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

Matos, Juan; Garcia, Andreina; Cordero, Tulynan; Chovelon, Jean-Marc; Ferronato, Corinne


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.

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Título según WOS: ID WOS:000267330300044 Not found in local WOS DB
Título de la Revista: CATALYSIS LETTERS
Volumen: 130
Número: 3-4
Editorial: Springer
Fecha de publicación: 2009
Página de inicio: 568
Página final: 574


Notas: ISI