Transport properties of hierarchical micro–mesoporous materials12. (13th January 2016)

• Record Type: Journal Article
• Authors: Schneider, Daniel; Mehlhorn, Dirk; Zeigermann, Philipp; Kärger, Jörg; Valiullin, Rustem
• Is Part Of: Chemical Society reviews. Volume 45:Number 12(2016:Jun.)
• Page Start: 3439
• Page End: 3467
• Publication Date: 2016-01-13
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c5cs00715a
• Languages: English
• ISSNs: 0306-0012

Abstract

Abstract : This work provides an overview of different experimental techniques of diffusion measurements in porous materials and discusses transport properties of several classes of hierarchically organized micro-mesoporous materials. Abstract : Adding mesopore networks in microporous materials using the principles of hierarchical structure design is recognized as a promising route for eliminating their transport limitations and, therefore, for improving their value in technological applications. Depending on the routes of physico-chemical procedures or post-synthesis treatments used, very different geometries of the intentionally-added transport mesopores can be obtained. Understanding the structure–dynamics relationships in these complex materials with multiple porosities under different thermodynamical conditions remains a challenging task. In this review, we summarize the results obtained so far on experimental and theoretical studies of diffusion in micro-mesoporous materials. By considering four common classes of bi-porous materials, which are differing by the inter-connectivities of their sup-spaces as one of the most important parameter determining the transport rates, we discuss their generic transport properties and correlate the results delivered by the equilibrium and non-equilibrium techniques of diffusion measurements.