Synthesis, characterization and catalytic activity of selective oxidation zeolites catalysts

摘要

Zeolites TS-1, TS-2, VS-1, Ti-NCL, TiBEA and FeBEA were synthesized via a new procedure, the sol-gel method. The samples were characterized by FT-IR spectroscopy, BET surface area, pyridine adsorption, XRD-synchrotron, temperature programmed desiorption of the template, adn were tested in the hydroxylation of benzene to phenol, oxifunctionalization of n-hexane, epoxidation of 1-hexene, selective transformation of toluene to benzaldehyde and oxidation of 2-methylnaphthalene into 2-methyl-1,4-naphthoquinone. The results showed the incorporation of Ti, V and Fe into the framework and high crystallinity of the catalytic materials. Special attention was paid to sol-gel method using raw amorphous SiO_2/Heteroatoms Oxide xerogels.