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Synthesis and characterization of lamellar and hexagonal mesostructured aluminophosphates using alkyltrimethylammonium cations as structure-directing agents

被引：101
作者：
Kimura, T
Sugahara, Y
Kuroda, K
机构：
[1] Waseda Univ, Dept Appl Chem, Shinjuku Ku, Tokyo 1698555, Japan
[2] Waseda Univ, Kagami Mem Lab Mat Sci & Technol, Shinjuku Ku, Tokyo 1690051, Japan
来源：
CHEMISTRY OF MATERIALS | 1999年 / 11卷 / 02期
关键词：
D O I：
10.1021/cm981036h
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Lamellar and hexagonal mesostructured aluminophosphates (AlPOs) were prepared and characterized. The lamellar mesostructured AlPO (APW-1) formed hydrothermally and the condensed framework was composed of alternating AlO4 and PO4 units. The hexagonal mesostructured. AlPO (APW-2) is formed by transformation of a layered precipitate composed of both aluminophosphate oligomers and alkyltrimethylammonium (ATMA) cations. Calcined APW-2 had a mesoporosity with the BET surface area of 980 m(2) gl and a pore diameter of 1.8 nm after substantial shrinkage of the framework. Lamellar APW-1 formed under most of the conditions surveyed, while hexagonal APW-2 was obtained under very restricted conditions. In this system, the charge matching in the products is the most important factor, although the assemblies of ATMA cations are essential as the structure-directing agents.
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页码：508 / 518
页数：11
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