Yan Jia, Wang Anjie, Kim Dong-Pyo
State Key Laboratory of Fine Chemicals, Dalian University of Technology, 158 Zhongshan Road, Dalian 116012, P. R. China.
J Phys Chem B. 2006 Mar 23;110(11):5429-33. doi: 10.1021/jp057378+.
Highly ordered mesoporous SiC materials were prepared by infiltrating viscous liquid preceramic polymer, allylhydridopolycarbosilane, into two types of surface modified nanoporous silica templates: mesoporous silica SBA-15 and mesocellular siliceous foam. The silica templates were subsequently etched off after pyrolysis at 1000 degrees C under nitrogen atmosphere with the resultant formation of ordered mesoporous structures. The mesoporous SiC materials, synthesized from both types of templates possessed high Brunauer-Emmett-Teller (BET) surface areas in the range of 250-260 m(2)/g with pore sizes of 3.4-3.6 nm. The ordered structures of mesoporous SiC were exact inverse replicas of their respective silica templates, as characterized by small angle X-ray diffraction (XRD), transmission electron microscope (TEM) images, and the adsorption-desorption isotherm of nitrogen.
通过将粘性液体预陶瓷聚合物烯丙基氢化聚碳硅烷渗透到两种表面改性的纳米多孔二氧化硅模板（介孔二氧化硅SBA - 15和介孔蜂窝状硅泡沫）中，制备了高度有序的介孔碳化硅材料。随后在氮气气氛下于1000℃热解后蚀刻掉二氧化硅模板，从而形成有序的介孔结构。由这两种模板合成的介孔碳化硅材料具有250 - 260 m²/g范围内的高比表面积，孔径为3.4 - 3.6 nm。通过小角X射线衍射（XRD）、透射电子显微镜（TEM）图像和氮气吸附 - 脱附等温线表征，介孔碳化硅的有序结构是其各自二氧化硅模板的精确反相复制品。
