Compositional effects of bimodal mesopore silica synthesized by a base-catalyzed ambient pressure sol-gel processing

被引：0
|
作者：
Wang, XZ [1 ]
Li, WH
Dou, T
Zhong, B
机构：
[1] Taiyuan Univ Technol, Inst Special Chem, Taiyuan 030024, Peoples R China
[2] Chinese Acad Sci, State Key Lab Coal Convers, Inst Coal Chem, Taiyuan 030001, Peoples R China
来源：
NANOTECHNOLOGY IN MESOSTRUCTURED MATERIALS | 2003年 / 146卷
关键词：
D O I：
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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 effects of tetraethylorthosilicate (TEOS) concentration and TEOS/surfactant molar ratio on the synthesis of bimodal mesopore silica (BMS) were studied. It was found that the BMS silica can be synthesized in a wide range of component concentration and its secondary mesopore size is more sensitive to the change of precursor concentration than its primary mesopore size and the secondary mesopore volumes can be up to 2.0 or more times as large as the primary mesopore volumes. The controllability of the bimodal mesopore size distributions, in particular the secondary mesopore size of BMS silica is of great interest to catalysis because they greatly facilitate mass transport to the primary mesopore.
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页码：255 / 258
页数：4
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