화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.15, No.1, 11-16, February, 2004
Export Citation
MCM-41의 표면 특성이 Cr(III)과 Cr(VI)의 흡착거동에 미치는 영향
Influence of Surface Properties of MCM-41 on Cr(III) and Cr(VI) Adsorption Behaviors
박수진†, 전병렬, J. Kawasaki1
  • 한국화학연구원 화학소재연구부, 대전 305-600
  • 1동경공업대학 화학공학과, 도쿄 152-8852
Soo Jin Park†, Byung-Ryul Jun, and Junjiro Kawasaki1
  • Advanced Materials Division, Korea Research Institute of Chemical Technology, Daejon 305-600, Korea
  • 1Department of Chemical Engineering, Tokyo Institute of Technology, Tokyo 152-8852, Japan
E-mail:
초록
본 연구에서는 실리카 원으로 colloidal silica를 이용하고, template로 cetyltrimethylammonium chloride (CTMACI)를 사용하여 MCM-41을 수열 합성하였다. MCM-41의 표면 성질과 구조는 pH, 산/염기도, FT-IR, XRD, 그리고 TEM을 이용하여 살펴보았다. 비표면적(SBET), 전체 기공부피(Vr), 그리고 평균 기공지름(DBJH)을 포함하는 N2등온 흡착 특성은 BET식과 de Boer의 t-plot을 이용하여 확인하였다. 또한, MCM-41의 Cr(III)와 Cr(VI) 흡착량은 ICP와 UV 분광기를 이용하여 측정하였다. 그 결과, MCM-41의 산도가 염기도 보다 더 높았으며, -OH, Si-OH, Si-O-Si와 같은 표면 작용기들을 IR로 확인할 수 있었다. N2등온 흡착 결과 SBET는 803 m2/g이었으며, 평균 기공 크기는 29 Å이었고, 벽 두께는 기공 크기와 a0의 차이로부터 22.5 Å임을 알 수 있었다. MCM-41의 Cr 이온 흡착온 용액의 pH 변화에 의존하였고, Cr(VI)보다 Cr(III)가 더 좋은 흡착 거동을 보였다.
In this work, MCM-41 mesoporous materials were prepared from hydrothermal synthesis using gel mixture of colloidal silica solution as silica source and cetyltrimethylammonium chloride (CTMACI) as a template. The surface and structure properties of MCM-41 were determined by pH, acid/base value, FT-IR, XRD, and TEM. N2adsorption isotherm characteristics, including the specific surface area (SBET), total pore volume (Vr), and average pore diameter (DBJH), were determined by BET and de Boer's t-plot methods. Also, the adsorption amounts of Cr(III) and Cr(VI) ion on MCM-41 were measured using ICP and UV spectrometer. As a result, the acidity of MCM-41 had higher than the basicity of one and surface functional groups, such as, -OH, Si-OH, Si-O-Si were observed by IR measurement. A SBET of 803 m2/g was determined from the N2 adsorption isotherm. Also, the average pore diameter of 29 Å was obtained and the wall thickness of the MCM-41, given by the difference of a0 and the pore diameter, was 22.5 Å. The adsorption of Cr ions on the MCM-41 become different depending on the pH of solution. The adsorption amount of Cr(III) on MCM-41 had higher than that of Cr(VI).
Keywords:MCM-41;hydroxyl group;surface properties;chromium ion;adsorption behaviors
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