Tigany Zarrouk

Surface area and porosity are critical factors that significantly influence the electrochemical performance of HC. Therefore, N 2 adsorption–desorption measurement was used to investigate the samples’ textural properties. As shown in Figure 2 a, BC 1200 exhibits the highest N 2 uptake, displaying a type-IV isotherm with a hysteresis loop at high relative pressure and indicating a complex macro-/mesoporous structure that is also rich in micropore.

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Graphene oxide (GO) is a summary term for a range of layered materials created by reacting graphite with aggressive agents, such as KMnO4, typically followed by partial reduction and sometimes functionalisation.1-4 Today, GO materials can be controllably prepared5 and find emerging applications in catalysis,6 membranes,7 electronics,8 and photonics.9 Despite decades of work, however, the precise chemical structure of these materials has remained elusive.