Abstract
Graphene with tuned surface area has been prepared by combustion synthesis (CS) from the reaction between Mg powders and CO2 gas. The content of the MgO diluent has an important influence on the morphology, crystallinity, surface properties, and thus adsorption performance of the prepared graphene. Graphene exhibits a macroporous microstructure with a broad pore size distribution and is abundant in wrinkles and ripples. From adsorption experiments, methyl orange (MO) molecules can be effectively removed by the graphene. The adsorption data fit the Langmuir isotherm well and the adsorption kinetics follows the pseudo-second-order rate reaction.
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