Deposition of vanadium silicalite-1 nanoparticles on SBA-15 materials. Structural and transport characteristics of SBA-VS-15

Properties of SBA-15 materials modified by the impregnation of vanadium silicalite-1 zeolite-like nanoparticles (SBA-VS) have been studied. The influence of the amount and concentration of impregnated nanoparticles on the structural characteristics were studied by N2-sorption measurements, TEM and HRSTEM. Increasing the amount of nanoparticles on the SBA-15 material has large consequences on the ratio of open to narrowed mesopores, the micro- and mesopore volume and the vanadium content. The influence of the impregnated nanoparticles on mobility of guest molecules in the different SBA and SBA-VS materials was studied with help of pulsed field gradient nuclear magnetic resonance. Strong effects on molecular translational diffusion produced by loading were observed. Interpretation is given in terms of structure changes and molecular exchange between the meso- and macropores.