Published June 26, 2017 | Version v1
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Study of the visible light activity of Pt and Au-TiO2 photocatalysts in organic pollutants degradation

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  • 1. Universidad Pedagógica y Tecnológica de Colombia
  • 2. Universidad de Sevilla

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Description

Pt-TiO2 and Au-TiO2 photocatalysts were prepared by noble metal photodeposition on sulfated TiO2. It was observed that optical absorption, oxidation state and particle size of the metallic species (Pt or Au) play an important role in the TiO2 photocatalytic activity under visible-light irradiation. Photocatalytic activity of the bare TiO2 powder in the phenol and methyl orange degradation increased with the sulfation and metal addition. The highest degradation rate under UV-Visible and visible light irradiation was obtained on Pt-S-TiO2 photocatalyst; this is mainly due to the optical properties of TiO2 induced by platinization and also to the good distribution and low Pt particles size. It was also found that this catalyst has a good stability after two cycles of reaction in the phenol photodegradation under UV-Visible light irradiation. The Pt-S-TiO2 photocatalyst was also active under solar light and under the environmental conditions of the city of Tunja (Boyacá), Colombia.

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References

  • 1. M. Pelaez et al., "A review on the visible light active titanium dioxide photocatalysts for environmental applications," Appl. Catal. B., vol. 125, pp. 331– 349, 2012.
  • 2. S. Malato, P. Fernández, M. I. Maldonado, J. Blanco, and W. Gernjak., "Decontamination and disinfection of water by solar photocatalysis: Recent overview and trends," Catal. Today., vol. 147, no. 1, pp. 1–59, 2009.
  • 3. S. G. Kumar and L. G. Devi, "Review on Modified TiO2 Photocatalysis under UV/Visible Light: Selected Results and Related Mechanisms on Interfacial Charge Carrier Transfer Dynamics," J. Phys. Chem. A., vol. 115, no. 46, pp. 13211–13241, 2011.
  • 4. T. Fotiou, T. M. Triantis, T. Kaloudis, and A. Hiskia, "Evaluation of the photocatalytic activity of TiO2 based catalysts for the degradation and mineralization of cyanobacterial toxins and water off-odor compounds under UV-A, solar and visible light," Chem. Eng. J., vol. 261, pp. 17–26, 2015.
  • 5. S. Rehman, R. Ullah, A. M. Butt, and N. D. Gohar, "Strategies of making TiO2 and ZnO visible light active," J. Hazard. Mater., vol. 170, no. 2-3, pp. 560–569, 2009
  • 6. A. A. Ashkarran, H. Hamidinezhad, H. Haddadi, and M. Mahmoudid, "Double-doped TiO2 nanoparticles as an efficient visible-light-activephotocatalyst and antibacterial agent under solar simulated light," Appl. Surf. Sci., vol. 301, pp. 338–345, 2014
  • 7. S. H. Hsieh, W. J. Chen, and C. T. Wu, "Pt-TiO2/graphene photocatalysts for degradation of AO7 dye under visible light," Appl. Surf. Sci., vol. 340, pp. 9–17, 2015
  • 8. S. Neubert et al., "Surface-Modified TiO2 Photocatalysts Prepared by a Photosynthetic Route: Mechanism, Enhancement, and Limits," ChemPlusChem., vol. 79, no. 1, pp. 163–170, 2014.
  • 9. J. J. Murcia, M. C. Hidalgo, J. A. Navío, J. Araña, and J. M. Doña, "Correlation study between photo-degradation and surface adsorption properties of phenol and methyl orange on TiO2 Vs platinum-supported TiO2," Appl. Catal. B., vol. 150–151, pp. 107–115, 2014.
  • 10. M. Maicu, M.C. Hidalgo, G. Colón and J.A. Navío, "Comparative study of the photodeposition of Pt, Au and Pd on pre-sulphated TiO2 for the photocatalytic decomposition of phenol," J. Photochem. Photobiol. A., vol. 217, pp. 275-283, 2011
  • 11. N. M. Thuy, D. Q. Van, and L. T. Hong, "The Visible Light Activity of the TiO2 and TiO2:V4+ Photocatalyst," Nanomater. Nanotechnol., vol. 2, pp. 1–8, 2012
