Microwave Enabled One-Pot, One-Step Fabrication and Nitrogen Doping of Holey Graphene Oxide for Catalytic Applications

By taking advantage of the unique heating mechanism of microwave, we developed a fast and low temperature approach to simultaneously reduce and dope graphene oxide sheets with nitrogen

Mehulkumar Patel

2015

Scholarcy highlights

  • The ever-increasing global depletion of fossil resources and their environmental impacts stimulate intense research activities in the development of alternative green and sustainable energy resources
  • It is likely due to the existence of nanoholes, which provides “short cut” for efficient mass transport and creates more catalytic centers due to the increased surface area and edges associated with the nanoholes in the N-HrGO-10
  • We found that by including KMnO4 in the reaction system, and by adjusting microwave irradiation time and amount of KMnO4, the etching/consumption of the generated defective carbons can be controlled, so that graphene oxide sheets with controlled hole structures can be directly fabricated from graphite powder in one step
  • FT-IR, and X-ray photoelectron spectroscopy characterization, we found that this process graphene oxide was reduced during N-doping, the ID/IG ratio would not results in simultaneous N-doping and reduction of GO/holey GO. decrease, which is in contrast to the scenario of reduction of
  • The existence of the nanoholes provides a “short cut” for efficient mass transport, and creates more catalytic centers due to the increased surface area and edges associated with the nanoholes
  • We experimentally measure the effective diffusion constant of O2 for N-HrGO-10 and N-reduced GO-10, which quantitatively demonstrates that the hole structures on the basal plane of graphene contributed to the enhanced diffusion of oxygen in N-HrGO-10
  • The capability for rapid fabrication and N-doping of holey graphene oxide can lead us to develop efficient catalysts which can replace precious coin metals for energy generation and storage, such as fuel cells and metal–air batteries

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