Photocatalytic degradation and mineralization of perfluorooctanoic acid (PFOA) using a composite TiO2 -rGO catalyst

The inherent resistance of perfluoroalkyl substances (PFASs) to biological degradation makes necessary to develop advanced technologies for the abatement of this group of hazardous substances. The present work investigated the photocatalytic decomposition of perfluorooctanoic acid (PFOA) using a com...

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Autores: Gómez Ruiz, Beatriz, Ribao Martínez, Paula, Diban Gómez, Nazely|||0000-0002-2636-6305, Rivero Martínez, María José|||0000-0002-0291-9200, Ortiz Uribe, Inmaculada|||0000-0002-3257-4821, Urtiaga Mendia, Ana María|||0000-0002-8189-9171
Formato: artículo
Fecha de publicación:2018
País:España
Recursos:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/12498
Acesso em linha:http://hdl.handle.net/10902/12498
Access Level:acceso abierto
Palavra-chave:Perfluorooctanoic acid
PFOA
TiO2-rGO
Titanium dioxide
Graphene oxide
Photocatalysis
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spelling Photocatalytic degradation and mineralization of perfluorooctanoic acid (PFOA) using a composite TiO2 -rGO catalystGómez Ruiz, BeatrizRibao Martínez, PaulaDiban Gómez, Nazely|||0000-0002-2636-6305Rivero Martínez, María José|||0000-0002-0291-9200Ortiz Uribe, Inmaculada|||0000-0002-3257-4821Urtiaga Mendia, Ana María|||0000-0002-8189-9171Perfluorooctanoic acidPFOATiO2-rGOTitanium dioxideGraphene oxidePhotocatalysisThe inherent resistance of perfluoroalkyl substances (PFASs) to biological degradation makes necessary to develop advanced technologies for the abatement of this group of hazardous substances. The present work investigated the photocatalytic decomposition of perfluorooctanoic acid (PFOA) using a composite catalyst based on TiO2 and reduced graphene oxide (95% TiO2/5% rGO) that was synthesized using a facile hydrothermal method. The efficient photoactivity of the TiO2-rGO (0.1 g L-1) composite was confirmed for PFOA (0.24 mmol L-1) degradation that reached 93 ± 7% after 12 h of UV-vis irradiation using a medium pressure mercury lamp, a great improvement compared to the TiO2 photocatalysis (24 ± 11% PFOA removal) and direct photolysis (58 ± 9%). These findings indicate that rGO provided the suited properties of TiO2-rGO, possibly as a result of acting as electron acceptor and avoiding the high recombination electron/hole pairs. The release of fluoride and the formation of shorter-chain perfluorocarboxilyc acids, that were progressively eliminated in a good match with the analysed reduction of total organic carbon, is consistent with a step-by-step PFOA decomposition via photogenerated hydroxyl radicals. Finally, the apparent first order rate constants of the TiO2-rGO UV-vis PFOA decompositions, and the intermediate perfluorcarboxylic acids were found to increase as the length of the carbon chain was shorter.Financial support from projects CTM2013-44081-R, CTM2015-69845-R and CTM2016-75509-R (MINECO, SPAIN-FEDER 2014–2020) is acknowledged. B. Gomez thanks the FPI scholarship (BES-2014-071045).ElsevierUniversidad de Cantabria20182018-02-15journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttp://hdl.handle.net/10902/12498Journal of Hazardous Materials, 2018, 344, 950-957reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/124982026-06-02T12:39:31Z
dc.title.none.fl_str_mv Photocatalytic degradation and mineralization of perfluorooctanoic acid (PFOA) using a composite TiO2 -rGO catalyst
title Photocatalytic degradation and mineralization of perfluorooctanoic acid (PFOA) using a composite TiO2 -rGO catalyst
spellingShingle Photocatalytic degradation and mineralization of perfluorooctanoic acid (PFOA) using a composite TiO2 -rGO catalyst
Gómez Ruiz, Beatriz
Perfluorooctanoic acid
PFOA
TiO2-rGO
