Abstract

The removal of diclofenac (DCF) from aqueous solutions was attempted using photocatalytic processes, involving a series of novel photocatalysts based on ZnMe (Me: Al; Co; Ga) layered double hydroxides (LDHs) and their derived mixed oxides. The catalysts were characterized using specific techniques. Under solar light, ZnCo and ZnGa catalysts degraded almost completely DCF from water, while the mineralization, expressed by total organic carbon removal, reached ∼85%. The degradation mechanisms of DCF photolysis and photocatalytic degradation under solar and UV irradiation were investigated. Supplementary Materials: Supplementary material for this article is supplied as a separate file: crchim-167-suppl.pdf L’élimination du diclofénac (DCF) de solutions aqueuses a été étudiée en utilisant des processus photocatalytiques, en utilisant une série de nouveaux photocatalyseurs basés sur d’hydroxydes doubles lamellaires ZnMe (Me : Al ; Co ; Ga) (LDH) et leurs oxydes mixtes dérivés. Les catalyseurs ont été caractérisés à l’aide de techniques spécifiques. Par irradiation en lumière solaire, les catalyseurs ZnCo et ZnGa ont dégradé presque complètement le DCF de l’eau, tandis que la minéralisation, exprimée par l’élimination totale du carbone organique, a atteint ∼85%. Les mécanismes de dégradation de la photolyse du DCF et de la dégradation photocatalytique sous irradiation solaire et UV ont été étudiés. Compléments : Des compléments sont fournis pour cet article dans le fichier séparé : crchim-167-suppl.pdf

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