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자료유형
동향자료
저자정보
Yuan, Hui (Department of Chemical Engineering, College of Engineering, Yanbian University) Meng, Long-Yue (Department of Chemical Engineering, College of Engineering, Yanbian University) Park, Soo-Jin (Department of Chemistry, Inha University)
저널정보
한국탄소학회 Carbon letters Carbon letters 제19권
발행연도
2016.1
수록면
99 - 103 (5page)

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Porous carbons have attracted much attention for their novel application in gas storage. In this study, porous graphite nano-fiber (PGNFs)-based graphite nano fibers (GNFs) were prepared by KOH activation to act as adsorbents. The GNFs were activated with KOH by changing the GNF/KOH weight ratio from 0 through 5 at 900&#x2103;. The effects of the GNF/KOH weight ratios on the pore structures were also addressed with scanning electron microscope and N<sub>2</sub> adsorption/desorption measurements. We found that the activated GNFs exhibited a gradual increase of CO<sub>2</sub> adsorption capacity at CK-3 and then decreased to CK-5, as determined by CO<sub>2</sub> adsorption isotherms. CK-3 had the narrowest micropore size distribution (0.6&#x2013;0.78 nm) among the treated GNFs. Therefore, KOH activation was not only a significant method for developing a suitable pore-size distribution for gas adsorption, but also increased CO<sub>2</sub> adsorption capacity as well. The study indicated that the sample prepared with a weight ratio of &#x2018;3&#x2019; showed the best CO<sub>2</sub> adsorption capacity (70.8 mg/g) as determined by CO<sub>2</sub> adsorption isotherms at 298 K and 1 bar.

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