Titanium dioxide
Graphene oxide
Photocatalysis
title_short Photocatalytic degradation and mineralization of perfluorooctanoic acid (PFOA) using a composite TiO2 -rGO catalyst
title_full Photocatalytic degradation and mineralization of perfluorooctanoic acid (PFOA) using a composite TiO2 -rGO catalyst
title_fullStr Photocatalytic degradation and mineralization of perfluorooctanoic acid (PFOA) using a composite TiO2 -rGO catalyst
title_full_unstemmed Photocatalytic degradation and mineralization of perfluorooctanoic acid (PFOA) using a composite TiO2 -rGO catalyst
title_sort Photocatalytic degradation and mineralization of perfluorooctanoic acid (PFOA) using a composite TiO2 -rGO catalyst
dc.creator.none.fl_str_mv Gómez Ruiz, Beatriz
Ribao Martínez, Paula
Diban Gómez, Nazely|||0000-0002-2636-6305
Rivero Martínez, María José|||0000-0002-0291-9200
Ortiz Uribe, Inmaculada|||0000-0002-3257-4821
Urtiaga Mendia, Ana María|||0000-0002-8189-9171
author Gómez Ruiz, Beatriz
author_facet Gómez Ruiz, Beatriz
Ribao Martínez, Paula
Diban Gómez, Nazely|||0000-0002-2636-6305
Rivero Martínez, María José|||0000-0002-0291-9200
Ortiz Uribe, Inmaculada|||0000-0002-3257-4821
Urtiaga Mendia, Ana María|||0000-0002-8189-9171
author_role author
author2 Ribao Martínez, Paula
Diban Gómez, Nazely|||0000-0002-2636-6305
Rivero Martínez, María José|||0000-0002-0291-9200
Ortiz Uribe, Inmaculada|||0000-0002-3257-4821
Urtiaga Mendia, Ana María|||0000-0002-8189-9171
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad de Cantabria
dc.subject.none.fl_str_mv Perfluorooctanoic acid
PFOA
TiO2-rGO
Titanium dioxide
Graphene oxide
Photocatalysis
topic Perfluorooctanoic acid
PFOA
TiO2-rGO
Titanium dioxide
Graphene oxide
Photocatalysis
description The inherent resistance of perfluoroalkyl substances (PFASs) to biological degradation makes necessary to develop advanced technologies for the abatement of this group of hazardous substances. The present work investigated the photocatalytic decomposition of perfluorooctanoic acid (PFOA) using a composite catalyst based on TiO2 and reduced graphene oxide (95% TiO2/5% rGO) that was synthesized using a facile hydrothermal method. The efficient photoactivity of the TiO2-rGO (0.1 g L-1) composite was confirmed for PFOA (0.24 mmol L-1) degradation that reached 93 ± 7% after 12 h of UV-vis irradiation using a medium pressure mercury lamp, a great improvement compared to the TiO2 photocatalysis (24 ± 11% PFOA removal) and direct photolysis (58 ± 9%). These findings indicate that rGO provided the suited properties of TiO2-rGO, possibly as a result of acting as electron acceptor and avoiding the high recombination electron/hole pairs. The release of fluoride and the formation of shorter-chain perfluorocarboxilyc acids, that were progressively eliminated in a good match with the analysed reduction of total organic carbon, is consistent with a step-by-step PFOA decomposition via photogenerated hydroxyl radicals. Finally, the apparent first order rate constants of the TiO2-rGO UV-vis PFOA decompositions, and the intermediate perfluorcarboxylic acids were found to increase as the length of the carbon chain was shorter.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018-02-15
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10902/12498
url http://hdl.handle.net/10902/12498
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv Journal of Hazardous Materials, 2018, 344, 950-957
reponame:UCrea Repositorio Abierto de la Universidad de Cantabria
instname:Universidad de Cantabria (UC)
instname_str Universidad de Cantabria (UC)
reponame_str UCrea Repositorio Abierto de la Universidad de Cantabria
collection UCrea Repositorio Abierto de la Universidad de Cantabria
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,228081

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