|Progress in the Structural Characterization of Advanced Nanoporous Materials |
|Matthias Thommes, Quantachrome Corporation|
10:20 AM, Room 122, BME
A comprehensive structural characterization of novel nanoporous materials has become more important than ever for the optimization of systems used in many important existing and potentially new applications. The most popular method to obtain surface area, pore size, pore size distribution and porosity information from powders and porous solids is gas adsorption. However, despite the recent progress achieved in the understanding of the adsorption mechanism of fluids in highly ordered mesoporous materials with simple pore geometries (e.g., M41S materials), there are still many open questions concerning the structural characterization of more complex porous systems. Within this context we will focus on the challenges associated with structural analysis of novel micro-mesoporous materials (e.g. micro-mesoporous zeolites, hierarchically structured porous materials) which have many potential applications (e.g. as catalyst supports, separations, etc.). We will highlight the importance of coupling gas adsorption with other experimental techniques (e.g. x-ray and neutron scattering based techniques, electronic microscopy, and others) for a comprehensive structural characterization of such complex pore networks. Indeed, major progress has been achieved concerning the structural characterization of many micro-and mesoporous materials, but macropore analysis remains problematic, despite its importance for the applications in catalysis, pharmaceuticals, building materials, adsorbents for chromatography, liquid purification or gas separation. We will briefly address this situation, also by discussing some recent advances in the application and understanding of mercury porosimetry, which despite it’s drawbacks (and the associated environmental concerns) remains, at least for the time being, the standard technique for the structural characterization of macroporous materials.
For further information call (732) 445-4949 or 2228