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Photocatalysis with Na4W10O32 in water system: Formation and reactivity of OH center dot radicals (Articolo in rivista)
- Type
- Label
- Photocatalysis with Na4W10O32 in water system: Formation and reactivity of OH center dot radicals (Articolo in rivista) (literal)
- Anno
- 2013-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.molcata.2013.01.037 (literal)
- Alternative label
Molinari, Alessandra and Argazzi, Roberto and Maldotti, Andrea (2013)
Photocatalysis with Na4W10O32 in water system: Formation and reactivity of OH center dot radicals
in Journal of molecular catalysis. A, Chemical (Print); ELSEVIER SCIENCE B.V., AMSTERDAM (Paesi Bassi)
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- Molinari, Alessandra and Argazzi, Roberto and Maldotti, Andrea (literal)
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- Molinari, A (Reprint Author), Univ Ferrara, Dipartimento Chim, Via Luigi Borsari 46, I-44123 Ferrara, Italy. Molinari, Alessandra; Maldotti, Andrea, Univ Ferrara, Dipartimento Chim, I-44123 Ferrara, Italy. Argazzi, Roberto, Ctr ISOF CNR, I-44123 Ferrara, Italy. (literal)
- Titolo
- Photocatalysis with Na4W10O32 in water system: Formation and reactivity of OH center dot radicals (literal)
- Abstract
- Photoexcitation of Na4W10O32 dissolved in water leads to the formation of hydroxyl radicals. These species originate both from H2O oxidation and H2O2 reduction. EPR-spin trapping investigation and laser flash photolysis experiments contribute to clarify their formation mechanism and their involvement in the oxidation of propan-2-ol. Continuous irradiation of water solutions of Na4W10O32 leads to the overoxidation of propan-2-ol to CO2 with high yield. This result may be of interest for the development of photocatalytic systems aimed to pollutants degradation. Entrapment of Na4W10O32 into a microporous silica matrix gives a rather robust photocatalyst where the decatungstate structure is preserved. This material is able to catalyze the photooxidation of propan-2-ol to acetone with appreciable chemoselectivity. In particular, it is seen that the solid photocatalyst yields acetone as main product inhibiting its over-oxidation to carbon dioxide. (C) 2013 Elsevier B.V. All rights reserved. (literal)
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