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Journal of Nanomaterials
Volume 2015, Article ID 149654, 7 pages
Research Article

Mesoporous Structure Control of Silica in Room-Temperature Synthesis under Basic Conditions

1Petroleum-Gas Research Center, Korea Institute of Energy Research, Daejeon 305-343, Republic of Korea
2Corrosion Research Center, Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA
3School of Applied Chemical Engineering, Chonnam National University, Gwangju 500-757, Republic of Korea

Received 8 October 2014; Revised 31 December 2014; Accepted 31 December 2014

Academic Editor: Abdelwahab Omri

Copyright © 2015 Jeong Wook Seo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Various types of mesoporous silica, such as continuous cubic-phase MCM-48, hexagonal-phase MCM-41, and layer-phase spherical silica particles, have been synthesized at room temperature using cetyltrimethylammonium bromide as a surfactant, ethanol as a cosurfactant, tetraethyl orthosilicate as a silica precursor, and ammonia as a condensation agent. Special care must be taken both in the filtering of the resultant solid products and in the drying process. In the drying process, further condensation of the silica after filtering was induced. As the surfactant and cosurfactant concentrations in the reaction mixture increased and the NH3 concentration decreased, under given conditions, continuous cubic MCM-48 and layered silica became the dominant phases. A cooperative synthesis mechanism, in which both the surfactant and silica were involved in the formation of mesoporous structures, provided a good explanation of the experimental results.