Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid

Autores
Ullah, Sajjad; Sáez Acuña, José Javier; Pasa, André Avelino; Aldabe, Sara Alfonsina; Vela, Maria Elena; Benitez, Guillermo Alfredo; Pereira Rodrigues Filho, Ubirajara
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A versatile layer-by-layer (LbL) procedure for the preparation of highly dispersed, adherent and porous multilayer films of TiO2 nanoparticles (NPs) and phosphotungstic acid (HPW) on a variety of substrates at room temperature was developed based on the use of cellulose phosphate (CP) as an efficient and non-conventional polyelectrolyte. UV/vis absorption spectroscopy confirmed the linear and regular growth of the films with the number of immersion cycles and a strong adsorption ability of CP towards TiO2 NPs. FTIR spectroscopy showed that HPW binds to the surface of TiO2 through the oxygen atom at the corner of the Keggin structure. XPS results showed that the interaction between TiO2 and CP is through Ti?O?P linkage. A model is proposed for the TiO2?HPW interaction based on XPS and FTIR results. FEG/SEM study of the surface morphology revealed a porous film structure with a homogenous distribution of the TiO2 NPs induced by CP. HRTEM studies showed that the resulting composite films consist of crystalline anatase and rutile phases and poly-nano-crystalline HPW with a semi-crystalline TiO2?HPW interface. These CP/TiO2 and CP/TiO2/HPW LbL films showed good photoactivity against both saturated and unsaturated species, for instance, stearic acid (SA), crystal violet (CV) and methylene blue (MB) under UV irradiation. The CP/HPW films formed on bacterial cellulose (BC) showed good photochromic response which is enhanced in presence of TiO2 due to an interfacial electron transfer from TiO2 to HPW. This simple and environmentally safe method can be used to form coatings on a variety of surfaces with photoactive TiO2 and TiO2/HPW films.
Fil: Ullah, Sajjad. Universidade de Sao Paulo; Brasil
Fil: Sáez Acuña, José Javier. Universidade de Sao Paulo; Brasil
Fil: Pasa, André Avelino. Universidade Federal Da Santa Catarina; Brasil
Fil: Aldabe, Sara Alfonsina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de Los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires; Argentina
Fil: Vela, Maria Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Benitez, Guillermo Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
Fil: Pereira Rodrigues Filho, Ubirajara. Universidade de Sao Paulo; Brasil
Materia
CELLULOSE PHOSPHATE
LAYER-BY-LAYER
PHOTOCATALYSIS
PHOTOCHROMISM
TITANIA PHOSPHOTUNGSTIC ACID
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:11336/6365
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/6365
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acidUllah, SajjadSáez Acuña, José JavierPasa, André AvelinoAldabe, Sara AlfonsinaVela, Maria ElenaBenitez, Guillermo AlfredoPereira Rodrigues Filho, UbirajaraCELLULOSE PHOSPHATELAYER-BY-LAYERPHOTOCATALYSISPHOTOCHROMISMTITANIA PHOSPHOTUNGSTIC ACIDhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1A versatile layer-by-layer (LbL) procedure for the preparation of highly dispersed, adherent and porous multilayer films of TiO2 nanoparticles (NPs) and phosphotungstic acid (HPW) on a variety of substrates at room temperature was developed based on the use of cellulose phosphate (CP) as an efficient and non-conventional polyelectrolyte. UV/vis absorption spectroscopy confirmed the linear and regular growth of the films with the number of immersion cycles and a strong adsorption ability of CP towards TiO2 NPs. FTIR spectroscopy showed that HPW binds to the surface of TiO2 through the oxygen atom at the corner of the Keggin structure. XPS results showed that the interaction between TiO2 and CP is through Ti?O?P linkage. A model is proposed for the TiO2?HPW interaction based on XPS and FTIR results. FEG/SEM study of the surface morphology revealed a porous film structure with a homogenous distribution of the TiO2 NPs induced by CP. HRTEM studies showed that the resulting composite films consist of crystalline anatase and rutile phases and poly-nano-crystalline HPW with a semi-crystalline TiO2?HPW interface. These CP/TiO2 and CP/TiO2/HPW LbL films showed good photoactivity against both saturated and unsaturated species, for instance, stearic acid (SA), crystal violet (CV) and methylene blue (MB) under UV irradiation. The CP/HPW films formed on bacterial cellulose (BC) showed good photochromic response which is enhanced in presence of TiO2 due to