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Role of Silver Nanoparticles in Enhanced Xenon Adsorption Using Silver-Loaded Zeolites

Abstract : Molecular simulation is used to unravel the adsorption mechanisms of xenon on Ag-doped ZSM-5 zeolite. We show that silver nanoparticles, which form at the external surface of zeolite crystallites, are responsible for enhanced xenon physisorption at very low pressure. We also propose a simple model of adsorption on such composite materials made up of silver-exchanged zeolites and silver nanoparticles adsorbed at the zeolite surface. This model, which allows predicting the adsorption of other gases without any additional parameters, provides a tool to characterize the amount of reduced silver as well as the silver particle size distribution (in good agreement with transmission electron microscopy images). The presence of a majority of silver nanoparticles is further characterized by means of X-ray diffraction and X-ray Absorption Spectroscopy at the silver K edge.
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Submitted on : Thursday, July 29, 2021 - 5:48:50 PM
Last modification on : Wednesday, September 15, 2021 - 11:08:11 AM


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Ludovic Deliere, Sylvain Topin, Benoit Coasne, Jean-Pierre Fontaine, Sophie de Vito, et al.. Role of Silver Nanoparticles in Enhanced Xenon Adsorption Using Silver-Loaded Zeolites. Journal of Physical Chemistry C, American Chemical Society, 2014, 118 (43), pp.25032-25040. ⟨10.1021/jp507590a⟩. ⟨hal-01138386⟩



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