1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water

Autores
Cabrera, Julieta; Acosta, Dwight; López, Alcides; Candal, Roberto Jorge; Marchi, María Claudia; García, Pilar; Ríos, Dante; Rodriguez, Juan M.
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
TiO2 nanotubes were synthesized by alkaline hydrothermal treatment of TiO2 nanoparticles with a controlled proportion of anatase and rutile. Tailoring of TiO2 phases was achieved by adjusting the pH and type of acid used in the hydrolysis of titanium isopropoxide (first step in the sol-gel synthesis). The anatase proportion in the precursor nanoparticles was in the 3-100% range. Tube-like nanostructures were obtained with an anatase percentage of 18 or higher while flake-like shapes were obtained when rutile was dominant in the seed. After annealing at 400°C for 2 h, a fraction of nanotubes was conserved in all the samples but, depending on the anatase/rutile ratio in the starting material, spherical and rod-shaped structures were also observed. The photocatalytic activity of 1D nanostructures was evaluated by measuring the deactivation of E. coli in stirred water in the dark and under UV-A/B irradiation. Results show that in addition to the bactericidal activity of TiO2 under UV-A illumination, under dark conditions, the decrease in bacteria viability is ascribed to mechanical stress due to stirring.
Fil: Cabrera, Julieta. Universidad Nacional de Ingeniería; Perú
Fil: Acosta, Dwight. Universidad Nacional Autónoma de México; México
Fil: López, Alcides. Universidad Nacional de Ingeniería; Perú
Fil: Candal, Roberto Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Instituto de Investigación en Ingeniería Ambiental; Argentina
Fil: Marchi, María Claudia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Microscopías Avanzadas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: García, Pilar. Universidad Nacional de Ingeniería; Perú
Fil: Ríos, Dante. Universidad Nacional de Ingeniería; Perú
Fil: Rodriguez, Juan M.. Universidad Nacional de Ingeniería; Perú
Materia
1D TiO2
photocatalysis
hydrothermal
nanotubes
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/96756
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling 1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in waterCabrera, JulietaAcosta, DwightLópez, AlcidesCandal, Roberto JorgeMarchi, María ClaudiaGarcía, PilarRíos, DanteRodriguez, Juan M.1D TiO2photocatalysishydrothermalnanotubeshttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2TiO2 nanotubes were synthesized by alkaline hydrothermal treatment of TiO2 nanoparticles with a controlled proportion of anatase and rutile. Tailoring of TiO2 phases was achieved by adjusting the pH and type of acid used in the hydrolysis of titanium isopropoxide (first step in the sol-gel synthesis). The anatase proportion in the precursor nanoparticles was in the 3-100% range. Tube-like nanostructures were obtained with an anatase percentage of 18 or higher while flake-like shapes were obtained when rutile was dominant in the seed. After annealing at 400°C for 2 h, a fraction of nanotubes was conserved in all the samples but, depending on the anatase/rutile ratio in the starting material, spherical and rod-shaped structures were also observed. The photocatalytic activity of 1D nanostructures was evaluated by measuring the deactivation of E. coli in stirred water in the dark and under UV-A/B irradiation. Results show that in addition to the bactericidal activity of TiO2 under UV-A illumination, under dark conditions, the decrease in bacteria viability is ascribed to mechanical stress due to stirring.Fil: Cabrera, Julieta. Universidad Nacional de Ingeniería; PerúFil: Acosta, Dwight. Universidad Nacional Autónoma de México; MéxicoFil: López, Alcides. Universidad Nacional de Ingeniería; PerúFil: Candal, Roberto Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Instituto de Investigación en Ingeniería Ambiental; ArgentinaFil: Marchi, María Claudia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Microscopías Avanzadas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: García, Pilar. Universidad Nacional de Ingeniería; PerúFil: Ríos, Dante. Universidad Nacional de Ingeniería; PerúFil: Rodriguez, Juan M.. Universidad Nacional de Ingeniería; PerúHindawi Publishing Corporation2018-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/96756Cabrera, Julieta; Acosta, Dwight; López, Alcides; Candal, Roberto Jorge; Marchi, María Claudia; et al.; 1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water; Hindawi Publishing Corporation; International Journal Of Photoenergy; 2018; 7-2018; 1-71110-662XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.hindawi.com/journals/ijp/2018/1862597/info:eu-repo/semantics/altIdentifier/doi/10.1155/2018/1862597info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:54:24Zoai:ri.conicet.gov.ar:11336/96756instacron: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 09:54:24.689CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv 1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water
title 1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water
spellingShingle 1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water
Cabrera, Julieta
1D TiO2
photocatalysis
hydrothermal
nanotubes
title_short 1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water
title_full 1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water
title_fullStr 1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water
title_full_unstemmed 1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water
title_sort 1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water
dc.creator.none.fl_str_mv Cabrera, Julieta
Acosta, Dwight
López, Alcides
Candal, Roberto Jorge
Marchi, María Claudia
García, Pilar
Ríos, Dante
Rodriguez, Juan M.
