Hydrothermal synthesis of MCM-41 using different ratios of colloidal and soluble silica

被引：29

作者：

Amama, PB ^{[1
]}

Lim, S ^{[1
]}

Ciuparu, D ^{[1
]}

Pfefferle, L ^{[1
]}

Haller, GL ^{[1
]}

机构：

[1] Yale Univ, Dept Chem Engn, New Haven, CT 06520 USA

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2005年 / 81卷 / 1-3期

关键词：

MCM-41; hydrothermal synthesis; silica source; physicochemical properties; structural integrity;

D O I：

10.1016/j.micromeso.2005.02.001

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The influence of different ratios of colloidal (Cab-O-Sil, HiSil-915 and sodium silicate) and soluble (tetramethylammonium silicate) silica on the physicochemical properties (surface area, porosity, degree of structural order, thermal stability, density of free silanol group) of MCM-41 has been investigated. MCM-41 materials synthesized hydrothermally have been characterized by XRD, N-2 physisorption, and IR spectroscopy. The results show that colloidal silica (HiSil-915 or Cab-O-Sil) to soluble silica ratio corresponding to 80:20 favors the formation of MCM-41 material with higher degree of structural order and uniformity of mesopores than those synthesized from the conventional ratios (similar to 70:30). Also, a new approach for tailoring the pore diameter within a modest range (similar to 20-30 angstrom) and controlling the other properties (surface area, porosity, and pore wall thickness) of MCM-41 has been demonstrated in this study. MCM-41 materials synthesized from Cab-O-Sil have thicker pore walls (15-20 angstrom) and show better thermal stability than when HiSil-915 is used. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：191 / 200

页数：10

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