Water Dynamics in Bulk and Dispersed in Silica CaCl2 Hydrates Studied by Neutron Scattering Methods | Sciact - CRIS-system of Boreskov Institute of Catalysis

Water Dynamics in Bulk and Dispersed in Silica CaCl2 Hydrates Studied by Neutron Scattering Methods Full article

Journal

Microporous and Mesoporous Materials
ISSN: 1387-1811 , E-ISSN: 1873-3093

Output data

Year: 2009, Volume: 125, Number: 1-2, Pages: 46-50 Pages count : 5 DOI: 10.1016/j.micromeso.2009.02.016

Tags

Neutron scattering, Silica, Water

Authors

Kolokolov Daniil I. ^1,2 , Stepanov Alexander G. ² , Glaznev Ivan S. ² , Aristov Yurii I. ² , Plazanet Marie ³ , Jobic Hervé ¹

Affiliations

1	Institut de Recherches sur la Catalyse et l’Environnement de LYON, Université Lyon 1, CNRS, UMR 5256, 2 avenue Albert Einstein, F-69626 Villeurbanne, France
2	Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Prospekt Akademika Lavrentieva 5, Novosibirsk 630090, Russia
3	Institut Laue-Langevin, 6 rue Jules Horowitz, BP 156, 38042 Grenoble, France

Funding (2)

1	Russian Foundation for Basic Research	05-03-34762
2	French Embassy in Moscow

Quasi-elastic and inelastic neutron scattering techniques have been used to study the dynamics of water in CaCl2 · nH2O (n = 1/3,2,4,6,9) hydrates dispersed in silica, in comparison with the bulk hydrates. Inelastic scattering shows that the water molecules in dispersed hydrates are in an amorphous state. Quasi-elastic scattering indicates a higher mobility of water in the hydrates dispersed in silica, compared to bulk hydrates. The self-diffusivity of water in the dispersed hydrates increases with water concentration, while remaining below the one of pure water. The neutron and pulsed-field gradient NMR diffusivities are similar, which indicates that the hydrates form a thin and continuous layer on the pore walls of silica.

Kolokolov D.I. , Stepanov A.G. , Glaznev I.S. , Aristov Y.I. , Plazanet M. , Jobic H.
Water Dynamics in Bulk and Dispersed in Silica CaCl2 Hydrates Studied by Neutron Scattering Methods
Microporous and Mesoporous Materials. 2009. V.125. N1-2. P.46-50. DOI: 10.1016/j.micromeso.2009.02.016 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Oct 23, 2008
Accepted:	Feb 4, 2009
Published online:	Feb 20, 2009
Published print:	Oct 1, 2009

Web of science:	WOS:000269242200009
Scopus:	2-s2.0-67749133683
Elibrary:	13606535
Chemical Abstracts:	2009:909660
Chemical Abstracts (print):	153:319473
OpenAlex:	W2060659518

DB	Citing
Web of science	2
Scopus	4
Elibrary	4
OpenAlex	4