Versatile double-templating synthesis route to silica monoliths exhibiting a multimodal hierarchical porosity

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Jan-Henrik Smått, Stephan Schunk, Mika Lindén
Publisher: AMER CHEMICAL SOC
Publication year: 2003
Journal: Chemistry of Materials
Journal acronym: CHEM MATER
Volume number: 15
Start page: 2354
End page: 2361
Number of pages: 8
ISSN: 0897-4756
eISSN: 1520-5002


Abstract

Monolithic silica exhibiting a trimodal, hierarchical pore structure has successfully been prepared via sol-gel-processing. Monolithic bodies with interconnected macropores in the micrometer range are a result of controlled phase separation and gelation kinetics, whereas textural mesopores in the 10-20 nm range originate from voids between particles. Furthermore, the particles exhibit internal mesoporosity with pore diameters in the 2-4 nm range originating from supramolecular templating by the surfactant. Poly(ethylene glycol) has been used together with alkylammonium surfactants to control the particle aggregation and internal structure, respectively. The present work sheds light on the mechanism of formation of the complex framework architectures and the application potential of the material.

Last updated on 2019-09-12 at 02:49