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Degradation of p-nitrophenol and bacteria with TiO2 xerogels sensitized in situ with tetra(4-carboxyphenyl)porphyrins

par Tasseroul, L.;Lambert, S.;Eskenazi, D.;Amoura, M.;Páez, C.;Hiligsmann, Serge ;Thonart, P.;Heinrichs, B.
Référence Journal of photochemistry and photobiology. A, Chemistry, 272, page (90-99)
Publication Publié, 2013

Article révisé par les pairs

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Résumé :

[en] TiO2-based materials doped with porphyrins have been prepared using a sol-gel process. To stabilize the TiO2-dye interactions, free metal tetra(4-carboxyphenyl)porphyrin and nickel tetra(4-carboxyphenyl) porphyrin were introduced in situ into the TiO2 matrix during the sol-gel process rather than by grafting. Samples were thoroughly characterized by TEM, X-ray diffraction, FT-IR, DR-UV/vis and their texture has been examined by nitrogen adsorption-desorption at 77 K. The low thermal treatment allows obtaining anatase-TiO2 particles with high specific surface area without porphyrin degradation. A significant improvement of the photoactivity under visible light of porphyrin doped-TiO2 xerogels was observed for p-nitrophenol and for bacterial degradation. textcopyright 2013 Elsevier B.V. All rights reserved.