Graphene oxide: efficiency of reducing agents

We focus on the surface quality of reduced graphene oxide

Siegfried Eigler; Stefan Grimm; Michael Enzelberger-Heim; Paul Müller; Andreas Hirsch

2013

Scholarcy highlights

  • The efficiency of reducing agents for the reduction of graphene oxide could be probed by scanning Raman spectroscopy
  • We focus on the surface quality of reduced GO
  • By using scanning Raman spectroscopy we can determine the effectiveness of reducing agents and in addition we focus on the surface quality which is of great importance
  • We found that plotting the ratio of the intensity of the D peak and the G peak vs. G of the 2D peak makes the differences in yielded quality of reduced GO-n visible
  • 32 cmÀ1 on SiO2.30 We find that it varies between 32 cmÀ1 and 200 cmÀ1 for rGO-n depending on the reduction method
  • We show that probing the graphene quality by scanning Raman spectroscopy can result in visible enhancements in the preparation of rGO-n, as shown for an optimized film that could be identified as a film of graphene flakes
  • Reduction that comes along with carbon-loss appears to be worse compared to reducing agents such as hydrazine

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