The search for new methodologies to obtain valuable nanoporous carbons from biomass residues is a hot research topic in material science. Several approaches have been assayed as it is the case of hydrothermal treatment of carbohydrates which allows the preparation of microspherical carbons with an incipient pore structure. To further develop the porosity and retain the spherical morphology, the choice of the activating agent is crucial and in recent studies we proved the potentialities of K2CO3 to obtain spherical activated carbons with tailored microporosity from a sucrose-derived biochar . The use of lignocellulosic biomass residues as source for carbohydrate units is however a more sustainable synthetic route and literature studies prove that activated carbon materials can been prepared from acid digestion of biomass followed by KOH-activation.
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