In N doped graphene Carbon is replaced by N in the graphitic structure. If it is same in case of N doped Graphene oxide then why oxygen containing functional groups are reduced as indicated by FTIR in literature?
The experimental procedure for doping is not described here. However, a simple doping in graphene or RGO could be surface adsorption at the vacancies and interstitial sites. It may not be any replacement but just addition of the N atoms. If carbon is replaced we have no more RGO. If we do some high energetic reaction, there is a possibilty that Oxygen functionalities go. FTIR provides a relative intensity. If Nitrogen is doped, the fraction of oxygen goes down.
Dear Ayesha Saleem ,
Mostly Carbon atom are replaced by nitrogen while doping. Some of the nitrogen can replace the carbon atom in a graphic hexagonal ring. In the literature you can find different type of nitrogen functionalities in the graphene hexagon sheet. I totally disagree with Mr. Shashank that " If carbon is replaced we have no more RGO." Very minimal number of carbon replaced by nitrogen atom.
During N-doped, in general we use high temperature which help to remove Oxygen functionalities from the graphene moieties and release as CO2 gas mainly. So in the FTIR is was observed that some of oxygen containing functional groups removed or intensity decreased.
Best Regards,
Bapi
In case of doping carbon atom at the backbone is replaced by Nitrogen atom
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