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


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.


Selectivity Photocatalysis TiO2 Activated carbon 4-Chlorophenol 


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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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