Effect of combination sequence of precursors on the structural and catalytic properties of Ti-SBA-15
Journal
Rsc Advances
Journal Volume
3
Journal Issue
31
Pages
12604-12610
Date Issued
2013
Author(s)
Abstract
The combination sequence of Ti and Si precursors (TTIP and TEOS) in the synthesis solution of Ti-incorporated SBA-15 mesoporous silica (shortly termed Ti–SBA-15) was found for the first time to be critical for the distribution of tetrahedrally (Td) coordinated Ti(IV) sites in the resultant Ti–SBA-15. It was found that TTIP pre-assembled with P123 in the synthesis solution for 3 h before the addition of TEOS gave Td-coordinated Ti(IV) sites predominately incorporated near the superficial regions of the framework and were highly accessible to the reactants in catalytic reactions.
Type
journal article