Hybrid photocatalytic membranes embedding decatungstate for heterogeneous photooxygenation |
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Authors: | Marcella Bonchio Mauro Carraro Martino Gardan Gianfranco Scorrano Enrico Drioli Enrica Fontananova |
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Affiliation: | (1) ITM-CNR and Department of Chemical Sciences, University of Padova, Via Marzolo, 1, 35131 Padova, Italy;(2) ITM-CNR, University of Calabria, Via P. Bucci, Cubo 17C, 87030 Rende (CS), Italy |
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Abstract: | The incorporation of decatungstate in polymeric membranes provides new heterogeneous photocatalysts for the oxidation of organic
substrates under oxygen atmosphere at 25 °C. Photocatalytic membranes have been prepared yielding polymeric films with a high
thermal, chemical and mechanical stability (PVDF, PDMS, Hyflon). Surface spectroscopy techniques including transmittance and
reflectance UV-Vis and FT-IR have been used to assess the photocatalyst integrity within the polymeric support. Catalyst screening
has been performed under both homogeneous and heterogeneous photooxygenation conditions. The photocatalyst activity has been
evaluated in terms of the substrate conversion, turnover numbers, and recycling experiments. A membrane induced selectivity
behavior has been evidenced by comparison with homogeneous oxidations. |
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Keywords: | polyoxometalates photocatalysis decatungstate oxygen heterogeneous photooxidation catalytic membranes alcohols |
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