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Adsorption hysteresis in ordered mesoporous silicas

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Abstract

We review some recent progress in experimental studies of the adsorption hysteresis of simple molecules in ordered mesoporous silicas. We show that the nature of the adsorption hysteresis due to capillary condensation can be examined with less ambiguity by measuring the hysteresis loop for the ordered mesoporous silicas with three types of pore geometries (cylindrical, interconnected cylindrical, and interconnected spherical) over a wide temperature range. The adsorption hysteresis arises from the metastability of a confined phase and the temperature at which the hysteresis disappears is lower than the critical temperature of vapor-liquid equilibrium in pores. The hysteresis occurs mainly on the desorption rather than adsorption branch, irrespective of the pore geometries.

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Correspondence to Kunimitsu Morishige.

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Morishige, K. Adsorption hysteresis in ordered mesoporous silicas. Adsorption 14, 157–163 (2008). https://doi.org/10.1007/s10450-007-9086-5

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  • DOI: https://doi.org/10.1007/s10450-007-9086-5

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