The Open UniversitySkip to content
 

The use of molecular probes for the characterization of nanoporous adsorbents

Sing, Kenneth S. W. and Williams, Ruth T. (2004). The use of molecular probes for the characterization of nanoporous adsorbents. Particle and Particle Systems Characterization, 21(2) pp. 71–79.

DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1002/ppsc.200400923
Google Scholar: Look up in Google Scholar

Abstract

Molecular probes can be employed in three different ways for the characterization of nanoporous adsorbents. The simplest approach is to use a range of globular nonpolar molecules of different diameter in order to assess the effective size of the pore entrances in a molecular sieve. For this purpose, conventional gas adsorption (static or dynamic measurements) or gas chromatographic techniques can be used. The aim of the second approach is to characterize the nanopore structure with the aid of nitrogen adsorption at 77 K together with isotherm and adsorption energy measurements with a variety of adsorptives of different molecular size, shape and polarity. The third approach is to make use of polar probe molecules (notably water and alcohols) to investigate the surface chemistry and stability of the adsorbent.

Item Type: Journal Article
Copyright Holders: 2004 WILEY-VCH Verlag GmbH&Co. KGaA, Weinheim
ISSN: 1521-4117
Keywords: adsorption; molecular probes; nanopores; physisorption; sorption
Academic Unit/Department: Science > Life, Health and Chemical Sciences
Interdisciplinary Research Centre: Biomedical Research Network (BRN)
Item ID: 4274
Depositing User: Ruth T. Williams
Date Deposited: 04 Jul 2006
Last Modified: 10 Mar 2014 10:39
URI: http://oro.open.ac.uk/id/eprint/4274
Share this page:

Actions (login may be required)

View Item
Report issue / request change

Policies | Disclaimer

© The Open University   + 44 (0)870 333 4340   general-enquiries@open.ac.uk