title: Nitrogen-Doped Porous Carbons from Ionic Liquids@MOF: Remarkable Adsorbents for Both Aqueous and Nonaqueous Media.
abstract: Porous carbons were prepared from a metal-organic framework (MOF, named ZIF-8), with or without modification, via high-temperature pyrolysis. Porous carbons with high nitrogen content were obtained from the calcination of MOF after introducing an ionic liquid (IL) (IL@MOF) via the ship-in-bottle method. The MOF-derived carbons (MDCs) and IL@MOF-derived carbons (IMDCs) were characterized using various techniques and used for liquid-phase adsorptions in both water and hydrocarbon to understand the possible applications in purification of water and fuel, respectively. Adsorptive performances for the removal of organic contaminants, atrazine (ATZ), diuron, and diclofenac, were remarkably enhanced with the modification/conversion of MOFs to MDC and IMDC. For example, in the case of ATZ adsorption, the maximum adsorption capacity of IMDC (Q0= 208 m2/g) was much higher than that of activated carbon (AC, Q0= 60 m2/g) and MDC (Q0= 168 m2/g) and was found to be the highest among the reported results so far. The results of adsorptive denitrogenation and desulfurization of fuel were similar to that of water purification. The IMDCs are very useful in the adsorptions since these new carbons showed remarkable performances in both the aqueous and nonaqueous phases. These results are very meaningful because hydrophobic and hydrophilic adsorbents are usually required for the adsorptions in the water and fuel phases, respectively. Moreover, a plausible mechanism, H-bonding, was also suggested to explain the remarkable performance of the IMDCs in the adsorptions. Therefore, the IMDCs derived from IL@MOF might have various applications, especially in adsorptions, based on high porosity, mesoporosity, doped nitrogen, and functional groups.
authors.affiliation: Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University , Daegu 41566, Republic of Korea.
authors.forename: Imteaz
authors.initials: I
authors.lastname: Ahmed
authors.affiliation: Department of Energy Systems Engineering, DGIST , Daegu 42988, Republic of Korea.
authors.forename: Tandra
authors.initials: T
authors.lastname: Panja
authors.affiliation: Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University , Daegu 41566, Republic of Korea.
authors.forename: Nazmul Abedin
authors.initials: NA
authors.lastname: Khan
authors.affiliation: Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University , Daegu 41566, Republic of Korea.
authors.forename: Mithun
authors.initials: M
authors.lastname: Sarker
authors.affiliation: Department of Energy Systems Engineering, DGIST , Daegu 42988, Republic of Korea.
authors.forename: Jong-Sung
authors.identifier: http://orcid.org/0000-0002-8805-012X
authors.initials: JS
authors.lastname: Yu
authors.affiliation: Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University , Daegu 41566, Republic of Korea.
authors.forename: Sung Hwa
authors.identifier: http://orcid.org/0000-0002-6941-1583
authors.initials: SH
authors.lastname: Jhung
keywords: H-bonding; MOF-derived carbons; liquid phase adsorption; metal−organic frameworks; nitrogen doping; pyrolysis of MOFs