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Vol. 25 No. 2 (2013): Vol 25 Issue 2

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Preparation and Characterization of Integrated Bulk of Silica Aerogels

https://doi.org/10.14233/ajchem.2013.13407
Weina Zhang
College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, Jilin Province, P.R. China ; College of Chemistry, Jilin Normal University, Siping 136000, Jilin Province, P.R. China
Libo Hao
College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, Jilin Province, P.R. China
Jilong Lu
College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, Jilin Province, P.R. China
Jianwei Zhu
College of Earth Sciences, Jilin University, Changchun 130061, Jilin Province, P.R. China

Corresponding Author(s) : Jilong Lu

lujl@jlu.edu.cn

Asian Journal of Chemistry, Vol. 25 No. 2 (2013): Vol 25 Issue 2

Abstract

The integrated bulk of silica aerogels were synthesized by two step sol-gel process using tetraethoxysilane as precursor followed by supercritical drying technique. The X-ray diffraction, nitrogen adsorption-desorption method, differential thermal -thermogravimetric analysis, infrared spectroscopy and scanning electron microscopy analysis were used to observe the structure, the surface morphology and the chemical composites of the prepared silica aerogels. The results showed that the prepared silica aerogels had continual netted, amorphous and mesoporous microstructure with even spherical nanometer particles and porous channel. The density, averaged pore size and specific surface area of the prepared silica aerogels with high thermal stability were 0.12 g cm-3, 14.9 nm and 925.7 m2 g-1, respectively.

Keywords

Silica aerogels Integrated bulk Supercritical drying Characterization
Zhang, W., Hao, L., Lu, J., & Zhu, J. (2012). Preparation and Characterization of Integrated Bulk of Silica Aerogels. Asian Journal of Chemistry, 25(2), 1036–1038. https://doi.org/10.14233/ajchem.2013.13407
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