A detailed study of thermal, hydrothermal, and mechanical stabilities of a wide range of surfactant assembled mesoporous silicas

被引：329

作者：

Cassiers, K ^{[1
]}

Linssen, T ^{[1
]}

Mathieu, M ^{[1
]}

Benjelloun, M ^{[1
]}

Schrijnemakers, K ^{[1
]}

Van Der Voort, P ^{[1
]}

Cool, P ^{[1
]}

Vansant, EF ^{[1
]}

机构：

[1] Univ Antwerp, Dept Chem, Lab Adsorpt & Catalysis, B-2610 Antwerp, Belgium

来源：

CHEMISTRY OF MATERIALS | 2002年 / 14卷 / 05期

关键词：

D O I：

10.1021/cm0112892

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：

The thermal, hydrothermal, and mechanical stabilities of a wide range of ordered mesoporous materials, in particular, the molecular sieves MCM-41, MCM-48, HMS, FSM-16, KIT-1, PCH, and SBA-15, have been studied in detail using X-ray diffraction (XRD) and nitrogen sorption. The thermal stability was found to be strongly related to the wall thickness and the silica precursor used during synthesis, and the following stability trend was observed: MCM-41 (fumed silica), MCM-48 (fumed silica), KIT-1 (colloid silica) > SBA-15 (TEOS) > FSM-16 (layered silicate), PCH (layered silicate) > MCM-41 (TEOS), MCM-48 (TEOS), HMS (TEOS). The hydrothermal stability is influenced by the wall thickness and the polymerization degree and decreases according to the following trend: KIT-1 > SBA-15 > MCM-48 (fumed silica and TEOS), PCH > FSM-16, MCM-41 (fumed silica and TEOS), HMS. The mechanical stability is little influenced by the nature of the mesoporous molecular sieves. All materials collapsed at a maximum pelletizing pressure of 450 MPa.

引用

页码：2317 / 2324

页数：8

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