Dresden 2026 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 6: French-German Session: Membranes and Porous Materials II
CPP 6.2: Vortrag
Montag, 9. März 2026, 11:45–12:00, ZEU/LICH
Accessing topological properties of mesoporous materials via SDGW model — •Georgiy Baroncha1, Rustem Valiullin1, and Eustathios Kikkinides2 — 1Felix Bloch Insitute for Solid State Physics, Leipzig University, Leipzig, Germany — 2Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece
Gas sorption is commonly used to characterize mesoporous materials, but its ability to reveal how pores are interconnected remains limited due to an incomplete understanding of network effects on phase behavior. In this work, we represent mesoporous structures using statistically disordered Bethe, and apply a statistical-thermodynamic approach to interpret adsorption/desorption or melting/freezing phase transitions. We demonstrate that gas sorption analysis can be used not only to determine pore size distributions, but also to quantitatively infer the average interpore connectivity and correlations between pore diameters in the material. At the same time, we find that sorption isotherms are largely unaffected by other aspects of pore network topology. These results identify the key structural factors shaping sorption behavior and broaden the capabilities of gas sorption for simultaneous assessment of pore size distribution and mean connectivity in mesoporous materials.
Keywords: Adsorption/desorption; Melting/freezing; Lattices; Pore network; Connectivity