Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Synthesis, Characterization, and Catalytic Applications of Fe-MCM-41

Fe-MCM-41의 제조, 물성조사 및 촉매적 응용 연구

  • 윤상순 (인하대학교 공과대학 화학공학과) ;
  • 최정식 (인하대학교 공과대학 화학공학과) ;
  • 최형진 (인하대학교 공과대학 고분자공학과) ;
  • 안화승 (인하대학교 공과대학 화학공학과)
  • Received : 2004.09.22
  • Accepted : 2004.12.10
  • Published : 2005.04.30
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Abstract

A Fe-containing mesoporous silica (Fe-MCM-41) in which part of Si in the framework was replaced by Fe(Si-O-Fe) has been successfully prepared using $Fe^{3+}$ salt by a direct synthesis route. Physical properties of the material were characterized by XRD, $N_2$ adsorption, SEM/TEM, UV-vis and FT-IR spectroscopies. Fe-MCM-41 exhibited high catalytic activity in phenol hydroxylation using $H_2O_2$ as oxidant, giving phenol conversion of ca. 60% at $50^{\circ}C$ [phenol : $H_2O_2$ = 1:1, water solvent]. Fe-MCM-41 was also applied to the growth of CNTs, utilizing a thermal-CVD reactor using acetylene gas, which demonstrated that multi-wall CNTs could be prepared efficiently using the Fe-MCM-41 catalyst.

실리카계 메조 물질인 MCM-41의 합성시 $Fe^{3+}$ 염을 합성 기질에 직접 도입하여 구조 내의 Si를 Fe로 일부 치환시킨 Fe-MCM-41(4 mol% Fe)을 합성하였다. XRD, $N_2$ 흡착법, TEM 등으로 합성한 메조 세공 물질의 구조적 특성을 조사하였으며, UV-Vis 및 FT-IR 등의 분광분석을 통하여 철의 상태를 확인하였다. 촉매적 활성 연구를 위하여 과산화수소를 산화제로 이용한 phenol hydroxylation을 수행하였으며, 물을용매로 반응 온도 $50^{\circ}C$, phenol:$H_2O_2$=1:1 조건에서 ca. 60%의 전화율을 얻었다. 또한, 구조 중 Fe 활성점을 이용한 탄소 나노 튜브의 성장 가능성을 확인하기 위하여, 아세틸렌가스를 탄소원으로 사용한 thermal-CVD 반응기를 이용하였으며, 다중벽 탄소 나노 튜브를 제조할 수 있었다.

Keywords

Acknowledgement

Supported by : 한국과학재단

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