Generalized synthesis of periodic surfactant/inorganic composite materials

THE recent synthesis of silica-based mesoporous materials1,2 by the cooperative assembly of periodic inorganic and surfactant-based structures has attracted great interest because it extends the range of molecular-sieve materials into the very-large-pore regime. If the synthetic approach can be generalized to transition-metal oxide mesostructures, the resulting nanocomposite materials might find applications in electrochromic or solid-electrolyte devices3,4, as high-surface-area redox catalysts5 and as substrates for biochemical separations. We have proposed recently6 that the matching of charge density at the surfactant/inorganic interfaces governs the assembly process; such co-organizatio…

Surfactant controlled preparation of mesostructured transition-metal oxide compounds

The use of surfactants as templates allows the synthesis of mesostructured transition-metal oxides by a cooperative, interface controlled condensation process.

Organization of Organic Molecules with Inorganic Molecular Species into Nanocomposite Biphase Arrays

Formation of a Porous Zirconium Oxo Phosphate with a High Surface Area by a Surfactant-Assisted Synthesis

Ein poröses Zirconiumoxophosphat sehr hoher Oberfläche durch eine tensidunterstützte Synthese

Critical Appraisal of the Pore Structure of MCM-41

Purely siliceous and aluminosilicate types of MCM-41 were synthesized and characterized by means of X-ray diffraction (XRD), transmission electron microscopy (TEM), nitrogen sorption (NS) and size exclusion chromatography (SEC).

MCM-41 and related materials as media for controlled polymerization processes

The synthesis of mesoporous MCM-41 type materials based on transition metal oxides and the polymerization of several monomers within MCM-41 is presented with the aim to specifically investigate the effects of the interface and confinement on host-guest interactions. In addition to standard MCM-41, material based on transition metal oxides is obtained although template removal has been unsuccessful for such compounds until now. In situ polymerization of styrene, methyl methacrylate and vinyl acetate is possible within the mesopore system. The properties of some of the encapsulated polymers differ markedly with those obtained in the bulk.

Surfactant based synthesis of oxidic catalysts and catalyst supports

The preparation of mesostructured metal oxides based on the surfactant controlledsynthesis of MCM-41 is presented. It can be expected that the new metal oxide materials will exhibit a high surface area of nearly 1000 m 2 /g and could have a possible use as catalysts, especially in partial oxidation reactions and as hosts for quantum sized material, if the surfactant can be removed without destroying the structure.