Porous graphene frameworks pillared by organic linkers with tunable surface area and gas storage properties
Ram Kumar1, Venkata M Suresh, Tapas Kumar Maji
1International Centre for Material Science, Chemistry and Physics of Materials Unit and New Chemistry Unit, Jakkur, P.O., Bangalore-560064, India. tmaji@jncasr.ac.in.
Abstract:
We report the design and synthesis of two porous graphene frameworks (PGFs) prepared via covalent functionalization of reduced graphene oxide (RGO) with iodobenzene followed by a C-C coupling reaction. In contrast to RGO, these 3D frameworks show high surface area (BET, 825 m(2) g(-1)) and pore volumes due to the effect of pillaring. Interestingly, both the frameworks show high CO2 uptake (112 wt% for PGF-1 and 60 wt% for PGF-2 at 195 K up to 1 atm). PGFs show nearly 1.2 wt% H2 storage capacity at 77 K and 1 atm, increasing to ∼1.9 wt% at high pressure. These all carbon-based porous solids based on pillared graphene frameworks suggest the possibility of designing related several such novel materials with attractive properties.
