Fabrication of wire mesh-supported ZnO photocatalysts protected against photocorrosion

In this work a catalyst consisting of high surface area ZnO nanoflowers supported on a stainless steel wire mesh was synthesized by hydrothermal growth, and tested for the catalytic photodegradation of methylene blue under UV irradiation. The stability of the photocatalyst was evaluated by assessing...

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Autores: Vu, Thi Tan, Río, Laura del, Valdés-Solís Iglesias, Teresa, Marbán Calzón, Gregorio
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/111010
Acceso en línea:http://hdl.handle.net/10261/111010
Access Level:acceso abierto
Palabra clave:Methylene blue
Photocatalysis
Photocorrosion
ZnO
Stainless steel wire mesh
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spelling Fabrication of wire mesh-supported ZnO photocatalysts protected against photocorrosionVu, Thi TanRío, Laura delValdés-Solís Iglesias, TeresaMarbán Calzón, GregorioMethylene bluePhotocatalysisPhotocorrosionZnOStainless steel wire meshIn this work a catalyst consisting of high surface area ZnO nanoflowers supported on a stainless steel wire mesh was synthesized by hydrothermal growth, and tested for the catalytic photodegradation of methylene blue under UV irradiation. The stability of the photocatalyst was evaluated by assessing the evolution over several reaction stages of catalytic activity and ZnO loss. The initial high activity of this catalyst was followed by a significant decrease after successive reaction cycles due to the dissolution of the ZnO as a consequence of photocorrosion. Impregnation of the catalyst with small amounts of silver enhanced its initial catalytic activity, but failed to produce the photostabilisation of the catalyst that has been reported in the literature. Dip-coating the photocatalyst (either undoped or silver doped) with a diluted polysiloxane solution produced a transparent polysiloxane coating that completely prevented photocorrosion and allowed a stable catalytic activity to be maintained over 8 reaction stages at values higher than those obtained with uncoated catalysts after just 2–3 reactions stages with negligible loss of ZnO.The financial support for this research work provided by the Spanish MEC (CTQ2011-24776) is gratefully acknowledged. Tan T. Vu is grateful to CSIC for the award of a JAE predoc grant.Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201520152013info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/111010reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.apcatb.2013.04.023Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1110102026-05-22T06:33:51Z
dc.title.none.fl_str_mv Fabrication of wire mesh-supported ZnO photocatalysts protected against photocorrosion
title Fabrication of wire mesh-supported ZnO photocatalysts protected against photocorrosion
spellingShingle Fabrication of wire mesh-supported ZnO photocatalysts protected against photocorrosion
Vu, Thi Tan
Methylene blue
Photocatalysis
Photocorrosion
ZnO
Stainless steel wire mesh
title_short Fabrication of wire mesh-supported ZnO photocatalysts protected against photocorrosion
title_full Fabrication of wire mesh-supported ZnO photocatalysts protected against photocorrosion
title_fullStr Fabrication of wire mesh-supported ZnO photocatalysts protected against photocorrosion
title_full_unstemmed Fabrication of wire mesh-supported ZnO photocatalysts protected against photocorrosion
title_sort Fabrication of wire mesh-supported ZnO photocatalysts protected against photocorrosion
dc.creator.none.fl_str_mv Vu, Thi Tan
Río, Laura del
Valdés-Solís Iglesias, Teresa
Marbán Calzón, Gregorio
author Vu, Thi Tan
author_facet Vu, Thi Tan
Río, Laura del
Valdés-Solís Iglesias, Teresa
Marbán Calzón, Gregorio
author_role author
author2 Río, Laura del
Valdés-Solís Iglesias, Teresa
Marbán Calzón, Gregorio
author2_role author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Methylene blue
Photocatalysis
Photocorrosion
ZnO
Stainless steel wire mesh
topic Methylene blue
Photocatalysis
Photocorrosion
ZnO
Stainless steel wire mesh
description In this work a catalyst consisting of high surface area ZnO nanoflowers supported on a stainless steel wire mesh was synthesized by hydrothermal growth, and tested for the catalytic photodegradation of methylene blue under UV irradiation. The stability of the photocatalyst was evaluated by assessing the evolution over several reaction stages of catalytic activity and ZnO loss. The initial high activity of this catalyst was followed by a significant decrease after successive reaction cycles due to the dissolution of the ZnO as a consequence of photocorrosion. Impregnation of the catalyst with small amounts of silver enhanced its initial catalytic activity, but failed to produce the photostabilisation of the catalyst that has been reported in the literature. Dip-coating the photocatalyst (either undoped or silver doped) with a diluted polysiloxane solution produced a transparent polysiloxane coating that completely prevented photocorrosion and allowed a stable catalytic activity to be maintained over 8 reaction stages at values higher than those obtained with uncoated catalysts after just 2–3 reactions stages with negligible loss of ZnO.
publishDate 2013
dc.date.none.fl_str_mv 2013
2015
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/111010
url http://hdl.handle.net/10261/111010
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.apcatb.2013.04.023
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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