Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Reproducible Synthesis of Periodic Mesoporous TiO2 Thin Film

재현성 있는 메조포러스 TiO2 박막의 제조에 대한 연구

  • Hur, Jae Young (Department of Environmental Engineering, University of Seoul) ;
  • Lee, Hyung Ik (Department of Chemistry, Sungkyunkwan University) ;
  • Park, Young-Kwon (Faculty of Environmental Engineering, University of Seoul) ;
  • Joo, Oh-Shim (Environment & Process Technology Division, Korea Institute of Science and Technology) ;
  • Bae, Gwi-Nam (Environment & Process Technology Division, Korea Institute of Science and Technology) ;
  • Kim, Ji Man (Department of Chemistry, Sungkyunkwan University)
  • 허재영 (서울시립대학교 환경공학과) ;
  • 이형익 (성균관대학교 화학과) ;
  • 박영권 (서울시립대학교 환경공학부) ;
  • 주오심 (한국과학기술연구원 환경공정연구부) ;
  • 배귀남 (한국과학기술연구원 환경공정연구부) ;
  • 김지만 (성균관대학교 화학과)
  • Received : 2006.07.04
  • Accepted : 2006.07.13
  • Published : 2006.08.31
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Abstract

There has been numerous reports for the synthesis of mesoporous $TiO_2$ thin films due to not only the high surface area and regular mesoscale pores but also wide band gap and photo activity. However, the synthesis has been restricted by the limited reproducibility mainly due to the extraordinarily fast hydrolysis and condensation rate of titania precursors. In this report, molar composition of reaction batch (HCl/Ti and Ti/P123) and exterior condition (humidity and temperature) during coating and anealing process. Thereafter, the mesoporous $TiO_2$ thin films were characterized by XRD and TEM

현재 넓은 표면적과 메조기공 뿐만 아니라 $TiO_2$의 넓은 band gap과 그 광학 활성 등으로 인하여 크게 각광받고 있는 메조포러스 $TiO_2$ 박막을 합성하기 위해 여러 가지 합성방법이 제시되고 있으나, 그 합성이 습도나 온도 등의 여러조건에 따라 크게 영향을 받아 재현성이 떨어진다는 치명적인 문제점이 제기되어 왔다. 이는 합성 용액 내에서 $TiO_2$ 전구체가 가수분해 및 축합반응을 하면서 구조유도체와의 자기조립에 의한 나노구조물 형성하는 과정에서 $TiO_2$의 전구체가 온도나 습도 등 주변의 영향을 많이 받기 때문이다. 본 연구에서는 2차원 구조의 메조기공을 가진 $TiO_2$ 박막을 재현성 있게 얻을 수 있는 실험 조건을 찾고자 하였다. 이를 위해 촉매인 HCl과 $TiO_2$ 전구체의 몰비 그리고 $TiO_2$ 전구체와 P-123의 몰비 등의 합성 조건뿐 아니라 코팅과정 도중이나 이후의 습도와 온도가 미치는 영향에 대한 실험을 수행하였고 그 특성을 XRD와 TEM 등으로 분석하였다.

Keywords

Acknowledgement

Supported by : 한국과학기술연구원

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