  • 12. S. W. Verbruggen et al., "Plasmonic gold–silver alloy on TiO2 photocatalysts with tunable visible light activity," Appl. Catal. B., vol. 156–157, pp. 116–121, 2014
  • 13. A. Golabiewska et al., "Visible light photoactivity of TiO2 loaded with monometallic (Au or Pt) and bimetallic (Au/Pt) nanoparticles," Appl. Surf. Sci., vol. 317, pp. 1131–1142, 2014
  • 14. N. Lakshminarasimhan, A. D. Bokare, and W. Choi, "Effect of Agglomerated State in Mesoporous TiO2 on the Morphology of Photodeposited Pt and Photocatalytic Activity," J. Phys. Chem. C., vol. 116, no. 33, pp. 17531–17539, 2012
  • 15. S. Semlali et al., "Mesoporous Pt-TiO2 thin films: Photocatalytic efficiency under UV and visible light," Appl. Catal. B., vol. 150–151, pp. 656– 662, 2014.
  • 16. K. Okazaki, Y. Morikawa, S. Tanaka, K. Tanaka, and M. Kohyama, "Effects of stoichiometry on electronic states of Au and Pt supported on TiO2 (110)," J. Mater. Sci., vol. 40, no. 12, pp. 3075–3080, 2005.
  • 17. L. C. Chen, F. R. Tsai, and C. M. Huang, "Photocatalytic decolorization of methyl orange in aqueous medium of TiO2 and Ag–TiO2 immobilized on γ-Al2O3," J. Photochem. Photobiol. A., vol. 170, no. 1, pp. 7–14, 2005.
  • 18. Z. Zheng et al., "Facile in situ synthesis of visible-light plasmonic photocatalysts M@TiO2 (M = Au, Pt, Ag) and evaluation of their photocatalytic oxidation of benzene to phenol," J. Mater. Chem., vol. 21, no. 25, pp. 9079– 9087, 2011
  • 19. B. Wang et al., "Fabrication and enhanced visible-light photocatalytic activity of Pt-deposited TiO2 hollow nanospheres," Chem. Eng. J. vol. 223, pp. 592–603, 2013.
  • 20. Y. Ishibai, J. Sato, T. Nishikawa, and S. Miyagishi, "Synthesis of visible-light active TiO2 photocatalyst with Pt-modification: Role of TiO2 substrate for high photocatalytic activity," Appl. Catal. B., vol. 79, no. 2, pp. 117–121, 2008.
  • 21. W. Macyk and H. Kisch, "Photosensitization of Crystalline and Amorphous Titanium Dioxide by Platinum(IV) Chloride Surface Complexes," Chem. Eur. J., vol. 7, no. 9, pp. 1862–1867, 2001
  • 22. R. Palmans and A. J. Frank, "A molecular waterreduction catalyst: surface derivatization of titania colloids and suspensions with a platinum complex," J. Phys. Chem., vol. 95, no. 23, pp. 9438–9443, 1991.
  • 23. J. Ma, H. Wu, Y. Liu, and H. He, "Photocatalytic Removal of NOx over Visible Light Responsive Oxygen-Deficient TiO2," J. Phys. Chem. C., vol. 118, no. 14, pp. 7434-7441, 2014
  • 24. I. Nakamura et al., "Role of oxygen vacancy in the plasma-treated TiO2 photocatalyst with visible light activity for NO removal," J. Mol. Catal. A: Chem., vol. 161, no. 1-2, pp. 205–212, 2000
  • 25. T. Ihara, M. Miyoshi, Y. Iriyama, O. Matsumoto, and S. Sugihara, "Visible-light-active titanium oxide photocatalyst realized by an oxygen-deficient structure and by nitrogen doping," Appl. Catal. B. vol. 42, no. 4, pp. 403–409, 2003.
  • 26. A. A. Ismail and D. W. Bahnemann, "Mesostructured Pt/ TiO2 Nanocomposites as Highly Active Photocatalysts for the Photooxidation of Dichloroacetic Acid," J. Phys. Chem. C., vol. 115, no. 13, pp. 5784–5791, 2011.
  • 27. S. Linic, P. Christopher, and D. B. Ingram, "Plasmonicmetal nanostructures for efficient conversion of solar to chemical energy," Nat. Mater., vol. 10, no. 12, pp. 911–921, 2011.
  • 28. N. Pugazhenthiran, S. Murugesan, P. Sathishkumar, and S. Anandan, "Photocatalytic degradation of ceftiofur sodium in the presence of gold nanoparticles loaded TiO2 under UV–visible light," Chem. Eng. J., vol. 241, pp. 401–409, 2014.
  • 29. E. Grabowska, J. Reszczynska, and A. Zaleska, "Mechanism of phenol photodegradation in the presence of pure and modified-TiO2: A review," Water Res., vol. 46, no. 17, pp. 5453 – 5471, 2012