Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres

Autores
Fuentes Flores, Keyla Mayerlin; Betancourt Figueroa, Paulino; Marrero, Santiago; Chavarría García, Samuel
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The photocatalytic degradation of phenol in aqueous suspensions of co-doped TiO2 supported on SiO2 spheres was investigated. A novel photocatalyst was prepared combining iron doped TiO2?SiO2 and reduced TiO2?SiO2 by mechanical milling (MM/TiO2?SiO2). All the particles were characterized by BET. nitrogen adsorption, X-ray diffraction, scanning electron microscopy, UV?visible spectroscopy and elemental analysis. Trough XRD patterns it was calculated that 2 nm rutile crystallites were formed onto SiO2 surface, ICP analysis confirmed Ti content near to nominal, while EDX analysis shows a surface content 10 lower, suggesting that the SiO2 limiting the agglomeration of TiO2 particles allowing a good dispersion. Phenol photodegradation was induced by illuminating the coated spheres in aqueous solution with a visible light source. The synthesized TiO2?SiO2 particles appeared to be 1.3 times more efficient in the phenol conversion, as compared to pure rutile particles. According to characterization results, this improvement could be attributed mainly to three factors: an effective transference of charge carriers trough the grain boundaries present between contact points, a photonic behavior evidenced on an increment on UV?vis absorption intensity and the quantum size effect of rutile crystallites coated on SiO2.
Fil: Fuentes Flores, Keyla Mayerlin. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Universidad Central de Venezuela; Venezuela
Fil: Betancourt Figueroa, Paulino. Universidad Central de Venezuela; Venezuela
Fil: Marrero, Santiago. Universidad Central de Venezuela; Venezuela
Fil: Chavarría García, Samuel. Universidad Central de Venezuela; Venezuela
Materia
Photonic Sio2 Spheres
Co-Doped Tio2
Grain Boundaries
Phenol Degradation
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/59231
Acceder
id CONICETDig_ed66663f07591f47ede677a28d1130c9
oai_identifier_str oai:ri.conicet.gov.ar:11336/59231
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheresFuentes Flores, Keyla MayerlinBetancourt Figueroa, PaulinoMarrero, SantiagoChavarría García, SamuelPhotonic Sio2 SpheresCo-Doped Tio2Grain BoundariesPhenol Degradationhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The photocatalytic degradation of phenol in aqueous suspensions of co-doped TiO2 supported on SiO2 spheres was investigated. A novel photocatalyst was prepared combining iron doped TiO2?SiO2 and reduced TiO2?SiO2 by mechanical milling (MM/TiO2?SiO2). All the particles were characterized by BET. nitrogen adsorption, X-ray diffraction, scanning electron microscopy, UV?visible spectroscopy and elemental analysis. Trough XRD patterns it was calculated that 2 nm rutile crystallites were formed onto SiO2 surface, ICP analysis confirmed Ti content near to nominal, while EDX analysis shows a surface content 10 lower, suggesting that the SiO2 limiting the agglomeration of TiO2 particles allowing a good dispersion. Phenol photodegradation was induced by illuminating the coated spheres in aqueous solution with a visible light source. The synthesized TiO2?SiO2 particles appeared to be 1.3 times more efficient in the phenol conversion, as compared to pure rutile particles. According to characterization results, this improvement could be attributed mainly to three factors: an effective transference of charge carriers trough the grain boundaries present between contact points, a photonic behavior evidenced on an increment on UV?vis absorption intensity and the quantum size effect of rutile crystallites coated on SiO2.Fil: Fuentes Flores, Keyla Mayerlin. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Universidad Central de Venezuela; VenezuelaFil: Betancourt Figueroa, Paulino. Universidad Central de Venezuela; VenezuelaFil: Marrero, Santiago. Universidad Central de Venezuela; VenezuelaFil: Chavarría García, Samuel. Universidad Central de Venezuela; VenezuelaSpringer2016-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/59231Fuentes Flores, Keyla Mayerlin; Betancourt Figueroa, Paulino; Marrero, Santiago; Chavarría García, Samuel; Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres; Springer; Reaction Kinetics, Mechanisms and Catalysis; 120; 1; 11-2016; 403-4151878-5190CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s11144-016-1097-3info:eu-repo/semantics/altIdentifier/doi/10.1007/s11144-016-1097-3info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:54:13Zoai:ri.conicet.gov.ar:11336/59231instacron: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 09:54:14.159CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres
title Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres
spellingShingle Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres
Fuentes Flores, Keyla Mayerlin
Photonic Sio2 Spheres
Co-Doped Tio2
Grain Boundaries
Phenol Degradation
