Deoxygenation of Graphene Oxide: Reduction or Cleaning?

作者：Thomas Helen R; Day Stephen P; Woodruff William E; Valles Cristina; Young Robert J; Kinloch Ian A; Morley Gavin W; Hanna John V; Wilson Neil R^*; Rourke Jonathan P

来源：Chemistry of Materials, 2013, 25(18): 3580-3588.

DOI：10.1021/cm401922e

• graphene oxide
• chemically modified graphene
• oxidation debris
• reduction
• deoxygenation

We show that the two-component model of graphene oxide (GO), that is, composed of highly oxidized carbonaceous debris complexed to oxygen functionalized graphene sheets, is a generic feature of the synthesis of GO, independent of oxidant or protocol used. The debris present, roughly onethird by mass, can be removed by a base wash. A number of techniques, including solid state NMR, demonstrate that the properties of the base-washed material are independent of the base used and that it contains similar functional groups to those present in the debris but at a lower concentration. Removal of the oxidation debris cleans the GO, revealing its true monolayer nature and in the process increases the C/O ratio (i.e., a deoxygenation). By contrast, treating GO with hydrazine both removes the debris and reduces (both deoxygenations) the graphene sheets.

• 出版日期2013-9-24