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HWAHAK KONGHAK,
Vol.41, No.6, 795-801, 2003
Vol.41, No.6, 795-801, 2003
무전해 구리도금에 의한 활성탄소의 NO 제거
NO Removal of Electrolessly Copper-plated Activated Carbons
본 연구에서는 활성탄소(activated carbons; ACs)의 표면에 무전해 도금 방법으로 Cu를 도입하여 Cu 도입시의 활성탄소의 기공특성 변화 및 Cu가 도입된 ACs를 이용한 NO 제거 반응에 대하여 고찰하였다. Cu가 도입된 ACs의 표면특성은 FT-IR과 scanning electron microscope (SEM)을 이용하여 관찰하였으며, N2/77 K 등온 흡착 특성은 BET식, D-R plot, H-K 및 BJH식을 이용하여 확인하였고, NO 제거효율은 가스크로마토그래프를 이용하여 분석하였다. 실험결과, 도금 시간이 증가함에 따라 ACs 표면의 Cu의 양은 점차 증가하였으나, ACs의 흡착 특성인 비표면적, 기공부피 등의 기공구조는 미약하게 감소하는 경향을 보였다. 반면 NO 제거효율은 도입된 Cu의 양이 증가함에 따라 비례적으로 증가하였으며, 이러한 결과는 ACs 표면에 도입된 Cu에 의해 Cu-ACs 표면에서의 NO 제거 반응이 가속되었기 때문으로 판단된다.
In this study, the activated carbons (ACs) containing copper metal were prepared by electroless copper plating technique, in order to remove NO. The surface and structural properties of the ACs were determined by FT-IR and scanning electron microscope (SEM), respectively. N2/77 K adsorption isotherm characteristics, including the specific surface area and pore volume, were investigated by BET, D-R plot, H-K, and BJH methods. And NO removal efficiency was confirmed by gas chromatographic technique. The copper content on ACs increased as the plating time increased. However, a slightly gradual decrease of adsorption properties, such as BET’s specific surface area and total pore volume, was observed in ACs in the presence of copper metal. NO removal efficiency of all Cu-ACs was higher than that of untreated ACs, and increased with the copper content on ACs. These results indicated that copper metal on Cu-ACs strongly accelerated catalytic reduction of NO on Cu-ACs surfaces, though it caused the decrease of the adsorption properties of original ACs.
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