Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Fabrication of Photocatalyst Glass Beads Coated with TiO2 Thin Film by a Layer-by-Layer Process

LBL법에 의해 TiO2막이 코팅된 광촉매 글라스 비드 제조

  • Lee, Ji-Sun (Korea Institute of Ceramic Engineering and Technology, Electronic & Optic Material Center) ;
  • Chae, Yoo-Jin (Korea Institute of Ceramic Engineering and Technology, Electronic & Optic Material Center) ;
  • Lee, Mi-Jai (Korea Institute of Ceramic Engineering and Technology, Electronic & Optic Material Center) ;
  • Kim, Sei-Ki (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) ;
  • Lim, Tae-Young (Korea Institute of Ceramic Engineering and Technology, Electronic & Optic Material Center) ;
  • Hyun, Soong-Keun (Department of Materials science and Engineering, Inha University) ;
  • Kim, Jin-Ho (Korea Institute of Ceramic Engineering and Technology, Electronic & Optic Material Center)
  • 이지선 (한국세라믹기술원 전자.광소재센터) ;
  • 채유진 (한국세라믹기술원 전자.광소재센터) ;
  • 이미재 (한국세라믹기술원 전자.광소재센터) ;
  • 김세기 (한국세라믹기술원 전자.광소재센터) ;
  • 황종희 (한국세라믹기술원 전자.광소재센터) ;
  • 임태영 (한국세라믹기술원 전자.광소재센터) ;
  • 현승균 (인하대학교 금속공학과) ;
  • 김진호 (한국세라믹기술원 전자.광소재센터)
  • Received : 2012.06.18
  • Accepted : 2012.07.05
  • Published : 2012.07.27
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Abstract

$TiO_2$ thin films consisting of positively charged poly(diallyldimethylammonium chloride)(PDDA) and negatively charged titanium(IV) bis(ammonium lactato) dihydroxide(TALH) were successfully fabricated on glass beads by a layer-by-layer(LBL) self-assembly method. The glass beads used here showed a positive charge in an acid range and negative charge in an alkaline range. The glass beads coated with the coating sequence of(PDDA/TALH)n showed a change in the surface morphology as a function of the number of bilayers. When the number of bilayers(n) of the(PDDA/TALH) thin film was 20, Ti element was observed on the surface of the coated glass beads. The thin films coated onto the glass beads had a main peak of the (101) crystal face and were highly crystallized with XRD diffraction peaks of anatase-type $TiO_2$ according to an XRD analysis. In addition, the $TiO_2$ thin films showed photocatalytic properties such that they could decompose a methyl orange solution under illumination with UV light. As the number of bilayers of the(PDDA/TALH) thin film increased, the photocatalytic property of the $TiO_2$-coated glass beads increased with the increase in the thin film thickness. The surface morphologies and optical properties of glass beads coated with $TiO_2$ thin films with different coating numbers were measured by field emission scanning electron microscopy(FE-SEM), X-ray diffraction(XRD) and by UV-Vis spectrophotometry(UV-vis).

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References

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