Reversible sorption of water in the crystalline microporous semiconductor K-SBC-1
Artikel i vetenskaplig tidskrift, 2010

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.

IR spectroscopy

Microporous semiconductors

Sorption

NANOPOROUS SEMICONDUCTORS

Guest-host structures

CHALCOGENIDES

CONDUCTANCE

FRAMEWORK

X-ray diffraction

CETINEITES

Författare

Alexander Shulman

Chalmers University of Technology

Ezio Zanghellini

Chalmers, Teknisk fysik, Kondenserade materiens fysik

Anders Palmqvist

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Microporous and Mesoporous Materials

1387-1811 (ISSN)

Vol. 132 128-131

Ämneskategorier

Kemiteknik

DOI

10.1016/j.micromeso.2010.02.009