Photocatalytic degradation of sulphur-containing aromatic compounds in the presence of zeolite-bound 2,4,6-triphenylpyrylium and 2,4,6- triphenylthiapyrylium

Mercedes Alvaro, Esther Carbonell Llopis, Hermenegildo García

Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs

Résumé

A series of solid photocatalysts in which 2,4,6-triphenylpyrylium (TP +) or 2,4,6-triphenylthiapyrylium (TPTP+) are encapsulated within zeolites Y and Beta has been prepared and used for the photocatalytic degradation of thianthrene, diphenyl sulphide, diphenyl disulphide, benzothiophene and the cyclic propylene dithioacetal of acetophenone. TPTP + was found more active than TP+ and the initial reaction rate is about one order of magnitude higher than that of P-25 TiO2 standard. The TPTP+ photocatalysts can be reused with moderate decay in their activity, but without noticeable self-degradation of the dye. The efficiency of the photocatalytic degradation depends considerably on the nature of the organosulphur compound, diphenyl disulphide and the cyclic dithioacetal being considerably easier degraded that dibenzothiophene that was the most difficult compound to decompose of the series.

langue originaleAnglais
Pages (de - à)195-202
Nombre de pages8
journalApplied Catalysis B: Environmental
Volume51
Numéro de publication3
Les DOIs
Etat de la publicationPublié - 10 août 2004
Modification externeOui

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