Template-directed stepwise post-synthesis alumination of MCM-41 mesoporous silica

Abstract

Stepwise post-synthesis alumination of pure silica MCM-41 in which increasing proportions of the MCM-41 are aluminated depending on the amount of Al available in the synthesis gel is achieved during secondary synthesis (i.e. recrystallisation) of calcined pure silica MCM-41 in the presence of discrete amounts of Al.