Various N-doped hierarchical porous carbons were prepared by using a new mixed-ligand ZIF(zeolitic imidazolate framework)(JUC-160)as the precursor in a one-step synthetic route without any additional carbon sources or...Various N-doped hierarchical porous carbons were prepared by using a new mixed-ligand ZIF(zeolitic imidazolate framework)(JUC-160)as the precursor in a one-step synthetic route without any additional carbon sources or purification steps.The effect of the ZIF precursor crystal size on the textural properties of the derived porous carbons was systematically studied.Microporosity was dominant in micron-sized JUC-160 crystal derived porous carbons,while more mesopore volume was present in porous carbons obtained from nanometre-sized JUC-160 crystals.The mJUC160-900 sample,which had a high nitrogen content and micropore volume,exhibited the highest CO_(2) uptake,which is 5.50 and 3.50 mmol g^(-1) at 273 and 298 K,respectively.Moreover,the analysis based on the ideal adsorbed solution theory(IAST)exhibited a high adsorption selectivity for CO_(2)/N_(2) at 298 K and 1 bar(Sads=29).展开更多
基金supported by the National Natural Science Foundation of China(21390394,21571076,21571079,and 21261130584)the“111”project(B07016)the Guangdong Science and Technology Department Project(2009B090300432).
文摘Various N-doped hierarchical porous carbons were prepared by using a new mixed-ligand ZIF(zeolitic imidazolate framework)(JUC-160)as the precursor in a one-step synthetic route without any additional carbon sources or purification steps.The effect of the ZIF precursor crystal size on the textural properties of the derived porous carbons was systematically studied.Microporosity was dominant in micron-sized JUC-160 crystal derived porous carbons,while more mesopore volume was present in porous carbons obtained from nanometre-sized JUC-160 crystals.The mJUC160-900 sample,which had a high nitrogen content and micropore volume,exhibited the highest CO_(2) uptake,which is 5.50 and 3.50 mmol g^(-1) at 273 and 298 K,respectively.Moreover,the analysis based on the ideal adsorbed solution theory(IAST)exhibited a high adsorption selectivity for CO_(2)/N_(2) at 298 K and 1 bar(Sads=29).
