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Observation of Adsorption of Water in MCM-41 with Neutron Diffraction

Adsorption/desorption of water in the mesoporous material MCM-41 was observed with neutron diffraction. Results obtained with a H2O/D2O mixture contrast-matched to the host material unambiguously show that the pores are fully hydrated in the presence of excess water. During desorption carried out by...

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Bibliographic Details
Published in:Langmuir 2002-02, Vol.18 (4), p.975-977
Main Authors: Tun, Z, Mason, P. C, Mansour, F. K, Peemoeller, H
Format: Article
Language:English
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Summary:Adsorption/desorption of water in the mesoporous material MCM-41 was observed with neutron diffraction. Results obtained with a H2O/D2O mixture contrast-matched to the host material unambiguously show that the pores are fully hydrated in the presence of excess water. During desorption carried out by air-drying a saturated sample, water in the partially filled pores redistributes and the statistical distribution of water within each pore is characterized by a smooth function that decreases from a maximum around the edge to a minimum at the center.
ISSN:0743-7463
1520-5827
DOI:10.1021/la0014252