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dc.description.abstract구형의 고분자 코어를 지지체로 하여 바늘형 산화철 나노 입자를 키운 후 온도 조절을 통한 열처리 방식을 이용하여 다양한 구조를 같는 탄소 코어쉘(Core-shell) 형태의 산화철 나노 구조(Iron oxide nanoneedles, IO-NNs)를 합성하였다. 주사전자현미경(Scanning electron microscopy), 투과전자현미경(Transmission electron microscopy), X선 회절분석장치(X-ray diffractometer) 그리고 푸리에 변환 적외선 분광기(Fourier-transform infrared spectroscopy)를 이용하여 합성된 산화철 코어의 형태와 화학적 구조를 확인하였다. 만들어진 물질 중 탄소 코어가 있는 RE@IO-250은 UV-Vis 광선 하에서 6분 내에 99.7 %의 메틸렌 블루(Methylele blue), 27분 내에 99.5 %의 메틸 오렌지(Methyl orange)를 분해되는 뛰어난 광촉매 성능을 보여주었다. 또한 바늘형 산화철과 탄소 코어의 동반 효과(Synergistic effect)로 인하여 123.4 mg/g의 납(Lead(II))과 32.7 mg/g의 구리(Copper(II))를 흡착하는 좋은 중금속 흡착 성능을 보여주었다. 이렇게 합성된 탄소 코어쉘 바늘형 산화철 나노 구조는 독성이 강한 유기 오염물과 무기 오염물을 제거하는데 상당한 효율을 보이는 나노 입자가 될 것이라 믿는다.;Core-shell structured iron oxide nanoneedles (IO-NNs) with or without carbon core were synthesized by a temperature-controlled heat treatment of iron oxide nanoneedles grown on spherical polymer template. Morphologies and chemical structures of the IO-NNs was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffractometer (XRD) and fourier-transform infrared spectroscopy (FT-IR). The IO-NNs with carbon core (RE@IO-250) exhibited an excellent photocatalytic activity in the degradation of methylene blue (MB) and methyl orange (MO) under the sun-light irradiation, which showed the degradation efficiency of 99.7 % for the MB within 6 min and 99.5 % for MO within 27 min. In addition, due to a synergistic effect of IO nanoneedles and organic core RE@IO-250 showed a good removal efficiency for heavy metal ions, Pb(II) and Cu(II) showing adsorption capacities of 123.4 mg/g and 32.7 mg/g, respectively. We believe that the carbon core@iron oxide nanoneedle shell can be developed as one of promising candidates showing significant efficiency for removal of highly toxic materials.-
dc.description.tableofcontentsI. Introduction 1 II. Method 4 A. Materials 4 B. Preparation of RE 4 C. Preparation of RE/IO 5 D. Preparation of RE@IO-250, RE@IO-350, RE@IO-400 and RE@IO-500 5 E. Characterizations 5 F. Photocatalytic activity studies 6 G. Heavy metal removal studies 7 III. Results 9 A. Characterizations 9 B. Photocatalytic degradation of organic dyes 17 C. Heavy metal removal 22 D. Reuse test of RE@IO-250 28 IV. Conclusion 29 Bibliography 30 Abstract (in Korean) 35-
dc.format.extent5111442 bytes-
dc.publisher이화여자대학교 대학원-
dc.titleEffective removal of organic and inorganic pollutants with core-shell structured carbon@iron oxide nanoneedles-
dc.typeMaster's Thesis-
dc.format.pageviii, 36 p.-
dc.identifier.major대학원 화학·나노과학과- 8-
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