Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Synthesis of Mesoporous TiO2 Thin Films with Polypyrrole Nanoparticles by Ultrasonic-induced Polymerization

초음파 중합에 의한 polypyrrole 나노입자를 함유하는 메조포러스 TiO2 박막의 합성

  • Jang, Kwang-Suk (Department of Chemical and Biomolecular Engineering (BK21 Graduate Program), KAIST) ;
  • Cho, Sung-Ho (Samsung Electronics Co., Ltd.) ;
  • Song, Myung-Geun (Samsung Electronics Co., Ltd.) ;
  • Kim, Jong-Duk (Department of Chemical and Biomolecular Engineering (BK21 Graduate Program), KAIST)
  • Received : 2008.04.05
  • Accepted : 2008.05.26
  • Published : 2008.08.31
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Abstract

Using ultrasonic-induced polymerization of pyrrole, mesoporous $TiO_2$ thin film with polypyrrole nanoparticles was prepared. Polypyrrole nanoparticles were ultrasonically synthesized in the mother solution of mesoporous $TiO_2$ before spin-coating. The polypyrrole particles were well dispersed in the solution. After spin-coating and calcinations process, the nanocomposite films have well-organized pore channels without pore-collapse, and polypyrrole nanoparticles are well dispersed in mesoporous $TiO_2$ matrix. The pore size and light absorbance of the mesoporous nanocomposite thin films were controlled by using different template materials, and by using different amount of pyrrole monomer, respectively.

초음파 중합법을 이용하여 pyrrole을 중합시킴으로써 polypyrrole 나노입자를 합유하는 메조포러스 $TiO_2$ 박막을 합성하였다. 메조포러스 $TiO_2$ 박막을 만들기 위한 $TiCl_4$-계면활성제 용액에 pyrrole을 넣어주고 초음파 중합시킴으로써 용액 내에 polypyrrole 나노입자들이 잘 분산된 형태로 만들어졌다. 이 용액을 이용하여 spin-coating과 열처리를 함으로써 polypyrrole 나노입자를 합유하는 메조포러스 $TiO_2$ 박막을 제조하였다. 열처리 후에도 기공 구조는 잘 유지되었으며, polypyrrole 나노입자들이 박막 내에 잘 분산되었다. 주형물질인 계면활성제의 종류와 pyrrole의 양을 조절함으로써, 합성된 박막의 기공 크기와 빛의 흡광도를 조절하였다.

Keywords

Acknowledgement

Supported by : 한국과학재단

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