Synthesis and catalytic properties of organically modified Ti-HMS

摘要

It is demonstrated that the hydrophobicity of Ti-HMS catalysts can be enhanced by organic modification via either direct synthesis or post-treatment. In comparison to unmodified Ti-HMS, the catalysts obtained by direct synthesis, in which methyl and dimethyl groups were incorporated directly in the synthesis gel, exhibited comparable Ti-content but higher surface area and stronger hydrophobicity; the catalyst obtained by post-synthesis methylation of surface silicon also showed higher hydrophobicity but much lower Ti-content. Characterization results and catalytic oxidation data of 2,6 di-tert-butylphenol (DTBP) showed strong support for the occurrence of hybrid Ti-HMS-based materials.