Thomas, M.A. and Coleman, Nichola (2001) Characterization of a gel-derived silica intended for use as a reference material. Colloids and Surfaces a-Physicochemical and Engineering Aspects, 187. pp. 123-130. ISSN 0927-7757 (doi:https://doi.org/10.1016/S0927-7757(01)00629-X)

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Abstract

A new candidate surface area and pore volume reference material is proposed. A mesoporous gel-derived silica monolith has been investigated by nitrogen sorption and mercury intrusion porosimetry. BET specific surface area (165.5 m(2) g(-1)), specific pore volume (0.986 cm(3) g(-1)) and mean pore radius (11.9 nm) have been monitored for up to 12 months by nitrogen sorption. No significant changes occurred following either storage or repeated usage. The pore volume measured by mercury intrusion is in excellent agreement despite significant compression. The pore structure remained unaltered despite multiple mercury intrusion cycles up to high pressure. This remarkable stability and durability confers properties that compare favorably with those of commercially available reference materials. The primary advantage of the gel-silica monolith is the elimination of errors associated with powder sampling. (C) 2001 Elsevier Science B.V. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	Sol-gel, BET, Surface area, Reference
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science > School of Science (SCI)
Last Modified:	17 Oct 2016 09:12
URI:	http://gala.gre.ac.uk/id/eprint/11825

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