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Synthesis and characterization of SiC materials with hierarchical porosity obtained by replication techniques

  • Porous silicon carbide monoliths were obtained using the infiltration of preformed SiO2 frameworks with appropriate carbon precursors such as mesophase pitch. The initial SiO2 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. 1400 degrees C resulted in the formation of a SiC-SiO2 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)

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Author:Kirstin Sonnenburg, Philipp AdelhelmORCiD, Markus AntoniettiORCiDGND, Bernd Smarsly, Robert Nöske, Peter StrauchGND
Document Type:Article
Year of first Publication:2006
Year of Completion:2006
Release Date:2017/03/25
Source:Physical chemistry chemical physics. - 8 (2006), 30, S. 3561 - 3566
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie
Peer Review:Referiert
Institution name at the time of publication:Mathematisch-Naturwissenschaftliche Fakultät / Institut für anorganische Chemie und Didaktik der Chemie