间苯二酚-甲醛气凝胶和碳气凝胶模板法制备的介孔ZSM-5孔结构的比较研究

Comparative study on pore structures of mesoporous ZSM-5 from resorcinol-formaldehyde aerogel and carbon aerogel templating.

作者信息

Tao Yousheng, Hattori Yoshiyuki, Matumoto Akihiko, Kanoh Hirofumi, Kaneko Katsumi

机构信息

Department of Chemistry, Faculty of Science, Chiba University, Chiba 263, Japan.

出版信息

J Phys Chem B. 2005 Jan 13;109(1):194-9. doi: 10.1021/jp0464167.

DOI:10.1021/jp0464167

PMID:16851004

Abstract

Resorcinol-formaldehyde aerogels and carbon aerogels of different mesoporosities have been used as templates for preparing bimodal zeolites of mesopores. Samples were thoroughly characterized with X-ray diffraction, field emission scanning electron microscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy, N(2) adsorption at 77 K, as well as FT-IR spectroscopy and (29)Si nuclear magnetic resonance spectroscopy. The mesoporous ZSM-5 zeolites have additional mesopores of 9-25 nm in widths and 0.07-0.2 cm(3)/g in volumes, besides their perfect inherent micropores. Experimental results show the mesoporous systems of the finally obtained zeolites can be influenced by proper preparation of resorcinol-formaldehyde aerogels and carbon aerogels through solution chemistry. Consequently, zeolites of tunable mesoporosities can be prepared with this unique methodology.

摘要

不同介孔率的间苯二酚-甲醛气凝胶和碳气凝胶已被用作制备介孔双峰沸石的模板。通过X射线衍射、场发射扫描电子显微镜、热重分析、X射线光电子能谱、77K下的N(2)吸附以及傅里叶变换红外光谱和(29)Si核磁共振光谱对样品进行了全面表征。除了其完美的固有微孔外，介孔ZSM-5沸石还具有宽度为9-25nm、体积为0.07-0.2cm(3)/g的额外介孔。实验结果表明，通过溶液化学适当制备间苯二酚-甲醛气凝胶和碳气凝胶，可以影响最终获得的沸石的介孔系统。因此，采用这种独特的方法可以制备出介孔率可调的沸石。