120th General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Exhibition Hall 2+3
Time 10월 19일 (목요일) 11:00~12:30
Code MAT.P-384
Subject Synthesis of Hydrophobic Cobalt-Ethylimidazolate Frameworks and Their Possible Application in Cleaning of Contaminated Water
Authors Bhadra Biswa Nath, Sung Hwa JHUNG*
Department of Chemistry, Kyungpook National University, Korea
Abstract Phase-pure and high yield synthesis of two highly porous Co-based metal–azolate frameworks (MAFs), MAF-5(Co) and MAF-6(Co), which are isostructural with MAF-5(Zn) and MAF-6(Zn), respectively, were conducted at room temperature. Two mixing methods; slow and fast, were compared in the syntheses MAF-5(Co) and MAF-6(Co). The fast mixing of the reactant mixtures was found as the most effective for synthesizing MAF(Co) materials in pure-phase with high yield. The synthesized MAFs(Co) were found to be highly porous and very hydrophobic, similar to the MAFs composed of Zn, suggesting possible applications in water purification. To check the applicability, MAF-5(Co) and MAF-6(Co) were then applied to adsorb n-octane as a model oil and nonpolar adsorbate from water and the obtained results were compared to those of related materials, i.e., MAF-4(Co and Zn), MAF-5(Zn), and MAF-6(Zn), as well as with Cu-BTC (Cu-benzenetricarboxylate) and a conventional adsorbent, activated carbon. Surprisingly, even with low porosity, MAF-5(Co) showed remarkable competitiveness among the typical porous materials for n-octane removal. However, better performance of MAF-6(Co) was seen for the n-dodecane adsorption. The results suggest that the framework structure such as cavity and aperture sizes rather than surface area plays a significant role in the removal of hydrocarbon (n-octane or n-dodecane) from water. Moreover, MAF-5(Co) can easily be regenerated by simple evacuation and thus it can be suggested as a potential adsorbent for the removal of spilled oil from water. Additionally, the competitiveness of MAFs in the adsorption of diclofenac sodium from water, again suggesting as an good adsorbents in water purification probably because of hydrophobicity.
E-mail bbhadra07@yahoo.com