an interfacial electron transfer from TiO2 to HPW. This simple and environmentally safe method can be used to form coatings on a variety of surfaces with photoactive TiO2 and TiO2/HPW films.Fil: Ullah, Sajjad. Universidade de Sao Paulo; BrasilFil: Sáez Acuña, José Javier. Universidade de Sao Paulo; BrasilFil: Pasa, André Avelino. Universidade Federal Da Santa Catarina; BrasilFil: Aldabe, Sara Alfonsina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de Los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires; ArgentinaFil: Vela, Maria Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Benitez, Guillermo Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; ArgentinaFil: Pereira Rodrigues Filho, Ubirajara. Universidade de Sao Paulo; BrasilElsevier Science2013-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/6365Ullah, Sajjad; Sáez Acuña, José Javier; Pasa, André Avelino; Aldabe, Sara Alfonsina; Vela, Maria Elena; et al.; Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid; Elsevier Science; Applied Surface Science; 277; 7-2013; 111-1200169-4332enginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.apsusc.2013.04.011info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0169433213006867info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:57:17Zoai:ri.conicet.gov.ar:11336/6365instacron: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 09:57:18.101CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid
title Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid
spellingShingle Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid
Ullah, Sajjad
CELLULOSE PHOSPHATE
LAYER-BY-LAYER
PHOTOCATALYSIS
PHOTOCHROMISM
TITANIA PHOSPHOTUNGSTIC ACID
title_short Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid
title_full Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid
title_fullStr Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid
title_full_unstemmed Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid
title_sort Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid
dc.creator.none.fl_str_mv Ullah, Sajjad
Sáez Acuña, José Javier
Pasa, André Avelino
Aldabe, Sara Alfonsina
Vela, Maria Elena
Benitez, Guillermo Alfredo
Pereira Rodrigues Filho, Ubirajara
author Ullah, Sajjad
author_facet Ullah, Sajjad
Sáez Acuña, José Javier
Pasa, André Avelino
Aldabe, Sara Alfonsina
Vela, Maria Elena
Benitez, Guillermo Alfredo
Pereira Rodrigues Filho, Ubirajara
author_role author
author2 Sáez Acuña, José Javier
Pasa, André Avelino
Aldabe, Sara Alfonsina
Vela, Maria Elena
Benitez, Guillermo Alfredo
Pereira Rodrigues Filho, Ubirajara
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv CELLULOSE PHOSPHATE
LAYER-BY-LAYER
PHOTOCATALYSIS
PHOTOCHROMISM
TITANIA PHOSPHOTUNGSTIC ACID
topic CELLULOSE PHOSPHATE
LAYER-BY-LAYER
PHOTOCATALYSIS
PHOTOCHROMISM
TITANIA PHOSPHOTUNGSTIC ACID
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A versatile layer-by-layer (LbL) procedure for the preparation of highly dispersed, adherent and porous multilayer films of TiO2 nanoparticles (NPs) and phosphotungstic acid (HPW) on a variety of substrates at room temperature was developed based on the use of cellulose phosphate (CP) as an efficient and non-conventional polyelectrolyte. UV/vis absorption spectroscopy confirmed the linear and regular growth of the films with the number of immersion cycles and a strong adsorption ability of CP towards TiO2 NPs. FTIR spectroscopy showed that HPW binds to the surface of TiO2 through the oxygen atom at the corner of the Keggin structure. XPS results showed that the interaction between TiO2 and CP is through Ti?O?P linkage. A model is proposed for the TiO2?HPW interaction based on XPS and FTIR results. FEG/SEM study of the surface morphology revealed a porous film structure with a homogenous distribution of the TiO2 NPs induced by CP. HRTEM studies showed that the resulting composite films consist of crystalline anatase and rutile phases and poly-nano-crystalline HPW with a semi-crystalline TiO2?HPW interface. These CP/TiO2 and CP/TiO2/HPW LbL films showed good photoactivity against both saturated and unsaturated species, for instance, stearic acid (SA), crystal violet (CV) and methylene blue (MB) under UV irradiation. The CP/HPW films formed on bacterial cellulose (BC) showed good photochromic response which is enhanced in presence of TiO2 due to an interfacial electron transfer from TiO2 to HPW. This simple and environmentally safe method can be used to form coatings on a variety of surfaces with photoactive TiO2 and TiO2/HPW films.
