Triple hierarchical micro-meso-macroporous carbonaceous foams bearing highly monodisperse macroporosity

The limited coalescence phenomenon occurring in Pickering emulsions stabilized by solid particles allows preparing monolithic silica foams with nearly monodisperse macroscopic voids and also meso- and microporosities. After soaking of these foam hard templates with a phenolic resin, partially graphitized interconnected porous carbon monoliths can be obtained easily. Like the silica templates, these carbon monoliths possess a hierarchical, triple porosity. Mercury intrusion porosimetry reports a macropore volume fraction of 45-70% with a narrow pore size distribution, while their specific surface area values lie between 700 and 900 m2 g−1 and their mesopore specific surface area between 200 and 500 m2 g−1. This approach allows preparing hierarchical porous carbon whose mesoporosity does not require using any soft template to organize the resin precursor.