Copper, cobalt, aluminum and Cu/Fe bimetallic spherical mesoporous MCM-41 materials have been synthesized by the modified Stöber's method and characterized by different methods (XRD, N2 adsorption-desorption, TPR, FTIR measurements). The results showed that these ions can be incorporated into the MCM-41 structure. With increasing metal content the crystallinity and the BET surface of the samples decreased indicating the limitations of the procedure. FTIR measurements revealed the presence of Lewis acid sites in all types of our materials while in case of Al-MCM-41and Cu/Fe-MCM-41 also Broensted acidity. Only copper containing and the bimetallic Cu/Fe sample showed redox behavior, Co containing samples even with higher metal content can be reduced over 970 K.
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry