Structure-directed materials syntheses
Synthesis field diagrams for the preparation of mesostructured silicas
- authored by
- Peter Behrens, Andreas Glaue, Christian Haggenmüller, Gallus Schechner
- Abstract
Mesostructured silicas can be obtained from silica solutions or gels containing amphiphilic surfactants as structure-directing agents. Composite materials with hexagonal (MCM-41), cubic (MCM-48), lamellar (MCM-50) and with disordered (LMU-1) topologies are formed in the system CnTMA+-SiO2-KOH-water-ethanol, where CnTMA+ is an alkyltrimethylammonium cation. The first synthesis field diagram obtained at usual preparation conditions (2 d hydrothermal treatment at 110 °C) by systematic variation of both the surfactant (C14TMA+) and the silica concentration is presented. It reveals optimum synthesis conditions for highly ordered materials and interesting implications for the synthesis mechanism.
- External Organisation(s)
-
Ludwig-Maximilians-Universität München (LMU)
- Type
- Article
- Journal
- SOLID STATE IONICS
- Volume
- 101-103
- Pages
- 255-260
- No. of pages
- 6
- ISSN
- 0167-2738
- Publication date
- 11.1997
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- General Chemistry, General Materials Science, Condensed Matter Physics
