extremely narrow pore size distribution were produced. The crystal structure of the Mg-Al composite oxides was a multiphasic one consisting of MgO-like crystals and a layered material.
ISSN:1006-9291
1674-7291
1869-1870
DOI:10.1360/02yb9006