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Reversible sorption of water in the crystalline microporous semiconductor K-SBC-1

Alexander Shulman ; Ezio Zanghellini (Institutionen för teknisk fysik, Kondenserade materiens fysik) ; Anders Palmqvist (Institutionen för kemi- och bioteknik, Teknisk ytkemi)
Microporous and Mesoporous Materials (1387-1811). Vol. 132 (2010), 1-2, p. 128-131.
[Artikel, refereegranskad vetenskaplig]

Microporous semiconducting crystal structures are exceedingly rare and their usefulness for applications typical for microporous semiconductors is largely related to their sorption properties and to their semiconductor response to sorption. The sorption properties of the unique crystalline microporous semiconducting antimony(III) oxide telluride K-SBC-1 were evaluated by means of temperature-resolved diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy, thermogravimetric analysis (TGA/DSC), and X-ray powder diffraction. K-SBC-1 was found to demonstrate heat-induced reversible sorption and desorption-induced rearrangements of guest water molecules. Upon heating to 300 degrees C 66% of the water content of K-SBC-1 desorbed. Desorption of water could be made more facile through activation of K-SBC-1 by heat treatment and then occurred at room temperature in a flow of nitrogen. These are unique properties compared to the few known related structures and thus represent a significant advancement in the field of microporous semiconductors. (C) 2010 Elsevier Inc. All rights reserved.

Nyckelord: Guest-host structures, IR spectroscopy, Microporous semiconductors, Sorption, X-ray diffraction, NANOPOROUS SEMICONDUCTORS, CHALCOGENIDES, CONDUCTANCE, CETINEITES, FRAMEWORK

Denna post skapades 2010-06-03.
CPL Pubid: 122272


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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens fysik (1900-2015)
Institutionen för kemi- och bioteknik, Teknisk ytkemi (2005-2014)



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