大孔径高比表面积介孔硅泡沫的制备和表征  

Preparation and Characterization of Mesocelluar Silia Foam with Large Pore Size and High Surface Area

作　　者：韦良[1] 赵燕熹[1] 向勇[1] 王磊磊[1] 聂秋宇[1] 韩杵岑[1] 李金林[1] 

机构地区：[1]中南民族大学催化材料科学湖北省暨国家民委-教育部共建重点实验室,武汉430074

出　　处：《武汉理工大学学报》2013年第6期34-38,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(21073238;21203253);国家重点基础研究发展计划("973"项目)(2011CB211704)

摘　　要：以P123作为模板剂,正硅酸乙酯为硅源,苯为微乳剂,采用溶胶-凝胶水热合成法制备了大孔径高比表面积介孔硅泡沫材料,采用小角X-射线衍射、透射电镜、扫描电镜以及N2物理吸附等表征手段进行表征,考察了苯的加入量对介孔硅泡沫孔结构的影响。结果表明,苯的引入可以使有序介孔硅的孔结构从SBA-15的二维六方形向介孔硅泡沫的三维泡沫状结构转变,加大苯的含量可以增大介孔硅泡沫的孔径和孔容。当苯与P123的质量比为2.0时为最佳值,此时得到的介孔硅泡沫材料泡沫状结构最规整、比表面积高且孔径孔容较大,其中表面积可达641.3cm2/g,球形孔孔径可以达到43.8nm,孔容2.41cm3/g,过量苯会导致三维泡沫状结构的破坏。Mesocelluar silia foam with large pore size and surface area was synthesized by sol-gel method using P17.3 as the template, tetraethyl orthosilicate as the sourse of silia and benzene as microemulsion. X-ray diffraction , transmission electron microscopy, scanning electron microscopy and N2 physisorption were used to investigate the effect of benzene adding on the structure of mesocelluar silia foam. The result showed that the structure of mesoporous silia transformed hexagonal to mesocellular foam phase after adding benzene. The pore size and volume would increase when the benzene increased. The most suitable mass ratio between benzene and P123 was 2. 0, while the mesocelluar silia foam had regular structure,high suface area（641.3 cm2/g）,large pore size（43. 8 nm） and volume（2. 41 cm3/g）. However, the 3-D structure of mesocelluar silia foam would be destroyed when the content of benzene was excessive.

关 键 词：介孔硅泡沫 合成 苯 SBA-15 

分 类 号：O611.62[理学—无机化学]