Catalysis Letters

, Volume 130, Issue 3–4, pp 568–574

Eco-friendly TiO2–AC Photocatalyst for the Selective Photooxidation of 4-Chlorophenol

  • Juan Matos
  • Andreina Garcia
  • Tulynan Cordero
  • Jean-Marc Chovelon
  • Corinne Ferronato
Article

Abstract

The influence of surface pH of activated carbon on selectivity of TiO2 during the photooxidation of 4-chlorophenol on UV-irradiation was studied. Chlorine substitution by p-hydroxylation yielding hydroquinone in equilibrium with benzoquinone and o-hydroxylation to 4-chlorocathecol were detected as the main intermediates in the photooxidation of 4CP. Changes in surface pH of carbons from basic to closely neutral induce a remarkably increase in the production of 4-chlorocatechol by a factor of 22 on TiO2–AC in comparison of TiO2 alone. A mechanism of interaction between both solids is proposed to explain changes both in photoactivity and photoselectivity of TiO2. In conclusion, results showed that TiO2–AC can be used as an alternative green photocatalyst in organic synthesis.

Keywords

Selectivity Photocatalysis TiO2 Activated carbon 4-Chlorophenol 

References

  1. 1.
    Anpo M (2000) Pure Appl Chem 72:1265CrossRefGoogle Scholar
  2. 2.
    Herrmann J-M, Duchamp C, Karkmaz M, Hoai BT, Lachheb H, Puzenat E, Guillar C (2007) J Haz Mat 146:624CrossRefGoogle Scholar
  3. 3.
    Anastas PT, Warner JC (1998) Green chemistry: theory and practice. Oxford University Press, New York, p 30Google Scholar
  4. 4.
    Palmisano G, Augugliaro V, Pagliaro M, Palmisano L (2007) Chem Comm 3425Google Scholar
  5. 5.
    Cordero T, Duchamp C, Chovelon J-M, Ferronato C, Matos J (2007) Appl Catal B Environ 73:22CrossRefGoogle Scholar
  6. 6.
    Cordero T, Duchamp C, Chovelon J-M, Ferronato C, Matos J (2007) J Photochem Photobiol A Chem 191:122CrossRefGoogle Scholar
  7. 7.
    Lopez MV, Stoeckli F, Moreno C, Carrasco F (1999) Carbon 27:1215CrossRefGoogle Scholar
  8. 8.
    Matos J, Laine J, Herrmann J-M (1998) Appl Catal B Environ 18:281CrossRefGoogle Scholar
  9. 9.
    Matos J, Laine J, Herrmann J-M (2001) J Catal 200:10CrossRefGoogle Scholar
  10. 10.
    Matos J, Laine J, Herrmann J-M, Uzcategui D, Brito JL (2007) Appl Catal B Environ 70:461CrossRefGoogle Scholar
  11. 11.
    Maldotti A, Molinari A, Amadelli R (2002) Chem Rev 102:3811CrossRefGoogle Scholar
  12. 12.
    Peralta-Hernández JM, Manríquez J, Meas-Vong Y, Rodríguez FJ, Chapman TW, Maldonado MI, Godínez LA (2007) J Hazard Mater 147:588CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Juan Matos
    • 1
  • Andreina Garcia
    • 1
  • Tulynan Cordero
    • 2
  • Jean-Marc Chovelon
    • 3
  • Corinne Ferronato
    • 3
  1. 1.Photocatalysis Laboratory, Chemistry CentreVenezuelan Institute for Scientific Research, I.V.I.C.Caracas 1020-AVenezuela
  2. 2.Venezuelan Institute for Scientific ResearchCaracas 1020-AVenezuela
  3. 3.IRCELYON, UMR-CNRS 5256Université de LyonVilleurbanneFrance

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