title: Preparation of mesoporous Si-C-O fibers with a narrow mesopore size distribution.
abstract: Mesoporous Si-C-O fibers were fabricated by air activation of a kind of carbon-rich SiC-C fibers at 600 degrees C. The SiC-C fibers were prepared from the hybrid precursor of polycarbosilane and pitch through melt-spinning, air curing and pyrolysis in nitrogen. The carbon content of the SiC-C fibers was 54.4 wt%, and decreased to lower than 25 wt% after activation for more than 5 hours. Meanwhile, the surface area increased up to 260 m2/g, with a narrow mesopore size distribution mainly in the range of 2-5 nm. The SiC-phase derived from the polycarbosilane and the C-phase derived from the pitch form a bicontinuous interpenetrating network, which plays an important role for the narrow pore size distribution.
authors.affiliation: Department of Bioengineering and Environmental Science, Changsha University, Changsha 410003, China.
authors.forename: Chengyong
authors.initials: C
authors.lastname: Li
authors.forename: Rongan
authors.initials: R
authors.lastname: He
authors.forename: Shiying
authors.initials: S
authors.lastname: Zhang
authors.forename: Jingyu
authors.initials: J
authors.lastname: Liu
authors.forename: Ning
authors.initials: N
authors.lastname: Yang
mesh_terms: D002244:Carbon / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D010100:Oxygen / Q000737:chemistry*; D010316:Particle Size; D012825:Silicon / Q000737:chemistry*
chemical_list: D002244:Carbon; D010100:Oxygen; D012825:Silicon