Sol-gel synthesis of ZnWO4-(ZnO) composite materials. Characterization and photocatalytic properties

ZnWO4 based powder photocatalyst have been successfully prepared by calcining a co-precipitated precursor (ZnWO) obtained from aqueous Zn2+ and WO42− solutions at pH = 7, without surfactants addition. The as-formed sample was characterized by XRD, N2-absorption, SEM, TEM, DRS and XPS. Both technique...

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Detalhes bibliográficos
Autores: Jaramillo-Páez, César, Navío, José Antonio, Puga, Felipe, Hidalgo, M. C.
Tipo de documento: artigo
Estado:Versión aceptada para publicación
Data de publicação:2021
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/410623
Acesso em linha:http://hdl.handle.net/10261/410623
https://api.elsevier.com/content/abstract/scopus_id/85092048833
Access Level:Acceso aberto
Palavra-chave:Methyl orange
Phenol
Photocatalysis
Rhodamine B
ZnO
ZnWO4
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spelling Sol-gel synthesis of ZnWO4-(ZnO) composite materials. Characterization and photocatalytic propertiesJaramillo-Páez, CésarNavío, José AntonioPuga, FelipeHidalgo, M. C.Methyl orangePhenolPhotocatalysisRhodamine BZnOZnWO4ZnWO4 based powder photocatalyst have been successfully prepared by calcining a co-precipitated precursor (ZnWO) obtained from aqueous Zn2+ and WO42− solutions at pH = 7, without surfactants addition. The as-formed sample was characterized by XRD, N2-absorption, SEM, TEM, DRS and XPS. Both techniques, XRD and XPS results showed that prepared sample corresponds to a crystalline, Zn-enriched composition, ZnWO4 indicating the formation of a ZnWO4-(ZnO) composite, whit ca. 10 wt.-% of ZnO confirmed by XRF analysis. Photocatalytic activities towards degradation of Rhodamine B (RhB), Methyl Orange (MO) and Phenol, under UV-illumination, was investigated not only by monitoring the percentages of conversion of substrates, but also by estimating the corresponding percentages of mineralization that accompany the photocatalytic process. Comparative substrate-conversion rates estimated per surface area unit of catalyst, showed that the activity for ZnWO4-(ZnO) composite is similar to that for TiO2(P25), at least for MO and RhB, and even higher that for TiO2(P25) in respect to phenol conversion. By adding TEA to the synthesis procedure, a composite named as ZnWO4-ZnO-(pH = 10)-600 is generated, which has a higher proportion of ZnO (ca. 39 %) and superior specific surface area than the so-called ZnWO4-(ZnO) sample. Furthermore, the photocatalytic degradation of MO using the former material indicates that it is superior to ZnWO4-(ZnO) and even that TiO2(P25) itself under the same operational conditions.XPS and other research services research of CITIUS University of Seville are also acknowledged. We thank the University of Tolima for their economic support in the studies commission of Cesar Augusto Jaramillo Páez. Felipe Puga is grateful for the funding by Scholarships Chile, from the National Agency of Research and Development of Chile (ANID, Chile)Peer reviewedElsevierAgencia Nacional de Investigación y Desarrollo (Chile)Universidad del TolimaNavío, José Antonio [0000-0002-7884-1067]Puga, Felipe [0000-0003-2739-2537]Hidalgo, M. C. [0000-0001-9862-6578]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://hdl.handle.net/10261/410623https://api.elsevier.com/content/abstract/scopus_id/85092048833reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4106232026-05-22T06:33:51Z
dc.title.none.fl_str_mv Sol-gel synthesis of ZnWO4-(ZnO) composite materials. Characterization and photocatalytic properties
title Sol-gel synthesis of ZnWO4-(ZnO) composite materials. Characterization and photocatalytic properties
spellingShingle Sol-gel synthesis of ZnWO4-(ZnO) composite materials. Characterization and photocatalytic properties
Jaramillo-Páez, César
Methyl orange
Phenol
Photocatalysis
Rhodamine B
ZnO
ZnWO4
title_short Sol-gel synthesis of ZnWO4-(ZnO) composite materials. Characterization and photocatalytic properties
title_full Sol-gel synthesis of ZnWO4-(ZnO) composite materials. Characterization and photocatalytic properties
title_fullStr Sol-gel synthesis of ZnWO4-(ZnO) composite materials. Characterization and photocatalytic properties
title_full_unstemmed Sol-gel synthesis of ZnWO4-(ZnO) composite materials. Characterization and photocatalytic properties
title_sort Sol-gel synthesis of ZnWO4-(ZnO) composite materials. Characterization and photocatalytic properties
dc.creator.none.fl_str_mv Jaramillo-Páez, César
Navío, José Antonio
Puga, Felipe
Hidalgo, M. C.
author Jaramillo-Páez, César
author_facet Jaramillo-Páez, César
Navío, José Antonio
Puga, Felipe
Hidalgo, M. C.
author_role author
author2 Navío, José Antonio
Puga, Felipe
Hidalgo, M. C.
author2_role author
author
author
dc.contributor.none.fl_str_mv Agencia Nacional de Investigación y Desarrollo (Chile)
Universidad del Tolima
Navío, José Antonio [0000-0002-7884-1067]
Puga, Felipe [0000-0003-2739-2537]
Hidalgo, M. C. [0000-0001-9862-6578]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Methyl orange
Phenol
Photocatalysis
Rhodamine B
ZnO
ZnWO4
topic Methyl orange
Phenol
Photocatalysis
Rhodamine B
ZnO
ZnWO4
description ZnWO4 based powder photocatalyst have been successfully prepared by calcining a co-precipitated precursor (ZnWO) obtained from aqueous Zn2+ and WO42− solutions at pH = 7, without surfactants addition. The as-formed sample was characterized by XRD, N2-absorption, SEM, TEM, DRS and XPS. Both techniques, XRD and XPS results showed that prepared sample corresponds to a crystalline, Zn-enriched composition, ZnWO4 indicating the formation of a ZnWO4-(ZnO) composite, whit ca. 10 wt.-% of ZnO confirmed by XRF analysis. Photocatalytic activities towards degradation of Rhodamine B (RhB), Methyl Orange (MO) and Phenol, under UV-illumination, was investigated not only by monitoring the percentages of conversion of substrates, but also by estimating the corresponding percentages of mineralization that accompany the photocatalytic process. Comparative substrate-conversion rates estimated per surface area unit of catalyst, showed that the activity for ZnWO4-(ZnO) composite is similar to that for TiO2(P25), at least for MO and RhB, and even higher that for TiO2(P25) in respect to phenol conversion. By adding TEA to the synthesis procedure, a composite named as ZnWO4-ZnO-(pH = 10)-600 is generated, which has a higher proportion of ZnO (ca. 39 %) and superior specific surface area than the so-called ZnWO4-(ZnO) sample. Furthermore, the photocatalytic degradation of MO using the former material indicates that it is superior to ZnWO4-(ZnO) and even that TiO2(P25) itself under the same operational conditions.
publishDate 2021
dc.date.none.fl_str_mv 2021
2025
2025
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/10261/410623
https://api.elsevier.com/content/abstract/scopus_id/85092048833
url http://hdl.handle.net/10261/410623
https://api.elsevier.com/content/abstract/scopus_id/85092048833
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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 15.198674

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