Photocatalytic Inactivation of Bacterial Spores using TiO2 Films with Silver Deposits

Autores
Zacarias, Silvia Mercedes; Satuf, María Lucila; Vaccari, María C.; Alfano, Orlando Mario
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The present work evaluates the enhancement of the photocatalytic inactivation of bacterial spores employing TiO2 films with silver deposits compared to TiO2 films without metal deposition. Bacillus subtilis spores spread over TiO2 films with different silver contents were irradiated with artificial UV-A light. The performances of the coatings were evaluated by the quantum efficiency parameter, which relates the inactivation rate with the radiation absorption rate by the coating. Spectral diffuse transmittance and reflectance measurements of the films were carried out to evaluate the fraction of energy absorbed by the coatings. TiO2 and Ag/TiO2 films characterization also included X-Ray Diffraction (XRD), Atomic Force Microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and Scanning Electron Microscopy (SEM). A notable increase in the photocatalytic inactivation was observed by increasing the silver content of the coatings, reaching a maximum quantum efficiency with the sample containing 1.09 wt.% Ag/TiO2. The addition of higher amounts of silver rendered lower inactivation, thus indicating the existence of an optimum Ag/TiO2 relation.
Fil: Zacarias, Silvia Mercedes. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico Para la Industria Química (i); Argentina
Fil: Satuf, María Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico Para la Industria Química (i); Argentina
Fil: Vaccari, María C.. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas; Argentina
Fil: Alfano, Orlando Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico Para la Industria Química (i); Argentina
Materia
Titanium Dioxide
Silver
Bacillus Subtilis Spores
Quantum Efficiency
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/10034
Acceder
id CONICETDig_dcd5ac81641d8889962bbc25ed00b631
oai_identifier_str oai:ri.conicet.gov.ar:11336/10034
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Photocatalytic Inactivation of Bacterial Spores using TiO2 Films with Silver DepositsZacarias, Silvia MercedesSatuf, María LucilaVaccari, María C.Alfano, Orlando MarioTitanium DioxideSilverBacillus Subtilis SporesQuantum Efficiencyhttps://purl.org/becyt/ford/2.7https://purl.org/becyt/ford/2The present work evaluates the enhancement of the photocatalytic inactivation of bacterial spores employing TiO2 films with silver deposits compared to TiO2 films without metal deposition. Bacillus subtilis spores spread over TiO2 films with different silver contents were irradiated with artificial UV-A light. The performances of the coatings were evaluated by the quantum efficiency parameter, which relates the inactivation rate with the radiation absorption rate by the coating. Spectral diffuse transmittance and reflectance measurements of the films were carried out to evaluate the fraction of energy absorbed by the coatings. TiO2 and Ag/TiO2 films characterization also included X-Ray Diffraction (XRD), Atomic Force Microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and Scanning Electron Microscopy (SEM). A notable increase in the photocatalytic inactivation was observed by increasing the silver content of the coatings, reaching a maximum quantum efficiency with the sample containing 1.09 wt.% Ag/TiO2. The addition of higher amounts of silver rendered lower inactivation, thus indicating the existence of an optimum Ag/TiO2 relation.Fil: Zacarias, Silvia Mercedes. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico Para la Industria Química (i); ArgentinaFil: Satuf, María Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico Para la Industria Química (i); ArgentinaFil: Vaccari, María C.. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas; ArgentinaFil: Alfano, Orlando Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico Para la Industria Química (i); ArgentinaElsevier2015-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/10034Zacarias, Silvia Mercedes; Satuf, María Lucila; Vaccari, María C.; Alfano, Orlando Mario; Photocatalytic Inactivation of Bacterial Spores using TiO2 Films with Silver Deposits; Elsevier; Chemical Engineering Journal; 266; 1-2015; 133-1401385-8947enginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.cej.2014.12.074info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1385894714016970info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:52:36Zoai:ri.conicet.gov.ar:11336/10034instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:52:36.926CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Photocatalytic Inactivation of Bacterial Spores using TiO2 Films with Silver Deposits
title Photocatalytic Inactivation of Bacterial Spores using TiO2 Films with Silver Deposits
spellingShingle Photocatalytic Inactivation of Bacterial Spores using TiO2 Films with Silver Deposits
Zacarias, Silvia Mercedes
Titanium Dioxide
Silver
Bacillus Subtilis Spores
Quantum Efficiency
title_short Photocatalytic Inactivation of Bacterial Spores using TiO2 Films with Silver Deposits
title_full Photocatalytic Inactivation of Bacterial Spores using TiO2 Films with Silver Deposits
title_fullStr Photocatalytic Inactivation of Bacterial Spores using TiO2 Films with Silver Deposits
title_full_unstemmed Photocatalytic Inactivation of Bacterial Spores using TiO2 Films with Silver Deposits
title_sort Photocatalytic Inactivation of Bacterial Spores using TiO2 Films with Silver Deposits
dc.creator.none.fl_str_mv Zacarias, Silvia Mercedes
Satuf, María Lucila
Vaccari, María C.
