Comparative study on pore structures of mesoporous ZSM-5 from resorcinol-formaldehyde aerogel and carbon aerogel templating.
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.
Tao
Yousheng
Y
Department of Chemistry, Faculty of Science, Chiba University, Chiba 263, Japan.
Hattori
Yoshiyuki
Y
Matumoto
Akihiko
A
Kanoh
Hirofumi
H
Kaneko
Katsumi
K
D002244:Carbon / Q000737:chemistry*; D005557:Formaldehyde / Q000737:chemistry*; D005782:Gels / Q000737:chemistry; D010316:Particle Size; D016062:Porosity; D012118:Resorcinols / Q000737:chemistry*; D013499:Surface Properties; D017641:Zeolites / Q000737:chemistry*
D005782:Gels; D012118:Resorcinols; D017641:Zeolites; D005557:Formaldehyde; D002244:Carbon; C031389:resorcinol