Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
권호 표지
DOI QR코드

DOI QR Code

Properties of Low-Temperature Sol-Gel TiO2 Thin Films with Catalyst Content

졸-겔법으로 제작된 저온 TiO2 박막의 촉매농도에 따른 광분해 특성 분석

  • Published : 2006.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

ILow-temperature $TiO_2$ sol was synthesized with various catalyst contents by using a sol-gel method. $TiO_2$ thin films were produced by a dip-coating method and their optical, structural and photocatalytic properties were examined. Transmittance of $TiO_2$ thin films with 0.10 mol, 0.25 mol, 0.50 mol and 0.75 mol catalyst content showed high transmittance in the visible range. XRD results showed the anatase-to-rutile phase transition was accelerated with increasing catalyst content and the crystallinity size of the $TiO_2$ thin films increased with increasing catalyst content. SEM results indicated that the particle size of the $TiO_2$ thin films was the smallest with catalyst content of 0.25 mol. Photocatalytic results showed that methylene blue was completely decomposed in the presence of anatase film prepared with 0.10 mol, 0.25 mol and 0.50 mol catalyst content.

졸-겔법으로 촉매농도에 따라 저온 $TiO_2$ 졸을 제조한 후, 침지코팅법을 이용하여 $TiO_2$ 박막을 제작하였다. 제작된 저온 $TiO_2$ 박막의 광학적, 구조적, 광활성 특성을 조사하였다. 0.10 mol, 0.25 mol, 0.50 mol과 0.75 mol의 촉매농도로 제작된 저온 $TiO_2$ 박막은 가시광 영역에서 높은 투과율 특성을 나타내었다. XRD 스펙트럼 결과에 의하면 촉매농도가 증가함에 따라 아나타제 결정구조에서 루타일 결정구조로의 상전이가 촉진되고 결정크기는 촉매농도가 증가함에 따라 아나타제 결정크기가 감소하였다. SEM 결과로부터 $TiO_2$ 박막의 표면입자크기가 0.25 mol의 측매농도에서 가장 작았다. 아나타제 결정구조를 가지는 0.10 mol, 0.25 mol과 0.50 mol의 $TiO_2$ 박막 존재 하에서 메틸렌블루가 완전히 광분해 되는 것을 확인하였다.

