Accessibility navigation


Pore anisotropy and microporosity in nanostructured mesoporous solids

Knowles, J., Armatas, G., Hudson, M. and Pomonis, P. (2006) Pore anisotropy and microporosity in nanostructured mesoporous solids. Langmuir, 22 (1). pp. 410-418. ISSN 0743-7463

Full text not archived in this repository.

It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing.

To link to this item DOI: 10.1021/la051887l

Abstract/Summary

In this study, we carried out an investigation related to the determination of the anisotropy (b) of pores as well as the extent of microporosity (mic%) in various groups of nanostructured mesoporous materials. The mesoporous materials examined were fifteen samples belonging to the following groups of solids: MCM-48s, SBA-15s, SBA-16s, and mesoporous TiO2 anatases. The porosities of those materials were modified either during preparation or afterward by the addition of Cu(II) species and/or 3(5)-(2-pyridinyl) pyrazole (PyPzH) into the pores. The modification of porosity in each group took place to make possible the internal comparison of the b and mic% values within each group. The estimation of both the b and mic% parameters took place from the corresponding nitrogen adsorption-desorption isotherms. The new proposed method is able to detect a percentage of microporosity as low as a few percent, which is impossible by any of the methods used currently, without the use of any reference sample or standard isotherms. A meaningful inverse relationship is apparent between the b and mic% values, indicating that large values of b correspond to small values of mic%.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:11398
Uncontrolled Keywords:ADSORPTION-ISOTHERMS, ELECTRON-MICROSCOPY, NANOMETER-SCALE, POROUS, SOLIDS, SURFACE-AREA, BET EQUATION, CATALYSTS, SILICA, COPOLYMER, MCM-41

University Staff: Request a correction | Centaur Editors: Update this record

Page navigation