Abstract
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•Investigation of graphene oxide (GO) for CO2 storage.•Doubling of CO2 uptake capacity by optimization of synthesis and processing steps of GO.•Benchmark of results against standard materials.
The influence of the synthesis route on the surface characteristics and CO2 uptake of graphene oxide was studied. Powders derived from the classical Hummer’s method approach and the so-called improved Hummer’s method were benchmarked against zeolite 13X and certified carbon nanotubes. With a specific surface area of 283 m2 g−1 and a CO2 adsorption capacity of 2.1 mmol g−1 (at 273 K), the improved Hummer’s product was superior to the other two nanocarbons tested.