Advanced Catalysts and Nanostructured Materials

Advanced Catalysts and Nanostructured Materials

Modern Synthetic Methods
1996, Pages 1-19
Advanced Catalysts and Nanostructured Materials

Chapter 1 - Designed Synthesis of Mesoporous Molecular Sieve Systems Using Surfactant-Directing Agents

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The M41S family of materials is both unique and diverse. These materials are thermally stable mesoporous molecular sieves that have demonstrated exceptionally high sorption capacity. These sieves have been synthesized in various structures: MCM-41, the hexagonal phase; MCM-48, the cubic phase; MCM-50, the stabilized lamellar phase. The pore size can be changed by varying the alkyl chain length of the surfactant or by adding various amounts of an auxiliary organic to the synthesis. Postsynthesis functionalization of the pore walls is another method for modifying the pore size and the sorption character of the material. The M41S family of materials represents an example of a molecular sieve system whose physical properties can be designed by controlled synthesis variations.

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