121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-391
Subject Hydrophobic cobalt–azolate frameworks: syntheses and applications in water purification
Authors Bhadra Biswa Nath, Sung Hwa JHUNG*
Department of Chemistry, Kyungpook National University, Korea
Abstract Two highly porous cobalt–azolate frameworks (MAF-5(Co) and MAF-6(Co)) were synthesized in pure-phase at room temperature. The MAF-5(Co) and MAF-6(Co) are isostructural with the previously reported MAF-5(Zn) and MFA-6(Zn). The precursors for the MAFs were mixed together in two different ways, e. g. slow and fast mixing method. Fast mixing method was observed as the most efficient method for synthesizing MAF(Co) materials in pure-phase with high yield. The obtained materials were characterized by measuring XRD patterns, N2-isotherms, SEM-images, water and n-octane adsorption capacity. The synthesized MAFs(Co) were highly porous and hydrophobic, similar to the analogous MAFs those composed of Zn. To find the applicability of newly developed materials, MAF-5(Co) and MAF-6(Co) were applied to adsorb n-octane as a model oil 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) together with a conventional adsorbent, activated carbon. Surprisingly, MAF-5(Co) showed remarkable competitiveness among the typical porous materials for n-octane removal, even with low porosity. However, better performance of MAF-6(Co) was observed for the adsorption of n-dodecane. It can be suggested from the obtained results that the framework structure including cavity and aperture sizes rather than surface area plays a vital role in the removal of hydrocarbon (n-octane or n-dodecane) from water. Moreover, MAF-5(Co) can be recycled easily by simple evaporation of the adsorbed n-octane and thereby suggested as a potential adsorbent for the removal of spilled oil from water. Additionally, the developed MAFs were also competitive for the adsorptive removal of diclofenac sodium from water, further suggesting as an impressive adsorbents in water purification probably on account of their hydrophobicity.
E-mail bbhadra07@yahoo.com