author Cabrera, Julieta
author_facet Cabrera, Julieta
Acosta, Dwight
López, Alcides
Candal, Roberto Jorge
Marchi, María Claudia
García, Pilar
Ríos, Dante
Rodriguez, Juan M.
author_role author
author2 Acosta, Dwight
López, Alcides
Candal, Roberto Jorge
Marchi, María Claudia
García, Pilar
Ríos, Dante
Rodriguez, Juan M.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv 1D TiO2
photocatalysis
hydrothermal
nanotubes
topic 1D TiO2
photocatalysis
hydrothermal
nanotubes
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv TiO2 nanotubes were synthesized by alkaline hydrothermal treatment of TiO2 nanoparticles with a controlled proportion of anatase and rutile. Tailoring of TiO2 phases was achieved by adjusting the pH and type of acid used in the hydrolysis of titanium isopropoxide (first step in the sol-gel synthesis). The anatase proportion in the precursor nanoparticles was in the 3-100% range. Tube-like nanostructures were obtained with an anatase percentage of 18 or higher while flake-like shapes were obtained when rutile was dominant in the seed. After annealing at 400°C for 2 h, a fraction of nanotubes was conserved in all the samples but, depending on the anatase/rutile ratio in the starting material, spherical and rod-shaped structures were also observed. The photocatalytic activity of 1D nanostructures was evaluated by measuring the deactivation of E. coli in stirred water in the dark and under UV-A/B irradiation. Results show that in addition to the bactericidal activity of TiO2 under UV-A illumination, under dark conditions, the decrease in bacteria viability is ascribed to mechanical stress due to stirring.
Fil: Cabrera, Julieta. Universidad Nacional de Ingeniería; Perú
Fil: Acosta, Dwight. Universidad Nacional Autónoma de México; México
Fil: López, Alcides. Universidad Nacional de Ingeniería; Perú
Fil: Candal, Roberto Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Instituto de Investigación en Ingeniería Ambiental; Argentina
Fil: Marchi, María Claudia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Microscopías Avanzadas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: García, Pilar. Universidad Nacional de Ingeniería; Perú
Fil: Ríos, Dante. Universidad Nacional de Ingeniería; Perú
Fil: Rodriguez, Juan M.. Universidad Nacional de Ingeniería; Perú
description TiO2 nanotubes were synthesized by alkaline hydrothermal treatment of TiO2 nanoparticles with a controlled proportion of anatase and rutile. Tailoring of TiO2 phases was achieved by adjusting the pH and type of acid used in the hydrolysis of titanium isopropoxide (first step in the sol-gel synthesis). The anatase proportion in the precursor nanoparticles was in the 3-100% range. Tube-like nanostructures were obtained with an anatase percentage of 18 or higher while flake-like shapes were obtained when rutile was dominant in the seed. After annealing at 400°C for 2 h, a fraction of nanotubes was conserved in all the samples but, depending on the anatase/rutile ratio in the starting material, spherical and rod-shaped structures were also observed. The photocatalytic activity of 1D nanostructures was evaluated by measuring the deactivation of E. coli in stirred water in the dark and under UV-A/B irradiation. Results show that in addition to the bactericidal activity of TiO2 under UV-A illumination, under dark conditions, the decrease in bacteria viability is ascribed to mechanical stress due to stirring.
publishDate 2018
dc.date.none.fl_str_mv 2018-07
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/11336/96756
Cabrera, Julieta; Acosta, Dwight; López, Alcides; Candal, Roberto Jorge; Marchi, María Claudia; et al.; 1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water; Hindawi Publishing Corporation; International Journal Of Photoenergy; 2018; 7-2018; 1-7
1110-662X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/96756
identifier_str_mv Cabrera, Julieta; Acosta, Dwight; López, Alcides; Candal, Roberto Jorge; Marchi, María Claudia; et al.; 1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water; Hindawi Publishing Corporation; International Journal Of Photoenergy; 2018; 7-2018; 1-7
1110-662X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.hindawi.com/journals/ijp/2018/1862597/
info:eu-repo/semantics/altIdentifier/doi/10.1155/2018/1862597
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Hindawi Publishing Corporation
publisher.none.fl_str_mv Hindawi Publishing Corporation
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_ 1842269285006704640
score 13.13397

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