The Preparation And Characterization Of 1d Mesoporous Materials Using AAO As Template

Recently, the preparation of mesoporous nanofiber using AAO as hard template attracts great attention. The mesoporous carbon nanofibers have large specific surface area, high pore volume and 1D nanostructures provided shortened path for the transportation, which provide a new oportunity for the design of new product and improment for conventional product. In this thesis, mesoporous carbon nanofibers, Ru nanopaticle/mesoporous carbon nanofibers and mesoporous oxide nanofibers were prepared and characterized.Mesoporous carbon nanofibers with core-shell structure were prepared using the precusor of FDU-15 with 2D hexagonal mesostructure to fill the AAO template with the channel diameter of 90 nm. There is a little cracked carbon wall of mesopore connecting the core and shell, which stabilitate the core in the center of tubular shell. Another mesoporous carbon nanofibers with core-shell structure were also prepared using the precusor of FDU-14 with cubic meso-structure (Ia3d). The core and the shell is not connected by cracked carbon wall, so the core leans toward the shell by random. When the resol/surfactant precursor for FDU-16 with 3D cubic (Im3m) mesostructure was used for filling the AAO with the diameter of 25, 90, and 200 nm, mesoporous carbon nanofibers with very large mesopore were obtained, in which mesoporous carbon nanofibers obtained by using AAO template with the diameter of 25 nm present one-dimensional arrangement of mesopore. The results indicted that the pore size shows a nonlinear inverse ratio to the channel diameter of AAO template. The morphology of mesoporous carbon nanofiber under the high-temperature carbonization (900℃) was studied. The result showed that the shell of nanofibers cracked, which could been removed under ultrosonic. Thus carbon nanofibes with exposed mesopore were obtained.The electrode of mesoporous carbon nanofibers loading Pt nanopaticles were prepred with microwave method. The results showed that the nanopaticles uniformly loaded on the mesoporous carbon nanofibers. Electrochemical test shows that mesoporous carbon nanofibers has better catalysis property compared with commercial carbon materialsMesoporous carbon nanofibers containing ruthenium nanoparticles were prepared by one-step method, in which ruthenium chloride was added to the precursor of carbon nanofibers. The ruthenium nanoparticles embedded in mesoporous carbon wall. The particle size was small and has good crystallization.Mesoporous silica nanofibers with a columnar hexagonal 2D structure along the vertical channels of the AAO were prepared using sol-gel method under the NaCl induced conditon, and the pore diameter of which is about 10 nm. Similarly, mesoporous nanofibers of titanium dioxide, tin oxide and cerium oxide with disordered mesoporous structure ware also prepared using sol-gel method, in which mesoporous titanium dioxide and tin oxide nanofibers have good fiber structure.