首页> 外文会议>3rd International Mesostructured Materials Symposium Jul 8-11, 2002 Jeju, Korea >Compositional effects of bimodal mesopore silica synthesized by a base-catalyzed ambient pressure sol-gel processing
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Compositional effects of bimodal mesopore silica synthesized by a base-catalyzed ambient pressure sol-gel processing

机译:碱催化环境压力溶胶-凝胶法合成的双峰介孔二氧化硅的组成效应

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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.
机译:研究了原硅酸四乙酯(TEOS)的浓度和TEOS /表面活性剂摩尔比对双峰介孔二氧化硅(BMS)合成的影响。已经发现,BMS二氧化硅可在很宽的组分浓度范围内合成,其次要介孔尺寸比其初次介孔尺寸更敏感,且次要介孔体积可高达其2.0倍或更多倍。与初级中孔体积一样大。双峰介孔尺寸分布的可控制性,特别是BMS二氧化硅的次要介孔尺寸,对催化非常感兴趣,因为它们极大地促进了向主要介孔的质量转移。

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