Supporting information Free Standing Graphene Oxide Paper: New Polymer Electrolyte for Polymer Electrolyte Fuel Cells
نویسندگان
چکیده
Graphite oxide was synthesized from natural flake graphite by the modified Hummers method. In brief, 200 mg of Graphite particles were immersed in Concentrated sulfuric acid (46 ml) and KMnO4 (6 g) was added slowly in small quantities in which temperature was maintained between the 0 and 5 c using an ice bath, after the complete oxidation of KMnO4, the mixture was heated to 37 c and kept at this temperature about 30 min. Then 12 ml of distilled water added slowly to this mixture then temperature of mixture is raised to 95 c and it is maintained for about 15 min, this mixture was further diluted with 280 ml of water and later 20 ml of 30% H2O2 was added and left for 5 min, then solid was filtered off and washed with 5% HCl until filtrate was free from sulphate ions. GO thus obtained was further washed thoroughly with water and dried in air for 24 hours.
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