Zeolites模板法制备氮掺杂多孔碳材料及其CO_2吸附性能

Preparation and Performance of CO_2 Adsorption of N-doped Porous Carbons by Zeolites-template Method

以吡咯为碳源和氮源,分子筛为模板剂,通过模板法制备了氮掺杂多孔碳材料(NPCs),研究了碳源与模板剂质量比对NPCs的孔隙结构、氮元素含量及其对CO_2吸附性能的影响。采用全自动气体吸附仪、扫描电镜、透射电镜及X光射线电子能谱分析仪对NPCs的孔隙结构、形貌及元素组成进行了表征,并在常温常压下采用静态吸附法对CO_2吸附性能进行了测试。结果表明:当碳源与模板剂质量配比为0.5时,所制备NPCs的比表面积为660 m^2/g,平均孔径为536 nm,总孔容为0.883 cm^3/g,微孔孔容达0.130 cm^3/g,微孔包含的超微孔所占比例更大,对CO_2有最高吸附量84.26 mg/g(298 K,0.1 MPa)。

In this work,N-doped porous carbons(NPCs)were prepared containing pyrrole as carbon and nitrogen source and using FeCl 3 as catalyst by zeolites-template method.Pore structure and morphology of NPCs were revealed by specific surface analysis,scanning electron microscope(SEM),and transmission electron microscope(TEM).Elements composition were represented by X-ray photoelectron spectroscopy(XPS),while the capacity of CO 2 adsorption of NPCs was characterized by static adsorption method.The results indicated that the prepared NPCs with the mass ratio of 0.5(catalyst/template)exhibited the highest adsorption capacity of 84.26 mg/g(298 K,1 bar)for CO 2 adsorption,which covers 660 m 2/g of specific surface area,536 nm of average pore size,0.883 cm 3/g of total pore volumes especially higher micropore volumes of 0.130 cm 3/g.The process of the method will be utilized efficiently in capture of CO 2 with promising prospect.