Heteroatom-doped carbon gels from phenols and heterocyclic aldehydes: Sulfur-doped carbon xerogels

摘要: Abstract Sulfur-doped carbon xerogels were obtained through carbonization of resorcinol/2-thiophenecarboxaldehyde organic gels. The acid-catalyzed sol–gel polymerization resorcinol and 2-thiophenecarboxaldehyde leads to gels whose morphology texture is dependent on the amount catalyst used. As a result, monolithic with sulfur content up 19.6 wt.% easily tailored properties can be produced. After carbonization, substantial retained porous S-content 10 wt.% are produced (at 800 °C). Depending synthesis conditions, S-doped controllable enhanced mesoporosity, surface areas 670 m2/g mechanical integrity obtained. Additional KOH activation or enables production micro–mesoporous carbons 2550 m2/g while retaining over 5 wt.% sulfur. Preliminary CO2 adsorption measurements performed. On basis gel more general approach towards heteroatom-doped proposed: phenols heterocyclic aldehydes. Thus variety materials pore available via this procedure.