http://www.cnr.it/ontology/cnr/individuo/prodotto/ID297751
Surface fluorination on TiO2 catalyst induced by photodegradation of perfluorooctanoic acid (Articolo in rivista)
- Type
- Label
- Surface fluorination on TiO2 catalyst induced by photodegradation of perfluorooctanoic acid (Articolo in rivista) (literal)
- Anno
- 2015-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.cattod.2014.04.031 (literal)
- Alternative label
Gatto, Sara; Sansotera, Maurizio; Persico, Federico; Gola, Massimo; Pirola, Carlo; Panzeri, Walter; Navarrini, Walter; Bianchi, Claudia L. (2015)
Surface fluorination on TiO2 catalyst induced by photodegradation of perfluorooctanoic acid
in Catalysis Today
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Gatto, Sara; Sansotera, Maurizio; Persico, Federico; Gola, Massimo; Pirola, Carlo; Panzeri, Walter; Navarrini, Walter; Bianchi, Claudia L. (literal)
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- University of Milan; Polytechnic University of Milan; Consorzio Interuniv Nazl Sci & Tecnol Mat INSTM; Consiglio Nazionale delle Ricerche (CNR) (literal)
- Titolo
- Surface fluorination on TiO2 catalyst induced by photodegradation of perfluorooctanoic acid (literal)
- Abstract
- The photoabatement of perfluorooctanoic acid in aqueous solution has been performed with a commercial nano-sized TiO2-based photocatalyst content of 0.66 g/L under an UV irradiation of 95 W/m(2). PFOA degradation intermediates were investigated by HPLC-MS and F-19-NMR analysis. Evidences of a degradation mechanism based on two competitive pathways are discussed: photo-redox and beta-scission pathways. Shorter perfluorinated carboxylic acids, CnF2n+1 COOH (n = 1-6), as expected degradation intermediates, were identified and their concentration trends over time were determined. The apparent pseudo-first order kinetic constant expressed as rate of PFOA disappearance was also measured: k(app)0.1296 h(-1). The influence of fluoride ions on TiO2 surface was analyzed by XPS technique, revealing a surface modification that affects the performances of the catalyst. (C) 2014 Elsevier B.V. All rights reserved. (literal)
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