Open AccessRole of Silver Nanoparticles in Enhanced Xenon Adsorption Using Silver-Loaded Zeolites
Author(s) -
Ludovic Deliere,
Sylvain Topin,
Benoît Coasne,
J.-P. Fontaine,
Sophie De Vito,
Christophe Den Auwer,
Lorenzo Solari,
Cécile Daniel,
Y. Schuurman,
David Farrusseng
Publication year - 2014
Publication title -
the journal of physical chemistry c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.401
H-Index - 289
eISSN - 1932-7455
pISSN - 1932-7447
DOI - 10.1021/jp507590a
Subject(s) - physisorption , zeolite , adsorption , silver nanoparticle , materials science , xenon , nanoparticle , crystallite , chemical engineering , transmission electron microscopy , molecular sieve , inorganic chemistry , nanotechnology , chemistry , organic chemistry , catalysis , metallurgy , engineering
International audienceMolecular 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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