Temperature-programmed desorption vs. N2 desorption in determining pore-size distribution of mesoporous silica molecular sieves

Two mesoporous silica molecular sieves, one synthesised by the cationic template method and the other by a neutral template route, were characterised for their pore-size distribution by a novel Temperature-Programmed Desorption (TPD) method and the widely used N2 desorption method. The pore-size dis...

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Bibliographic Details
Published in:Journal of porous materials 1996, Vol.3 (2), p.115-119
Main Authors: Komarneni, Sridhar, Menon, V. C., Pidugu, R., Goworek, J., Stefaniak, W.
Format: Article
Language:English
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Summary:Two mesoporous silica molecular sieves, one synthesised by the cationic template method and the other by a neutral template route, were characterised for their pore-size distribution by a novel Temperature-Programmed Desorption (TPD) method and the widely used N2 desorption method. The pore-size distributions determined by the two methods agree quite well and are within experimental error. The TPD method gave a pore-size distribution (radius) centred at 1.4 nm while N2 desorption method showed a peak centred at 1.33 nm for the mesoporous silica prepared by cationic template route. The new TPD method based on TGA is a viable option for mesopore characterisation of silica-@close@ based materials. 15 refs.
ISSN:1380-2224
1573-4854
DOI:10.1007/BF01186041