title: Synthesis and characterization of SiC materials with hierarchical porosity obtained by replication techniques.
abstract: Porous silicon carbide monoliths were obtained using the infiltration of preformed SiO(2) frameworks with appropriate carbon precursors such as mesophase pitch. The initial SiO(2) monoliths possessed a hierarchical pore system, composed of an interpenetrating bicontinuous macropore structure and 13 nm mesopores confined in the macropore walls. After carbonization, further heat treatment at ca. 1,400 degrees C resulted in the formation of a SiC-SiO(2) composite, which was converted into a porous SiC monolith by post-treatment with ammonium fluoride solution. The resulting porous SiC featured high crystallinity, high chemical purity and showed a surface area of 280 m(2) g(-1) and a pore volume of 0.8 ml g(-1).
authors.affiliation: Max Planck Institute of Colloids and Interfaces, Research Campus Golm, Am Muehlenberg 1, D-14476 Golm, Germany.
authors.forename: Kirstin
authors.initials: K
authors.lastname: Sonnenburg
authors.forename: Philipp
authors.initials: P
authors.lastname: Adelhelm
authors.forename: Markus
authors.initials: M
authors.lastname: Antonietti
authors.forename: Bernd
authors.initials: B
authors.lastname: Smarsly
authors.forename: Robert
authors.initials: R
authors.lastname: Nöske
authors.forename: Peter
authors.initials: P
authors.lastname: Strauch
mesh_terms: D017554:Carbon Compounds, Inorganic / Q000138:chemical synthesis* / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D016062:Porosity; D017655:Silicon Compounds / Q000138:chemical synthesis* / Q000737:chemistry*
chemical_list: D017554:Carbon Compounds, Inorganic; D017655:Silicon Compounds; C022088:silicon carbide