Expansion of tetrachloroaluminate-graphite intercalation compound by reaction with anhydrous hydrogen fluoride

详细信息    查看全文

• 作者：Kazuhiko Matsumoto ; Daisuke Minori ; Kosuke Takagi ; Rika Hagiwara
• 刊名：Carbon
• 出版年：February, 2014
• 年：2014
• 卷：67
• 期：Complete
• 页码：434-439
• 全文大小：1096 K

文摘

Reaction of the stage-1 graphite tetrachloroaluminate intercalation compound prepared from highly oriented pyrolytic graphite with anhydrous HF yields expanded graphite. According to scanning electron microscopy, exfoliation of graphite layers occurs more intensely as the reaction temperature increases. X-ray diffraction shows the expanded graphite has low crystallinity and the layer structure of graphite is highly disordered. X-ray photoelectron spectroscopy confirms formation of AlF₃ and absence of Cl and covalent C-F bonds. Infrared spectroscopy reveals the gaseous species released during the expansion are HCl and CF₄. These observations suggest the following reaction is the source of the expansion: .