Post-synthesis introduction of transition metals in surfactant-containing MCM-41 materials

V and TiMCM-41 have been prepared by post-synthesis modification of an as-made pure silica material in the liquid phase. Relatively high metal contents can be introduced without affecting the long-range ordering of the parent material. Solids with increasing metal contents have been characterized by X-ray diffraction, UV–VIS, IR and X-ray photoelectron spectroscopies. The results indicate that the metal species are essentially atomically dispersed at low loading (Me/Si