| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1504503 | Solid State Sciences | 2014 | 4 Pages |
•Ammonium hydroxide reduced graphene oxide.•Colloidal suspensions of N-modified graphene nano-platelets were produced.•Macroscopic paper materials showed good electrical conductivity.
The production of colloidal suspensions of graphene-based nano-platelets in large scale is highly important for their use in practical applications. In this work, we developed a new route for generation of colloidal suspensions of N-modified graphene-based nano-platelets (A-rG-O) with high concentration in water or organic solvent/water mixed systems by the reaction between graphene oxide and ammonium hydroxide. Graphene oxide was reduced by the ammonium hydroxide and N atoms (up to 6 at%) were introduced into A-rG-O materials using solution process without further thermal treatment. Such A-rG-O nano-platelets were well dispersed as individual layers in both systems. Macroscopic free-standing A-rG-O paper materials with good electrical conductivity were produced by filtration of such colloidal suspensions.
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