| 초록 |
Silicon carbide is a promising material for various applications such as catalyst support, adsorption/separation, sensor technology and other fields. In this study, ordered mesoporous SiC material was prepared for the first time using polyallylcarbosilane as a preceramic polymer by utilizing ordered mesoporous silica molecular sieve SBA-15 as a template which was subsequently etched off after pyrolysis in a nitrogen atmosphere. For the good infiltration of the preceramic polymer, we have prepared large-pore SBA-15 silica with periodic 20nm pores, and then modified it to hydrophobic by introducing trimethylsilyl onto its channel surface. The average pore diameter of the mesoporous SiC is 5.01nm and the surface area is 495m2/g. The ordered structure of the prepared mesoporous SiC material was exactly an inverse replica of SBA-15 without involving structural transformation during the removal of the silica template. |
