Studies on the structural stability of mesoporous molecular sieves organically functionalized by a direct method
Abstract
The structural stability of mesoporous molecular sieves organically functionalized by a direct method has been investigated in terms of the stability against moisture treatment and mechanical pressure. Incorporation of organic groups directly attached to Si atoms by the use of organosilanes results in an enhancement of the structural stability compared to purely inorganic ones, this enhancement could be ascribed to an increase in hydrophobicity. By pH adjustment and hydrothermal treatment, a further improvement in the stability is attained. A clear relationship between the structural stability and the amount of monolayer