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Examination of Mesopore Structure of Hierarchically Macro/mesoporous Silica by Thermoporometry

Published online by Cambridge University Press:  01 February 2011

Etsuji Fukui ,
Keiske Shinohara ,
Kazuki Nakanishi ,
Kazuyoshi Kanamori  and
Teiichi Hanada
Etsuji Fukui
Affiliation:
gradius@kuchem.kyoto-u.ac.jp, Kyoto University Graduate School of Science, Chemistry, Kitasirakawa, Sakyo-ku, Kyoto, 606-8502, Japan, 8175-753-2925, 8175-753-2925
Keiske Shinohara
Affiliation:
all-dead@kuchem.kyoto-u.ac.jp, Kyoto University Graduate School of Science, Chemistry, Kitasirakawa, Sakyo-ku, Kyoto, 606-8502, Japan
Kazuki Nakanishi
Affiliation:
kazuki@kuchem.kyoto-u.ac.jp, Kyoto University Graduate School of Science, Chemistry, Kitasirakawa, Sakyo-ku, Kyoto, 606-8502, Japan
Kazuyoshi Kanamori
Affiliation:
kanamori@kuchem.kyoto-u.ac.jp, Kyoto University Graduate School of Science, Chemistry, Kitasirakawa, Sakyo-ku, Kyoto, 606-8502, Japan
Teiichi Hanada
Affiliation:
hanada@kuchem.kyoto-u.ac.jp, Kyoto University Graduate School of Science, Chemistry, Kitasirakawa, Sakyo-ku, Kyoto, 606-8502, Japan
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Abstract

Thermoporometry was employed to monitor the mesopore evolution in wet, drying and heat-treatment stages of monolithic macro/mesoporous silica with SBA-15 like structure. Direct comparison of mesopores in wet state was only possible with the samples extracted with sulfuric acid. In good agreement with the preceding study, the sulfuric acid not only removed the surfactant but also modified the silica gel network into that with reduced amount of micropores and increased stability against the drying stress. Thermoporometry revealed that the structural evolution takes place completely in the wet condition, which accompanies a decrease in the thickness of non-freezable water.

Keywords

porosimetryphase transformationsol-gel
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1056: Symposium HH – Nanophase and Nanocomposite Materials V , 2007 , 1056-HH11-61
Copyright
Copyright © Materials Research Society 2008

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References

REFERENCES

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