Alfano, Orlando Mario
author Zacarias, Silvia Mercedes
author_facet Zacarias, Silvia Mercedes
Satuf, María Lucila
Vaccari, María C.
Alfano, Orlando Mario
author_role author
author2 Satuf, María Lucila
Vaccari, María C.
Alfano, Orlando Mario
author2_role author
author
author
dc.subject.none.fl_str_mv Titanium Dioxide
Silver
Bacillus Subtilis Spores
Quantum Efficiency
topic Titanium Dioxide
Silver
Bacillus Subtilis Spores
Quantum Efficiency
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.7
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The present work evaluates the enhancement of the photocatalytic inactivation of bacterial spores employing TiO2 films with silver deposits compared to TiO2 films without metal deposition. Bacillus subtilis spores spread over TiO2 films with different silver contents were irradiated with artificial UV-A light. The performances of the coatings were evaluated by the quantum efficiency parameter, which relates the inactivation rate with the radiation absorption rate by the coating. Spectral diffuse transmittance and reflectance measurements of the films were carried out to evaluate the fraction of energy absorbed by the coatings. TiO2 and Ag/TiO2 films characterization also included X-Ray Diffraction (XRD), Atomic Force Microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and Scanning Electron Microscopy (SEM). A notable increase in the photocatalytic inactivation was observed by increasing the silver content of the coatings, reaching a maximum quantum efficiency with the sample containing 1.09 wt.% Ag/TiO2. The addition of higher amounts of silver rendered lower inactivation, thus indicating the existence of an optimum Ag/TiO2 relation.
Fil: Zacarias, Silvia Mercedes. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico Para la Industria Química (i); Argentina
Fil: Satuf, María Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico Para la Industria Química (i); Argentina
Fil: Vaccari, María C.. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas; Argentina
Fil: Alfano, Orlando Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico Para la Industria Química (i); Argentina
description The present work evaluates the enhancement of the photocatalytic inactivation of bacterial spores employing TiO2 films with silver deposits compared to TiO2 films without metal deposition. Bacillus subtilis spores spread over TiO2 films with different silver contents were irradiated with artificial UV-A light. The performances of the coatings were evaluated by the quantum efficiency parameter, which relates the inactivation rate with the radiation absorption rate by the coating. Spectral diffuse transmittance and reflectance measurements of the films were carried out to evaluate the fraction of energy absorbed by the coatings. TiO2 and Ag/TiO2 films characterization also included X-Ray Diffraction (XRD), Atomic Force Microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and Scanning Electron Microscopy (SEM). A notable increase in the photocatalytic inactivation was observed by increasing the silver content of the coatings, reaching a maximum quantum efficiency with the sample containing 1.09 wt.% Ag/TiO2. The addition of higher amounts of silver rendered lower inactivation, thus indicating the existence of an optimum Ag/TiO2 relation.
publishDate 2015
dc.date.none.fl_str_mv 2015-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/10034
Zacarias, Silvia Mercedes; Satuf, María Lucila; Vaccari, María C.; Alfano, Orlando Mario; Photocatalytic Inactivation of Bacterial Spores using TiO2 Films with Silver Deposits; Elsevier; Chemical Engineering Journal; 266; 1-2015; 133-140
1385-8947
url http://hdl.handle.net/11336/10034
identifier_str_mv Zacarias, Silvia Mercedes; Satuf, María Lucila; Vaccari, María C.; Alfano, Orlando Mario; Photocatalytic Inactivation of Bacterial Spores using TiO2 Films with Silver Deposits; Elsevier; Chemical Engineering Journal; 266; 1-2015; 133-140
1385-8947
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cej.2014.12.074
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1385894714016970
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842269170472845312
score 13.13397

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