Influence of Synthesis Parameters upon the Textural and Structural Properties of Silica-based Mesoporous Molecular Sieves

Silica-based mesoporous molecular sieves was synthesized by hydrothermal method and characterized by N2 sorption and TEM.The results showed that the pore size of the prepared material increased with the increase of crystallization temperature under the same condition.It was also found that pore size became larger with the increase of crystallization time and the largest one was 4.54 nm when it was crystallized for three days.The opposite behavior was observed for the average specific surface area.Both the pore size and surface area decreased with the increase of calcination temperature due to the destruction of the mesoporous structure.