DOI QR코드

DOI QR Code

졸-겔법을 이용한 TiO2 박막의 광촉매 특성

Photo-catalytic Characteristics of Sol-Gel Synthesized TiO2 Thin Film

  • 최규만 (관동대학교 전자정보통신공학부) ;
  • 김여환 (관동대학교 전자정보통신공학부) ;
  • 임해진 (강원대학교 전자정보통신공학부)
  • Choi, Kyu-Man (School of Electronics & Information Communication Engineering, Kwandong University) ;
  • Kim, Yeo-Hwan (School of Electronics & Information Communication Engineering, Kwandong University) ;
  • Lim, Hae-Jin (Division of Electronic and Information Communication Engineering, Kangwon National University)
  • 투고 : 2012.11.05
  • 심사 : 2013.02.06
  • 발행 : 2013.02.28

초록

$TiO_2$ 박막을 저온 열처리 졸-겔 법으로 합성하였다. 박막의 기판은 면적이 $100mm^2$인 붕규산염 유리를 사용하여 시료를 $300^{\circ}C$부터 $1100^{\circ}C$까지 열처리하였고, 이때 제조된 박막의 두께는 약 $1.5{\mu}m$정도였다. $300^{\circ}C$에서 2시간 동안 열처리한 $TiO_2$ 박막은 아나타제 상을 나타내었고 열처리 온도가 증가함에 따라 비정질 상태에서 아나타제상과 루타일 상이 공존하면서 각 상의 분율이 변화하였다. SEM 분석에 의하면 박막의 입자 크기는 $0.1{\sim}0.54{\mu}m$이었으며 Uv-visible 반사특성에 있어서 390nm부근에서 광흡수가 되는 것을 알 수 있었다. 따라서 낮은 열처리 온도에서 생성된 $TiO_2$ 박막은 주로 아나타제 상을 가지며 광촉매 특성을 2.4배 증가시키는 것으로 나타났다.

Thin film of $TiO_2$ was obtained by the sol-gel dip method on the brosilicate glass substrate. It was found that the film was about $1.5{\mu}m$ thick as obtained by 4 successive coatings and annealed at varied temperatures ranged from $300^{\circ}C$ to $1100^{\circ}C$ for 2 hrs. The substrate used was having the surface area of $100mm^2$. Increasing the annealing temperature caused to change in mineralogical phase of titanium oxide i.e., amorphous, crystalline antase to rutile phases. The particle size of the titanium oxide film were ranged from $0.1{\sim}0.54{\mu}m$ estimated by the SEM analysis. The material showed an absorbance maximum at the wavelength 390nm obtained by UV-visible spectrophotometer. These results therefore, indicated that the $TiO_2$ film obtained relatively at low annealing temperature consisted predominantly with anatase phase; possessed higher photocatalytic behavior i.e., 2.4 times higher than that of only UV lamp irradiation.

키워드

참고문헌

  1. P. Kajitvichyanukul et al. "Sol-gel preparation and properties study of $TiO_2$ thin film for photocatalytic reduction of chromium(VI) in photocatalysis process," Science and Technology of Advanced Materials, 6 (2005) 352-358 DOI: http://dx.doi.org/10.1016/j.stam.2005.02.014
  2. Doh, S.J., Kim, C., Lee, S.G., Lee, S.J., Kim, H.Y., 2007. Immobilization study of $TiO_2$ photocatalyst for the treatment of organic pollutants. Theories and Applications of Chem. Eng.,13,1168-1171.
  3. Kim, S. M., Yun, T. K., and Hong, D. I., "Effect of Rutile Structure on $TiO_2$ Photocatalytic Activity," Journal of the Korean Chemical Society 2005, Vol. 49, No. 6 https://doi.org/10.5012/jkcs.2005.49.6.567
  4. Boschloo, G. K.; Goossens, A.; Schoonman, J. J. Electroanal. Chem. 1997, 428, 25. DOI: http://dx.doi.org/10.1016/S0022-0728(97)00037-5
  5. S. M. Kim, etal,"Effect of Rutile Structure on $TiO_2$ Photocatalytic Activity," Journal of the Korean Chemical Society, Vol. 49, No. 6, 2005. https://doi.org/10.5012/jkcs.2005.49.6.567
  6. Nguyen, H.T., Tanemura S., Tanemura, M., Toh, S., Kaneko, K., Kawasaki, M.,2004.Structural and morphological characterization of anatase $TiO_2$ coating on x-Alumina scale fiber fabricated by sol-gel dip-coating method. Journal of CrystalGrowth, 271, 245-251. DOI: http://dx.doi.org/10.1016/j.jcrysgro.2004.07.038
  7. Segota, S., Curkovic, L.,Ljubas, D., Svetlicic, V., Houra, I.V.,Tomasic, N., 2010. Synthesis, characterization and photocataltic properties of sol-gel $TiO_2$ films. Ceramics International, Article in press.
  8. D. Tiwari, etal, "Synthesis of $TiO_2$ using Sol-Gel method and Comparison of photo catalytic Characteristics, Proc. of the 3rd Intl. CEMEPE & SECOTOX conf., Skiathos, June, 2011, ISBN 978-960-6865-43-5.
  9. Seung-Min Kim, etal, "Effect of Rutile Structure on $TiO_2$ Photocatalytic Activity,"Journal of the Korean Chemical Society, Vol. 49, No. 6, 2005. https://doi.org/10.5012/jkcs.2005.49.6.567