Mesoporous Sba-15 Preparation And Modification

SBA-15 was selected as the research object in this dissertation and the achievements obtained based on this materials includes the following aspects:1. We studied the influences of the ratio of surfactants, the different dry methods and the silica sources, stirring or aging and other factors of the synthesis on the shapes and the surface area of SBA-15. The morphology, surface area and pore size were investigated with scanning electron microscopy and nitrogen sorption technique; In comparison with the general hydrothermal synthesis, the influence of the irradiation time of the microwave oven on the surface area and the pore size of the production have also been clarified;2. Surfactant-free mesoporous silica was employed as the hard templates to the synthesis of mesoporous carbon with high surface area and narrow pore distribution. And sucrose was chose as carbon source. The surfactant was in-situ carbonized and deposited inside the channels of the pores of SBA-15 via a reaction under Autogenic Pressure at Elevated Temperatures (RAPET). The characteristic of the products was discussed with the scanning electron microscopy,nitrogen sorption technique, transmission electron microscope, thermo gravimetric analysis and so on.3. The cobalt precursors was firstly introduced into the channels of SBA-15, and then the cobalt ion was deoxidized via a reaction under Autogenic Pressure at Elevated Temperatures (RAPET), the mesoporous SiO2 containing the cobalt particles was obtained, and the composite can be used for magnet induced separation. The influence of the ratio of the precursors on the surface area and pore size of the Co-SBA-15 composites was also discussed.