Temperature control in the synthesis of cubic mesoporous silica materials

被引：28

作者：

Wang, LZ ^{[1
]}

Shi, JL ^{[1
]}

Yu, J ^{[1
]}

Zhang, WH ^{[1
]}

Yan, DS ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

MATERIALS LETTERS | 2000年 / 45卷 / 05期

关键词：

MCM-48; materials; temperature; cubic;

D O I：

10.1016/S0167-577X(00)00117-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The cubic mesoporous silica MCM-48 materials have been synthesized by temperature control, and the properties of samples were investigated by using XRD, HREM and N-2 adsorption-desorption techniques. XRD results show that the mesophases synthesized at low temperature (less than or equal to 75 degrees C) have a poorly ordered hexagonal structure, while hydrothermal treatment at higher temperature (greater than or equal to 95 degrees C) led to cubic MCM-48 mesophases. The effect of temperature on different mesophases can be due to the polymerization and condensation of silicate species at different temperatures, which results in the formation of curvatured hexagonal or cubic phase. HREM and N-2 isotherms of MCM-48 materials indicates well-ordered three-dimensional meso-channels. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：273 / 278

页数：6

共 19 条

[1] Structure of MCM-48 revealed by transmission electron microscopy [J].