DIRECT TEM IMAGING OF TUBULES IN CALCINED MCM-41 TYPE MESOPOROUS MATERIALS

被引：122

作者：

CHENITE, A

LEPAGE, Y

SAYARI, A

机构：

[1] UNIV LAVAL,DEPT CHEM ENGN,ST FOY,PQ G1K 7P4,CANADA

[2] UNIV LAVAL,CERPIC,ST FOY,PQ G1K 7P4,CANADA

来源：

CHEMISTRY OF MATERIALS | 1995年 / 7卷 / 05期

关键词：

D O I：

10.1021/cm00053a031

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：

Calcined MCM-41 type mesoporous samples have been characterized by transmission electron microscopy(TEM). Samples are not crystalline at the atomic level. The existence of an array of long silicate tubules packed in honeycomb fashion, nearly always bent and curved has been evidenced. The formation of such a silicate architecture through a liquid-crystal template mechanism had been hypothesized before. Equidistant parallel lines observed in this study are shown to be related to the hexagonal repeat between tubules: the honeycomb array is sufficiently regular to give fringes in projection under proper orientation of the specimen. The existence of a hypothetical lamellar phase in the calcined material is not confirmed by our observations. Samples with different compositions all had the same general architecture.

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页码：1015 / 1019

页数：5

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