Preparation and characterization of microporous SiO{sub 2}-ZrO{sub 2} pillared montmorillonite
- Nanospace Co. Ltd., Business Incubator, Korea Institute of Ceramic Engineering and Technology, 233-5 Gasan-dong Guemcheon-Gu, Seoul 153-801 (Korea, Republic of)
- Department of Applied Chemistry, Faculty of Engineering, Hiroshima University, Higashi-Hiroshima 739 (Japan)
SiO{sub 2}-ZrO{sub 2} pillared montmorillonite (SZM) was prepared by the reaction of Na-montmorillonite with colloidal silica-zirconia particles which were prepared by depositing zirconium hydroxy cations on silica particles. By pillaring with the colloidal particles, the basal spacing of montmorillonite was expanded to ca. 45 A and the calcined SZM samples showed large specific surface areas up to 320 m{sup 2}/g at 400 deg. C. In spite of large interlayer separation, adsorption results indicated the presence of micropores generated between the colloidal particles. The microporous structure was maintained at least up to 600 deg. C and exhibited specific shape selectivity for the adsorption of large organic molecules, especially between toluene and mesitylene. According to the temperature-programmed-desorption (TPD) spectra of ammonia, the calcined SZM showed weakly acidic sites.
- OSTI ID:
- 20784967
- Journal Information:
- Journal of Solid State Chemistry, Vol. 179, Issue 4; Other Information: DOI: 10.1016/j.jssc.2006.01.013; PII: S0022-4596(06)00009-0; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
Similar Records
Preparation and characterization of SiO{sub 2}/TiO{sub 2} composite microspheres with microporous SiO{sub 2} core/mesoporous TiO{sub 2} shell
Facile fabrication of SiO{sub 2}/Al{sub 2}O{sub 3} composite microspheres with a simple electrostatic attraction strategy