Comparative study on the photocatalytic mineralization of homologous aliphatic acids and alcohols |
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| Authors: | J. Arañ a,J.M. Doñ a Rodrí guez,O. Gonzá lez Dí az,J.A. Herrera Meliá n,J. Pé rez Peñ a |
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| Affiliation: | a Grupo de Fotocatálisis y Electroquímica Aplicada al Medio-Ambiente (FEAM), Unidad Asociada al Instituto de Ciencia de Materiales de Sevilla, C.S.I.C, Spain
b CIDIA (Depto. de Química), Universidad de las palmas de gran canaria, Edificio del Parque Científico Tecnológico, Campus Universitario de Tafira, 35017 Las Palmas, Spain |
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| Abstract: | The photocatalytic mineralization of methanol, ethanol and 1-propanol is compared with those of their homologous carboxylic acids (formic, acetic and propanoic). The presence of S2O82− ions almost does not affect the alcohols mineralization. But, those of the acids are slowed down. In addition to this, adding H2O2 inhibits the alcohols mineralization and those of the acids, but to a lesser extent.FT-IR studies have shown that carboxylates generated from the oxidation of the corresponding alcohols adsorb at different centres from those where carboxylates directly generated from formic, acetic and propanoic acids do.From the obtained results, mineralizations of these compounds have been correlated with their proximity and accessibility to photoactive centres. |
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| Keywords: | Photocatalysis Alcohols Carboxylic acids Photoactive centres FT-IR |
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