“…Surface functionalization of ACFs is often realized through the addition of oxygen functional groups such as phenolic, carboxylic or lactonic groups or through nitridation to add amines, amides or pyridines groups. Several methods have been developed, such as chemical oxidation [260][261][262][263], nitridation [264,265], plasma treatment (oxygen [266,267] or nitrogen [268]), halogenation [269,270], gamma-ray irradiation [271] or electrochemical oxidation [272,273]. Whereas wall decoration is well adapted for enhancing gas sorption (CO 2 , SO 2 ) [260,268], the decomposition of trapped species needs the presence of an embedded active material such as metal oxide nanoparticles within the framework [175,274].…”