Designed synthesis of mesopore molecular sieve systems using surfactant directing agents
- Mobil Research and Development Corp., Princeton, NJ (United States); and others
The use of cationic surfactants as structure directing agents resulted in the discovery of the first mesoporous aluminosilicate molecular sieves designated as M41S. These aluminosilicate systems have shown behavior parallel to that of lyotropic liquid crystals including certain phenomena which are peculiar to surfactant systems. The ability of the surfactant/aluminosilicate complex intermediate to self-assemble into stable extended structures results in the synthesis of mesoporous materials with structural diversity including hexagonal, cubic, and lamellar phases. Pore size variation of these materials (15 to 100 {Angstrom}) can beg synthesized by either change of surfactant chain length or the addition of swelling organic agents. These phenomena allow for the construction of both specific pore size and molecular sieve structure that has not been achieved in microporous systems. The presence of discrete mesopores in these materials and the generation of accessible silanol groups within the pore system allows for the post-synthesis functionalization of the pore wall.
- OSTI ID:
- 126761
- Report Number(s):
- CONF-950402--
- Country of Publication:
- United States
- Language:
- English
Similar Records
A new family of mesosporous molecular sieves prepared wtih liquid crystal templates
Synthesis of mesoporous molecular sieves and their application for catalytic conversion of polycyclic aromatic hydrocarbons