Improvement of the hierarchical TS-1 properties by silanization of protozeolitic units in presence of alcohols

► Hierarchical TS-1 has been synthesized by crystallization of functionalized seeds. ► The role of alcohols added during the silanization stage is investigated. ► Alcohols addition increases the BET surface and the secondary porosity areas. ► Enhanced secondary porosity leads to a better epoxidation catalytic activity.