A comparative study on the formation process of graphite oxide (GO) prepared both from natural graphite (NG) and expandable graphite (EG) was accomplished by XRD and XPS techniques. It reveals that expandable graphite...A comparative study on the formation process of graphite oxide (GO) prepared both from natural graphite (NG) and expandable graphite (EG) was accomplished by XRD and XPS techniques. It reveals that expandable graphite, a graphitic intercalated compound (GIC), can have easy access to an interlayer oxidation leading to higher extent of oxidation within shortened time interval. An XPS study on GO surface shows a complicate chemistry. Much more involved is the dominated graphitic carbon accumulated on the surface accompanied with a variety of oxygen containing functional groups along with oxidation. The bonding state in the surface is mostly in control of the single bond linkage, C O.展开更多
Graphite oxide(GO) was successfully prepared by using expandable graphite, which is a new starting material instead of the normally adopted natural graphite. XRD and XPS data indicated that, in the same reaction condi...Graphite oxide(GO) was successfully prepared by using expandable graphite, which is a new starting material instead of the normally adopted natural graphite. XRD and XPS data indicated that, in the same reaction condition due to the application of expandable graphite, the extent of oxidation for the product, GO, was considerably enhanced and the period required for oxidation was greatly shortened. In addition, the prepared GO was modified by surfactant, that is the new sample, S GO, was obtained. As a consequence the extended interlayer space has proved itself to be successfully intercalated by the surfactant.展开更多
文摘A comparative study on the formation process of graphite oxide (GO) prepared both from natural graphite (NG) and expandable graphite (EG) was accomplished by XRD and XPS techniques. It reveals that expandable graphite, a graphitic intercalated compound (GIC), can have easy access to an interlayer oxidation leading to higher extent of oxidation within shortened time interval. An XPS study on GO surface shows a complicate chemistry. Much more involved is the dominated graphitic carbon accumulated on the surface accompanied with a variety of oxygen containing functional groups along with oxidation. The bonding state in the surface is mostly in control of the single bond linkage, C O.
文摘Graphite oxide(GO) was successfully prepared by using expandable graphite, which is a new starting material instead of the normally adopted natural graphite. XRD and XPS data indicated that, in the same reaction condition due to the application of expandable graphite, the extent of oxidation for the product, GO, was considerably enhanced and the period required for oxidation was greatly shortened. In addition, the prepared GO was modified by surfactant, that is the new sample, S GO, was obtained. As a consequence the extended interlayer space has proved itself to be successfully intercalated by the surfactant.
