Synthesis and characterization of Tio2 thin films doped with copper to be used in photocatalysis
Abstract
In this work we studied the influence of incorporation of copper into TiO2 thin films on structural, optical and surface properties of TiO2 thin films. The as-grown TiO2 was synthesized by sol gel method using titanium isopropoxide, and the TiO2 thin films were deposited by spin coating method. TiO2 copper-doped (Cu:TiO2) was synthesized by impregnation method using Cu(NO3).H2O as source of Cu(II), the Cu:TiO2 thin films were deposited by spin coating method. The properties of the compounds obtained were evaluated by measurements of X-ray diffraction (XRD) and diffuse reflectance. The XRD results showed that Cu doping change the crystalline phase radio of the films, XRD pattern of TiO2 indicated that films grow with anatase structute, while Cu:TiO2 thin films presented a polycrystalline mixture of anatase/rutile. Reflectance analysis indicated that TiO2 presents an energy band gap of 3.25 eV and the Cu:TiO2 presents a shift-red of the band gap to 2,9 eV. The results suggest that doping with copper improved the harvesting of the TiO2 to visible radiation.
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References
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[4] H. Yamashita, M. Harada, J. Misaka, H. Nakao, M. Takeuchi, M. Anpo. Application of ion beams for preparation of TiO2 thin film photocatalysts operatable under visible light irradiation: Ionassisted deposition and metal ion-implantation. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 206 (2003) 889-892.
[5] X. Li, Z. Zhuang, W. Li, H. Pan. Photocatalytic reduction of CO2 over noble metal-loaded and nitrogen-doped mesoporous TiO2. Applied Catalysis A: General 429–430 (2012) 31-38.
[6] Y. Gurkan, E. Kasapbasi, Ze.Cinar. Enhanced solar photocatalytic activity of TiO2 by selenium(IV) ion-doping: Characterization and DFT modeling of the surface. Chemical Engineering Journal, 214 (2013) 34-44.
[7] Y. Chen, X. Cao, B. Lin, B. Gao. Origin of the visible-light photoactivity of NH3-treated TiO2: Effect of nitrogen doping and oxygen vacancies. Applied Surface Science, 264 (2013) 845-852.
[8] S. Chin, E. Park, M. Kim, G. Bae, J. Jurng. Synthesis and visible light photocatalytic activity of transition metal oxide (V2O5) loading on TiO2 via a chemical vapor condensation method. Materials Letters 75 (2012) 57-60.
[9] A. Zajac, M. Radecka, M. Jasinski, K.A. Michalow, M. Rekas, E. Kusior, K. Zakrzewsk, A. Heel, T. Graule, K. Kowalski. Influence of Cr on structural and optical properties of TiO2:Cr nanopowders prepared by flame spray synthesis. Journal of Power Sources 194 (2009) 104–111.
[10] S. Ghasemi, S. Rahimnejad, S. R. Setayesh, S. Rohani, M.R. Gholami. Transition metal ions effect on the properties and photocatalytic activity of nanocrystalline TiO2 prepared in an ionic liquid. Journal of Hazardous Materials 172 (2009) 1573–1578.
[11] H. Dang, X. Dong, Y. Dong, Y. Zhang, S. Hampshire. TiO2 nanotubes coupled with nano-Cu(OH)2 for highly efficient photocatalytic hydrogen production. International Journal of Hydrogen Energy 38 (2013) 2126-2135.
[12] K. Wilke, H.D. Breuer. The influence of transition metal doping on the physical and photocatalytic properties of titania. J. Photochem. Photobiol. A: Chem. 121 (1999) 49–53.
[13] H.A. Foster, D.W. Sheel, P. Sheel, P. Evans, S. Varghese, N. Rutschke, H.M. Yates. Antimicrobial activity of titania/silver and titania/copper films prepared by CVD. Journal of Photochemistry and Photobiology A: Chemistry 216 (2010) 283-289
[14] U.G. Akpan, B.H. Hameed. The advancements in sol–gel method of doped-TiO2 photocatalysts. Applied Catalysis A: General 375 (2010) 1–11.
[15] W. Zhang, Y. Li, S. Zhu, F. Wang. Copper doping in titanium oxide catalyst film prepared by dc reactive magnetron sputtering. Catalysis Today, 93– 95 (2004) 589-594.
[16] C. Tsai, H. Hsi, T. Kuo, Y. Chang, J. Liou. Preparation of Cu-Doped TiO2 Photocatalyst with Thermal Plasma Torch for Low-Concentration Mercury Removal. Aerosol and Air Quality Research doi: 10.4209/aaqr.2012.07.0196. In press.
[17] P. Pongwan, B. Inceesungvorn, K. Wetchakun, S. Phanichphant, N. Wetchakun. Highly Efficient Visible-Light-Induced Photocatalytic Activity of Fe-doped TiO2 Nanoparticles. Engineering Journal. DOI:10.4186/ej.2012.16.3.143. in press.
[18] J. Tauc (F. Abeles ed.), Optical Properties of Solids, North-Holland (1972). 19-92.
[19] A. Cesnovar, P. Paunovic, A. Grozdanov, P. Makreski, E. Fidancevska. Preparation of nanocrystalline TiO2 by sol-gel method using titanium tetraisopropoxide (TTIP). Advanced Natural Science: Theory & Applications 01/2012; 1(2):133- 142.
[20] A. K. Ray, S. M. Tracey, B. McQuillin, S. N. B. Hodgson, IEEE Proc. Sc., Meas. Technol. 147(6), 301 (2000).
[21] B. Xu, L. Dong, Y. Chen, J. Chem. Soc., Faraday Trans. 94 (13) (1998) 1905.
[22] M. Burgos, M. Langlet. The sol-gel transformation of TIPT coatings: a FTIR study. Thin Solid Films Vol. 349 (1999) 19.
[23] P. M. Kumar, S. Badrinarayanan, M. Sastry. Nanocrystalline TiO2 studied by optical, FTIR and X-ray photoelectron spectroscopy: correlation to presence of surface states. Thin Solid Films 358 (2000) 122-130.
Published
2013-06-30
How to Cite
Díaz Uribe, C., Vallejo Lozada, W., & Martínez Ortega, F. (2013). Synthesis and characterization of Tio2 thin films doped with copper to be used in photocatalysis. ITECKNE, 10(1), 16-20. https://doi.org/https://doi.org/10.15332/iteckne.v10i1.188
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Section
Research and Innovation Articles
