Fe-incorporation into mesoporous SBA-15 materials by direct synthesis and post-synthesis

摘要

Fe containing SBA-15 mesoporous material was successfully prepared by direct synthesis and post-synthesis (atomic implantation) methods. The obtained Fe-SBA-15 samples were characterized by different techniques such as XRD, BET, TEM and UV-Vis. It showed that for both methods, Fe containing SBA-15 samples have highly ordered hexagonal nano-structure with large pore size. It revealed the existence of both Fe species: Fe-tetrahedral coordinated and Fe-highly dispersed species. However, higher portion of Fe-highly dispersed species in the samples prepared post-synthesis (atomic implantation) was found. The Fe-SBA-15 catalysts were tested in catalytic oxidation of phenol and red phenol. The results indicated that both Fe-incorporated and Fe-highly dispersed species were active sites. However, the latter exhibited higher activity compared to the former ones.