Keywords

References

  1. A. Verma, D. P. Singh, A. K. Bakhshi, S. A. Agnihotry, 'Influence of aging and composition of the precursor sol on the properties of $CeO_2-TiO_2$ thin films for electrochromic applications,' J. Non-Cryst. Solids, vol. 351, pp. 2501-2512, 2005 https://doi.org/10.1016/j.jnoncrysol.2005.07.002
  2. S. W. Lee, D. H. Yang, T. Kunitake, 'Regioselective imprinting of anthracenecarboxylic acids onto $TiO_2$ gel ultra thin films: an approach to thin film sensor,' Sens. Actuators, vol. 104, pp. 35-42, 2005 https://doi.org/10.1016/j.snb.2004.04.096
  3. J. N. Harta, R. Cervinia, Y. B. Chenga, G. P. Simona, L. Spicciab, 'Formation of anatase $TiO_2$ by microwave processing,' Sol. Energy Mater. Sol. Cells, vol. 84, pp. 135-143, 2004 https://doi.org/10.1016/j.solmat.2004.02.041
  4. C. C. Trapalis, P. Keivanidis, G. Kordas, M. Zaharescu, M. Crisan, A. Szatvanyi, M. Gartner, '$TiO_2\;(Fe^{3+})$ nanostructured thin films with antibacterial properties,' Thin Solid Films, vol. 433, pp. 186-190, 2003 https://doi.org/10.1016/S0040-6090(03)00331-6
  5. S. Senthilkumaar, K. Porkodi, 'Heterogeneous photocatalytic decomposition of Crystal Violet in UV-illuminated sol-gel derived nanocrystalline $TiO_2$ suspensions,' J. Colloid Interface Sci, vol. 288, pp. 184-189, 2005 https://doi.org/10.1016/j.jcis.2005.02.066
  6. W. Wang, P. Serp, P. Kalck, J. L. Faria, 'Visible light photodegradation of phenol on $MWNT-TiO_2$ composite catalysts prepared by a modified sol-gel method,' J. Mol. Catal. A: Chem., vol. 235, pp. 194-199, 2005 https://doi.org/10.1016/j.molcata.2005.02.027
  7. L. Hu, T. Yoko, H. Kozuka, S. Sakka, 'Effects of solvent on properties of sol-gel-derived $TiO_2$ coating films,' Thin Solid Films, vol. 219, pp. 18-23, 1992 https://doi.org/10.1016/0040-6090(92)90718-Q
  8. Y. V. Kolen'ko, B. R. Churagulov, M. Kunst, L. Mazerolles, C. Colbeau-Justin, 'Photocatalytic properties of titania powders prepared by hydrothermal method,' Appl. Catal. B: Environ., vol. 54, pp. 51-58, 2004 https://doi.org/10.1016/j.apcatb.2004.06.006
  9. W. Choi, 'Studies on $TiO_2$ Photocatalystic Reactions,' J. Korean Ind. Eng. Chem., vol. 14, pp. 1011-1022, 2003
  10. S. K. Zheng, G. Xiang, T. M. Wang, F. Pan, C. Wang, W. C. Hao, 'Photocatalytic activity studies of $TiO_2$ thin films prepared by r.f. magnetron reactive sputtering,' Vacuum, vol. 72, pp. 79-84, 2004 https://doi.org/10.1016/S0042-207X(03)00104-0
  11. A. R. Bally, E. N. Korbeinikova, P. E. Schmid, F. Levy, F. Bussy, 'Structural and electrical properties of Fe-doped $TiO_2$ thin films,' J. Phys. D: Appl. Phys., vol. 31, pp. 1149-1154, 1998 https://doi.org/10.1088/0022-3727/31/10/004
  12. Z. Wang, U. Helmersson, P. O. Kall, 'Optical properties of anatase $TiO_2$ thin films prepared by aqueous sol–gel process at low temperature,' Thin Solid Films, vol. 405, pp. 50–54, 2002
  13. A. Aidla, T. Uustare, A. A. Kiisler, J. Aarik, V. Sammelselg, 'Effect of crystal structure on optical properties of $TiO_2$ films grown by atomic layer deposition,' Thin Solid Films, vol. 305, pp. 270-273, 1997 https://doi.org/10.1016/S0040-6090(97)00135-1
  14. Y. Bessekhouad, D. Robert, J-V Weber, N. Chaoui, 'Effect of alkaline-doped $TiO_2$ on photocatalytic efficiency,' J. Photochem. Photobiol. A: Chem., vol. 167, pp. 49-57, 2004 https://doi.org/10.1016/j.jphotochem.2003.12.001
  15. M. Langlet, A. Kim, M. Audier, C. Guillard, J. M. Herrmann, 'Transparent photocatalytic films deposited on polymer substrates from sol-gel processed titania sols,' Thin Solid Films, vol. 429, pp. 13-21, 2003 https://doi.org/10.1016/S0040-6090(02)01290-7
  16. M. E. Manrıquez, T. Lopez, R. Gomeza, J. Navarrete, 'Preparation of $TiO_2-ZrO_2$ mixed oxides with controlled acid-basic properties,' J. Mol. Catal. A: Chem., vol. 220, pp. 229-237, 2004 https://doi.org/10.1016/j.molcata.2004.06.003
  17. M. Keshmiri, M. Mohseni, T. Troczynski, 'Development of novel $TiO_2$ sol-gel-derived composite and its photocatalytic activities for trichloroethylene oxidation,' Appl. Catal. B: Environ., vol. 53, pp. 209-219, 2004 https://doi.org/10.1016/j.apcatb.2004.05.016
  18. J. W. Yoon, T. Sasaki, N. Koshizaki, E. Traversa, 'Preparation and characterization of $M/TiO_2$ (M=Ag, Au, Pt) nanocomposite thin films,' Scripta Mater., vol. 44, pp. 1865-1868, 2001 https://doi.org/10.1016/S1359-6462(01)00732-1
  19. Y. U. Ahn, E. J. Kim, S. H. Hahn, 'Variation of structural and optical properties of sol-gel $TiO_2$ thin films with catalyst concentration and calcination temperature,' Mater. Lett., vol. 57, pp. 4660-4666, 2003 https://doi.org/10.1016/S0167-577X(03)00380-X
  20. M. Anpo, T. Shima, S. Kodama, Y. Kubokawa, 'Photocatalytic hydrogenation of $CH_3CCH$ with $H_2O$ on small-particle $TiO_2$: size quantization effects and reaction intermediates,' J. Phys. Chem., vol. 91, pp. 4305-4310, 1987 https://doi.org/10.1021/j100300a021
  21. D. Mardare, M. Tasca, M. Delibas, G. I. Rusu, 'On the structural properties and optical transmittance of $TiO_2$ r.f. sputtered thin films,' Appl. Surf. Sci., vol. 156, pp. 200-206, 2000 https://doi.org/10.1016/S0169-4332(99)00508-5
  22. T. M. Wang, S. K. Zheng, W. C. Hao, C. Wang, 'Studies on photocatalytic activity and transmittance spectra of $TiO_2$ thin films prepared by r.f. magnetron sputtering method,' Surf. Coat. Tech., vol. 155, pp. 141-145, 2002 https://doi.org/10.1016/S0257-8972(02)00004-X
  23. W. Zhang, Y. Li, S. Zhu, F. Wang, 'Influence of argon flow rate on $TiO_2$ photocatalyst film deposited by dc reactive magnetron sputtering,' Surf. Coat. Tech., vol. 182, pp. 192-198, 2004 https://doi.org/10.1016/j.surfcoat.2003.08.050