Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Properties of TiO2 thin films fabricated with surfactant by a sol-gel method

Sol-gel 법에 의하여 제조된 계면활성제 첨가 TiO2 박막 특성

  • Kim, Jin-Ho (Korea Institute of Ceramic Engineering and Technology, Electronic & Optic Material Center) ;
  • Jung, Hyun-Ho (Korea Institute of Ceramic Engineering and Technology, Electronic & Optic Material Center) ;
  • Hwang, Jong-Hee (Korea Institute of Ceramic Engineering and Technology, Electronic & Optic Material Center) ;
  • Cho, Yong-Seok (Beebong E&G Co., Ltd.) ;
  • Lim, Tae-Young (Korea Institute of Ceramic Engineering and Technology, Electronic & Optic Material Center)
  • 김진호 (한국세라믹기술원 전자.광소재센터) ;
  • 정현호 (한국세라믹기술원 전자.광소재센터) ;
  • 황종희 (한국세라믹기술원 전자.광소재센터) ;
  • 조용석 ((주)비봉E&G) ;
  • 임태영 (한국세라믹기술원 전자.광소재센터)
  • Received : 2010.10.28
  • Accepted : 2010.12.03
  • Published : 2010.12.31
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Abstract

Super hydrophilic and high transparent $TiO_2$ thin films were successfully fabricated by sol-gel method without an irradiation of UV light. In addition, surfactant Tween 80 was used for increasing the transmittance of the thin films. When the contents of Tween 80 in $TiO_2$ solution were 0.0, 1.0, 3.0, 5.0 wt%, the transmittance of $TiO_2$ thin films was ca. 74.31%, 74.25%, 79.69%, 81.99% at 550 nm wavelength, respectively. The contact angles of fabricated $TiO_2$ thin films with or without Tween 80 were from ca. $4.0^{\circ}$ to $4.5^{\circ}$. The $TiO_2$ thin films annealed over $400^{\circ}C$ showed anatase crystal structure and the photocatalytic property that decomposed methyl orange with UV irradiation. The surface morphologies, optical properties and contact angle of prepared thin films with different contents of Tween 80 were evaluated by field emission scanning electron microscope (FE-SEM), X-ray diffratometer (XRD), UV-Vis spectrophotometer and contact angle meter.

Sol-gel법을 이용하여 초친수성이며 높은 투과율을 갖는 $TiO_2$ 박막을 UV를 조사하지 않고 제조하였다. 제조된 박막의 투과율을 높이기 위하여 계면활성제 Tween 80을 첨가하였다. $TiO_2$ 용액에서 Tween 80의 함량이 0.0, 1.0, 3.0, 5.0 wt%일 때, 파장 550 nm에서 측정된 $TiO_2$ 박막의 투과율은 각각 약 74.31%, 74.25%, 79.69%, 81.99%였다. Tween 80의 첨가유무에 따라 제조된 박막은 약 $4.0{\sim}4.5^{\circ}$의 초친수 접촉각을 나타내었다. $400^{\circ}C$ 이상에서 열처리된 $TiO_2$ 박막은 아나타제 타입의 결정구조를 보였으며, UV를 조사하였을 때 메틸 오렌지 용액을 분해시키는 광촉매 특성을 보였다. Tween 80의 함량에 따라 제조된 박막의 표면구조, 광학특성 및 접촉각을 FE-SEM, XRD, UV-Vis 분광기, 접촉각 측정기를 이용하여 평가하였다.

Keywords

Acknowledgement

Supported by : 한국세라믹기술원

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