Abstract

The highly microporous graphene aerogel monolith of unidirectional textures is obtained from reduction and KOH activation of colloidal graphene oxide prepared with an ice-templating route. The free-standing geometry and well-aligned textures of graphene monolith are persevered even after an intensive KOH activation at 973K, although the frame structure is slightly disordered. The non-overestimated surface area of the KOH activated graphene monolith is 990m2g−1. The free-standing graphene aerogel monolith has predominant microporosity with appropriate macroporosity and a low bulk density of 8±0.5mgcm−3, being one of the lightest materials of the reported porous graphene materials.

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