Ordered Mesoporous Boron Carbide Based Materials via Precursor Nanocasting

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• 作者：Lars Borchardt ; Emanuel Kockrick ; Philipp Wollmann ; Stefan Kaskel ; Marta M. Guron ; Larry G. Sneddon ; Dorin Geiger
• 刊名：Chemistry of Materials
• 出版年：2010
• 出版时间：August 24, 2010
• 年：2010
• 卷：22
• 期：16
• 页码：4660-4668
• 全文大小：1052K
• 年卷期：v.22,no.16(August 24, 2010)
• ISSN：1520-5002

文摘

Ordered mesoporous boron carbide materials with high specific surface areas up to 778 m²/g and hexagonal pore arrangement symmetries were obtained for the first time using a nanocasting strategy and the molecular bisdecaboranyl-hexane precursor for the infiltration into an ordered mesoporous silica template (SBA-15). Different preparation conditions were investigated, and it was found that by adjusting the precursor loading either nanorod structured replicas or tubular structured (CMK-5-like) materials were obtained. Changing the impregnation techniques, the solvents, and/or the pyrolysis temperatures allows tailoring of the properties of the hexagonal ordered mesoporous boron carbide replicas. The pore arrangement was altered to cubic ordered mesoporous boron carbide using KIT-6 silica matrix for nanocasting.