"C2N"-species have emerged as a promising material with carbon-like applications in sorption,gas separation and energy storage,while with much higher polarity and functionality.Controlled synthesis of"C..."C2N"-species have emerged as a promising material with carbon-like applications in sorption,gas separation and energy storage,while with much higher polarity and functionality.Controlled synthesis of"C2N"structure is still based on complex and less-sustainable monomers,which prohibits its broader industrial application.Here we report a class of well-defined C2(NxOySz)1 carbons with both high content of N/O/S heteroatoms and large specific surface area of up to 1704 m^2 g^-1,which can be efficiently synthesized through a simple additive condensation process using simple gallic acid and thiourea as the building blocks,without subtractive activation.This 1,4-para tri-doped C2(NxOySz)1 structure leads to sufficient CO2 adsorption capacity(3.0 mmol g^-1 at 273 K,1 bar)and a high CO2/N2 selectivity(47.5 for a 0.15/0.85 CO2/N2 mixture at 273 K).Related to the polarity,the polar frameworks can be used as supercapacitor electrodes,with record specific capacitances as high as 255 F g^-1 at 3.5 V for a symmetric supercapacitor in ionic liquid electrolyte.This work discloses a general way for preparing a novel family of multifunctional,high heteroatomdoped porous materials for various applications.展开更多
基金support provided by Zhengzhou University and the National Natural Science Foundation of China(51873198).
文摘"C2N"-species have emerged as a promising material with carbon-like applications in sorption,gas separation and energy storage,while with much higher polarity and functionality.Controlled synthesis of"C2N"structure is still based on complex and less-sustainable monomers,which prohibits its broader industrial application.Here we report a class of well-defined C2(NxOySz)1 carbons with both high content of N/O/S heteroatoms and large specific surface area of up to 1704 m^2 g^-1,which can be efficiently synthesized through a simple additive condensation process using simple gallic acid and thiourea as the building blocks,without subtractive activation.This 1,4-para tri-doped C2(NxOySz)1 structure leads to sufficient CO2 adsorption capacity(3.0 mmol g^-1 at 273 K,1 bar)and a high CO2/N2 selectivity(47.5 for a 0.15/0.85 CO2/N2 mixture at 273 K).Related to the polarity,the polar frameworks can be used as supercapacitor electrodes,with record specific capacitances as high as 255 F g^-1 at 3.5 V for a symmetric supercapacitor in ionic liquid electrolyte.This work discloses a general way for preparing a novel family of multifunctional,high heteroatomdoped porous materials for various applications.
