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P-Doped Titania Xerogels as Efficient UV-Visible Photocatalysts
Laboratory of Chemical Engineering—Nanomaterials, Catalysis, Electrochemistry, University of Liege, Liege, Belgium
Laboratory of Chemical Engineering—Nanomaterials, Catalysis, Electrochemistry, University of Liege, Liege, Belgium
Laboratory of Chemical Engineering—Nanomaterials, Catalysis, Electrochemistry, University of Liege, Liege, Belgium
Laboratory of Chemical Engineering—Nanomaterials, Catalysis, Electrochemistry, University of Liege, Liege, Belgium
Charles Gerhardt Montpellier Institute (UMR5253 CNRS-UM2-ENSCM-UM1), Montpellier, Franc
Charles Gerhardt Montpellier Institute (UMR5253 CNRS-UM2-ENSCM-UM1), Montpellier, France
Laboratory of Chemical Engineering—Nanomaterials, Catalysis, Electrochemistry, University of Liege, Liege, Belgium
Laboratory of Chemical Engineering—Nanomaterials, Catalysis, Electrochemistry, University of Liege, Liege, Belgium
- 1 Laboratory of Chemical Engineering—Nanomaterials, Catalysis, Electrochemistry, University of Liege, Liege, Belgium
- 2 Laboratory of Chemical Engineering—Nanomaterials, Catalysis, Electrochemistry, University of Liege, Liege, Belgium
- 3 Laboratory of Chemical Engineering—Nanomaterials, Catalysis, Electrochemistry, University of Liege, Liege, Belgium
- 4 Laboratory of Chemical Engineering—Nanomaterials, Catalysis, Electrochemistry, University of Liege, Liege, Belgium
- 5 Charles Gerhardt Montpellier Institute (UMR5253 CNRS-UM2-ENSCM-UM1), Montpellier, Franc
- 6 Charles Gerhardt Montpellier Institute (UMR5253 CNRS-UM2-ENSCM-UM1), Montpellier, France
- 7 Laboratory of Chemical Engineering—Nanomaterials, Catalysis, Electrochemistry, University of Liege, Liege, Belgium
- 8 Laboratory of Chemical Engineering—Nanomaterials, Catalysis, Electrochemistry, University of Liege, Liege, Belgium
Journal of Materials Science and Chemical Engineering·Volume 02 (2014)·Pages 17–32·Published 11 August 2014·DOI10.4236/msce.2014.28004
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Abstract
In the present study, sol-gel process is used to synthesize P-doped TiO 2 xerogels by the cogelation method of a functionalized P alkoxide, (NH 2 -(CH 2 ) 2 -NH-(CH 2 ) 2 -P(O)-(OC 2 H 5 ) 2 ) with Ti(OC 3 H 7 ) 4 in either 2-methoxyethanol or isopropanol. The phosphorus-doping improved the thermal stability of titania and decreased the phase transformation of anatase into rutile. This modification by phosphorus shifted the absorption edge of titania to the visible region as proved by Diffuse reflectance measurements, and thus offers the possibility to produce visible light effective TiO 2 photocatalyst. The excellent photocatalytic activity of P-doped TiO 2 xerogels compared to pure TiO 2 could be explained by its high surface area and small TiO 2 -anatase crystallite size. From these results, it was proved by using three different models that phosphorus intrinsically influences the photocatalytic activity.
KeywordsTiO<sub>2</sub>xerogelPhosphorus-DopingSol-Gelp-Nitrophenol DegradationPhotocatalysis
- Fujishima, A., Rao, T.N. and Tryk, D.A. (2000) Titanium Dioxide Photocatalysis. Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 1, 1-21.
- Gaya, U.I. and Abdullah, A.H. (2008) Heterogeneous Photocatalytic Degradation of Organic Contaminants over Titanium Dioxide: A Review of Fundamentals, Progress and Problems. Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 9, 1-12. http://dx.doi.org/10.1016/j.jphotochemrev.2007.12.003
- Mills, A. and Le Hunte, S. (1997) An Overview of Semiconductor Photocatalysis. Journal of Photochemistry and Photobiology A: Chemistry, 108, 1-35. http://dx.doi.org/10.1016/S1010-6030(97)00118-4
- Lv, Y., Yu, L., Huang, H., Liu, H. and Feng, Y. (2009) Preparation, Characterization of P-Doped TiO 2 Nanoparticles and Their Excellent Photocatalystic Properties under the Solar Light Irradiation. Journal of Alloys and Compounds, 488, 314-319. http://dx.doi.org/10.1016/j.jallcom.2009.08.116
- Lin, L., Zheng, R.Y., Xie, J.L., Zhu, Y.X. and Xie, Y.C. (2007) Synthesis and Characterization of Phosphor and Nitrogen Co-Doped Titania. Applied Catalysis B: Environmental, 76, 196-202. http://dx.doi.org/10.1016/j.apcatb.2007.05.023
- Xu, L., Tang, C.Q., Qian, J., Huang, Z. B. (2010) Theoretical and Experimental Study on the Electronic Structure and Optical Absorption Properties of P-Doped TiO 2 . Applied Surface Science, 256, 2668-2671. http://dx.doi.org/10.1016/j.apsusc.2009.11.046
- Yu, J., Yu, J.C., Ho, W., Leung, M.P.K., Cheng, B., Zhang, G. and Zhao, X. (2003) Effects of Alcohol Content and Calcination Temperature on the Textural Properties of Bimodally Mesoporous Titania. Applied Catalysis A: General, 255, 309-320. http://dx.doi.org/10.1016/S0926-860X(03)00570-2
- Stafford, U., Gray, K.A., Kamat, P.V. and Varma, A. (1993) An in Situ Diffuse Reflectance FTIR Investigation of Photocatalytic Degradation of 4-Chlorophenol on a TiO 2 Powder Surface. Chemical Physics Letters, 205, 55-61. http://dx.doi.org/10.1016/0009-2614(93)85166-L
- Yoo, K.S., Lee, T.G. and Kim, J. (2005) Preparation and Characterization of Mesoporous TiO 2 Particles by Modified Sol-Gel Method Using Ionic Liquids. Microporous and Mesoporous Materials, 84, 211-217. http://dx.doi.org/10.1016/j.micromeso.2005.05.029
- Simonsen, M. and Søgaard, E. (2010) Sol-Gel Reactions of Titanium Alkoxides and Water: Influence of pH and Alkoxy Group on Cluster Formation and Properties of the Resulting Products. Journal of Sol-Gel Science and Technology, 53, 485-497. http://dx.doi.org/10.1007/s10971-009-2121-0