Carbothermal synthesis of porous silicon carbide using mesoporous silicas

Nataliya D. Shcherban, Svitlana M. Filonenko, Pavel S. Yaremov, Sergii A. Sergiienko, Volodymir G. Ilyin, Dmitry Murzin

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)

Abstract

Samples of crystal modifications of porous silicon carbide were obtained by carbothermal method using carbon precursors (sucrose, carbon) and aerosil or mesoporous silicas molecular sieves SBA-3, SBA-15, KIT-6, and MCF as silicon sources. Porous β-SiC samples obtained from carbon–silica composites are characterized by high structural and sorption characteristics ( SBET up to 410 m 2/g, Vpore up to 1.0 cm 3/g). High hydrogen adsorption capacity of silicon carbide samples based on KIT-6 (up to 1.24 wt% at 77 K and 1 atm.), considering low adsorption energy ( |Δμ0|H2) up to 2.3 kJ/mol for SiC vs. ca. 5.0 kJ/mol for carbon), was determined. The highest ever reported value among the existing porous materials was observed for specific adsorption of H 2 by SiC (specific adsorption on the pore surface, ρ up to 15 μmol/m 2) corresponding to almost complete filling of the surface with hydrogen in the examined conditions (77 K, 1 atm.).
Original languageUndefined/Unknown
Pages (from-to)3917–3926
JournalJournal of Materials Science
Volume52
Issue number7
DOIs
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • Chemical Engineering

Cite this