| 초록 |
High surface area nanoparticles can show unique physicochemical properties different from bulk one. A rather broad size distribution of nanoparticles has been one of large problems occurred during the synthesis using metal alkoxides, metal salts etc. Recently, nanoporous silica has been explored as host or template for the preparation of inorganic and organic nanoporous materials. Nanoporous was prepered cerium oxide when the cerium salt was impregnated onto the SBA-15, and subsequently crystallized with ammonia vapor under ambient condition. In this work, we prepared high surface TiO2 and ZrO2 nanoparticles inside the SBA-15. The result of XRD showed that the TiO2 particles had anatase structure with wide line broadening. HRTEM micrographs of the TiO2 sample indicated the formation of nanoparticles with a well-defined crystal structure, anatase. Similarly, the obtained ZrO2 was found to have tetragonal structure referred from the XRD spectrum. The scanning electron microscophs showed the formation of the aggregate of nanoparticles of ~ 10 nm. |