title_short Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres
title_full Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres
title_fullStr Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres
title_full_unstemmed Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres
title_sort Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres
dc.creator.none.fl_str_mv Fuentes Flores, Keyla Mayerlin
Betancourt Figueroa, Paulino
Marrero, Santiago
Chavarría García, Samuel
author Fuentes Flores, Keyla Mayerlin
author_facet Fuentes Flores, Keyla Mayerlin
Betancourt Figueroa, Paulino
Marrero, Santiago
Chavarría García, Samuel
author_role author
author2 Betancourt Figueroa, Paulino
Marrero, Santiago
Chavarría García, Samuel
author2_role author
author
author
dc.subject.none.fl_str_mv Photonic Sio2 Spheres
Co-Doped Tio2
Grain Boundaries
Phenol Degradation
topic Photonic Sio2 Spheres
Co-Doped Tio2
Grain Boundaries
Phenol Degradation
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The photocatalytic degradation of phenol in aqueous suspensions of co-doped TiO2 supported on SiO2 spheres was investigated. A novel photocatalyst was prepared combining iron doped TiO2?SiO2 and reduced TiO2?SiO2 by mechanical milling (MM/TiO2?SiO2). All the particles were characterized by BET. nitrogen adsorption, X-ray diffraction, scanning electron microscopy, UV?visible spectroscopy and elemental analysis. Trough XRD patterns it was calculated that 2 nm rutile crystallites were formed onto SiO2 surface, ICP analysis confirmed Ti content near to nominal, while EDX analysis shows a surface content 10 lower, suggesting that the SiO2 limiting the agglomeration of TiO2 particles allowing a good dispersion. Phenol photodegradation was induced by illuminating the coated spheres in aqueous solution with a visible light source. The synthesized TiO2?SiO2 particles appeared to be 1.3 times more efficient in the phenol conversion, as compared to pure rutile particles. According to characterization results, this improvement could be attributed mainly to three factors: an effective transference of charge carriers trough the grain boundaries present between contact points, a photonic behavior evidenced on an increment on UV?vis absorption intensity and the quantum size effect of rutile crystallites coated on SiO2.
Fil: Fuentes Flores, Keyla Mayerlin. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Universidad Central de Venezuela; Venezuela
Fil: Betancourt Figueroa, Paulino. Universidad Central de Venezuela; Venezuela
Fil: Marrero, Santiago. Universidad Central de Venezuela; Venezuela
Fil: Chavarría García, Samuel. Universidad Central de Venezuela; Venezuela
description The photocatalytic degradation of phenol in aqueous suspensions of co-doped TiO2 supported on SiO2 spheres was investigated. A novel photocatalyst was prepared combining iron doped TiO2?SiO2 and reduced TiO2?SiO2 by mechanical milling (MM/TiO2?SiO2). All the particles were characterized by BET. nitrogen adsorption, X-ray diffraction, scanning electron microscopy, UV?visible spectroscopy and elemental analysis. Trough XRD patterns it was calculated that 2 nm rutile crystallites were formed onto SiO2 surface, ICP analysis confirmed Ti content near to nominal, while EDX analysis shows a surface content 10 lower, suggesting that the SiO2 limiting the agglomeration of TiO2 particles allowing a good dispersion. Phenol photodegradation was induced by illuminating the coated spheres in aqueous solution with a visible light source. The synthesized TiO2?SiO2 particles appeared to be 1.3 times more efficient in the phenol conversion, as compared to pure rutile particles. According to characterization results, this improvement could be attributed mainly to three factors: an effective transference of charge carriers trough the grain boundaries present between contact points, a photonic behavior evidenced on an increment on UV?vis absorption intensity and the quantum size effect of rutile crystallites coated on SiO2.
publishDate 2016
dc.date.none.fl_str_mv 2016-11
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/11336/59231
Fuentes Flores, Keyla Mayerlin; Betancourt Figueroa, Paulino; Marrero, Santiago; Chavarría García, Samuel; Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres; Springer; Reaction Kinetics, Mechanisms and Catalysis; 120; 1; 11-2016; 403-415
1878-5190
CONICET Digital
CONICET
url http://hdl.handle.net/11336/59231
identifier_str_mv Fuentes Flores, Keyla Mayerlin; Betancourt Figueroa, Paulino; Marrero, Santiago; Chavarría García, Samuel; Photocatalytic degradation of phenol using doped titania supported on photonic SiO2 spheres; Springer; Reaction Kinetics, Mechanisms and Catalysis; 120; 1; 11-2016; 403-415
1878-5190
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://link.springer.com/article/10.1007/s11144-016-1097-3
info:eu-repo/semantics/altIdentifier/doi/10.1007/s11144-016-1097-3
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
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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