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Physisorption hysteresis loops and the characterization of nanoporous materials

Sing, Kenneth S.W. and Williams, Ruth T. (2004). Physisorption hysteresis loops and the characterization of nanoporous materials. Adsorption Science and Technology, 22(10) pp. 773–782.

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The classification of adsorption hysteresis loops recommended by the IUPAC in 1984 was based on experimental observations and the application of classical principles of pore filling (notably the use of the Kelvin equation for mesopore analysis). Recent molecular simulation and density functional (DFT) studies of the physisorption of gases by model pore structures have greatly improved our understanding of the mechanisms of hysteresis and it is therefore timely to revisit the IUPAC recommendations. In this review, we conclude that there is no immediate need to change the IUPAC classification of physisorption isotherms and hysteresis loops. However, in the light of recent advances we are able to offer a revised checklist for the analysis of nitrogen isotherms on nanoporous solids: this includes a carefully regulated application of DFT in place of a classical procedure such as the well-known Barrett-Joyner-Halenda (BJH) method.

Item Type: Journal Article
Copyright Holders: Not known
ISSN: 0263-6174
Keywords: adsorption hysteresis; physisorption of gases; nanoporosity; pore size analysis
Academic Unit/Department: Science > Life, Health and Chemical Sciences
Interdisciplinary Research Centre: Biomedical Research Network (BRN)
Item ID: 4273
Depositing User: Ruth T. Williams
Date Deposited: 04 Jul 2006
Last Modified: 14 Jan 2016 16:00
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