Professor Petit’s group designs, synthesises, characterises and tests porous materials (i.e. sorbents) that can address separation challenges related to environmental, water and energy sustainability. When relevant and possible, they confer our materials a catalytic property in addition to their sorptive nature as a way to intensify processes. This leads to the creation of multifunctional materials. The main focus is on porous nitrides (i.e. boron nitride and carbon nitride), metal organic frameworks and composites thereof for applications in molecular separations and solar energy conversion