The ordered bimodal mesoporous silica MCM-48 spheres were facile synthesized by mild-temperature post-synthesis H2
hydrothermal treatment of as-synthesized MCM-48. The results showed that H2
is indispensable for simultaneously removing organic templates and forming ordered bimodal mesoporous silica MCM-48 spheres. The bimodal mesoporous MCM-48 was characterized by X-ray diffraction, transmission electron micrographs, FT-IR, and N2
adsorption-desorption, and a possible mechanism was proposed for the formation of bimodal mesoporous MCM-48.