Journalartikel

Jahr der Veröffentlichung: 2003

Seiten: 91-101

Zeitschrift: Microporous and Mesoporous Materials

Bandnummer: 66

Heftnummer: 1

ISSN: 1387-1811

DOI Link: https://doi.org/10.1016/j.micromeso.2003.08.024

Verlag: Elsevier

Abstract: 
We present a new approach for rapid formation of mesoporous, surfactant-templated silica membranes on coarse-pore alpha-Al2O3 ceramic supports. A surfactant-silica sol is dispersed in the gas phase in the form of small droplets and delivered to the surface of the planar support by a N-2 carrier stream. Coalescence of deposited sol droplets combined with solvent evaporation-induced self-assembly of liquid crystalline mesophases results in the formation of continuous, mesostructured silica-surfactant layers covering the surface of the support. These mesostructured silica membranes are impermeable right after synthesis and exhibit N-2 permeance in the range 10(-7)-10(-6) mol m(-2) s(-1) Pa-1 after surfactant removal. SEM studies revealed the presence of relatively smooth layers of thickness similar to1 mum on the surface of the ceramic supports while SAXS and TEM investigations revealed that these membranes possess cubic-ordered mesopores of size similar to20 Angstrom, without preferential orientation with respect to the substrate. Such membranes may find application in ultrafiltration separation processes, since surfactant-templating can be used for accurate control of the pore size/distribution in the proper range for a desired separation.

Harvard-Zitierstil: Xomeritakis, G., Braunbarth, C., Smarsly, B., Liu, N., Köhn, R., Klipowicz, Z., et al. (2003) Aerosol-assisted deposition of surfactant-templated mesoporous silica membranes on porous ceramic supports, Microporous and Mesoporous Materials, 66(1), pp. 91-101. https://doi.org/10.1016/j.micromeso.2003.08.024

APA-Zitierstil: Xomeritakis, G., Braunbarth, C., Smarsly, B., Liu, N., Köhn, R., Klipowicz, Z., & Brinker, C. (2003). Aerosol-assisted deposition of surfactant-templated mesoporous silica membranes on porous ceramic supports. Microporous and Mesoporous Materials. 66(1), 91-101. https://doi.org/10.1016/j.micromeso.2003.08.024