Synthesis of Ordered Bimodal Mesoporous Silica Nanoparticles from as Synthesized MCM-48

Abstract

The convenient preparation of ordered bimodal mesoporous silica nanoparticles has been achieved by mild-temperature post-synthesis hydrothermal treatment of as-synthesized MCM-48 mesoporous materials in H₂O₂ solution. X-ray diffraction, TEM, FT-IR, TGA and nitrogen sorption were used to characterize the obtained bimodal mesoporous silica sample. The bimodal mesoporous MCM-48 can be obtained only under H₂O₂ hydrothermal treatment. Hydrogen peroxide plays an important role in simultaneously removing organic templates and forming ordered bimodal mesopores.