Fil: Ullah, Sajjad. Universidade de Sao Paulo; Brasil
Fil: Sáez Acuña, José Javier. Universidade de Sao Paulo; Brasil
Fil: Pasa, André Avelino. Universidade Federal Da Santa Catarina; Brasil
Fil: Aldabe, Sara Alfonsina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de Los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires; Argentina
Fil: Vela, Maria Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Benitez, Guillermo Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
Fil: Pereira Rodrigues Filho, Ubirajara. Universidade de Sao Paulo; Brasil
description A versatile layer-by-layer (LbL) procedure for the preparation of highly dispersed, adherent and porous multilayer films of TiO2 nanoparticles (NPs) and phosphotungstic acid (HPW) on a variety of substrates at room temperature was developed based on the use of cellulose phosphate (CP) as an efficient and non-conventional polyelectrolyte. UV/vis absorption spectroscopy confirmed the linear and regular growth of the films with the number of immersion cycles and a strong adsorption ability of CP towards TiO2 NPs. FTIR spectroscopy showed that HPW binds to the surface of TiO2 through the oxygen atom at the corner of the Keggin structure. XPS results showed that the interaction between TiO2 and CP is through Ti?O?P linkage. A model is proposed for the TiO2?HPW interaction based on XPS and FTIR results. FEG/SEM study of the surface morphology revealed a porous film structure with a homogenous distribution of the TiO2 NPs induced by CP. HRTEM studies showed that the resulting composite films consist of crystalline anatase and rutile phases and poly-nano-crystalline HPW with a semi-crystalline TiO2?HPW interface. These CP/TiO2 and CP/TiO2/HPW LbL films showed good photoactivity against both saturated and unsaturated species, for instance, stearic acid (SA), crystal violet (CV) and methylene blue (MB) under UV irradiation. The CP/HPW films formed on bacterial cellulose (BC) showed good photochromic response which is enhanced in presence of TiO2 due to an interfacial electron transfer from TiO2 to HPW. This simple and environmentally safe method can be used to form coatings on a variety of surfaces with photoactive TiO2 and TiO2/HPW films.
publishDate 2013
dc.date.none.fl_str_mv 2013-07
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/11336/6365
Ullah, Sajjad; Sáez Acuña, José Javier; Pasa, André Avelino; Aldabe, Sara Alfonsina; Vela, Maria Elena; et al.; Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid; Elsevier Science; Applied Surface Science; 277; 7-2013; 111-120
0169-4332
url http://hdl.handle.net/11336/6365
identifier_str_mv Ullah, Sajjad; Sáez Acuña, José Javier; Pasa, André Avelino; Aldabe, Sara Alfonsina; Vela, Maria Elena; et al.; Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid; Elsevier Science; Applied Surface Science; 277; 7-2013; 111-120
0169-4332
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apsusc.2013.04.011
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0169433213006867
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
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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
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score 13.13397

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