Impact of the duty cycle on the morphology and photocatalytic properties of S-TiO2 obtained by plasma electrolytic oxidation to treat real electroplating wastewater contaminated wi...
- Autores
- Vargas Villanueva, Steven; Velásquez Tamayo, Juan Pablo; Torres Cerón, Darwin Augusto; Mercado, D. Fabio; Torres Palma, Ricardo A.; Riassetto, David; Riva, Jullieta Soledad; Amaya Roncancio, S.; Castilla Acevedo, Samir Fernando; Restrepo Parra, Elisabeth
- Año de publicación
- 2023
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- This work reports S-TiO2 doped coatings to reduce Cr6+ to Cr3+ obtained from a Ti electrode through the Plasma Electrolytic Oxidation (PEO) process. The Ti sheets (20 × 20 × 1 mm) were submerged on 0.1 M H2SO4, and values of the duty cycle from 2% to 50% were applied to obtain various materials. SEM, XRD, AFM, XPS, and DRS techniques were used to characterize the resultant surfaces. It was observed that the duty cycle strongly influences the crystalline/amorphous ratio, anatase/rutile ratio, porosity density, pores size distribution, and surface roughness. Besides, it is explained that the introduction of SO42- into the TiO2 structure can take place either in the Ti or O places in the crystalline lattice. All materials showed photocatalytic properties to reduce Cr6+ to Cr3+ under UVC light (254 nm), decreasing the efficiency with the increase of the duty cycle. Additionally, the introduction of EDTA showed a positive synergy with the heterogeneous photocatalytic process when the material was obtained with the highest duty cycle. This last result was attributed to the relatively low bandgap and the high recombination rate; furthermore, EDTA acts as holes and hydroxyl radical scavenger. Thus, the photoelectrochemical system for the treatment of wastewater was evaluated, and again, the same materials showed the highest performance. In the same way, the re-use of the material obtained with the 2% duty cycle was tested, getting satisfactory results, obtaining 96.14 ± 2.77% Cr6+ reduction even after seven cycles of reuse.
Fil: Vargas Villanueva, Steven. Universidad Nacional de Colombia Manizales; Colombia
Fil: Velásquez Tamayo, Juan Pablo. Universidad Nacional de Colombia Manizales; Colombia
Fil: Torres Cerón, Darwin Augusto. Universidad Nacional de Colombia Manizales; Colombia
Fil: Mercado, D. Fabio. Universidad de Antioquia. Facultad de Ciencias Exactas y Naturales;
Fil: Torres Palma, Ricardo A.. Universidad de Antioquia. Facultad de Ciencias Exactas y Naturales;
Fil: Riassetto, David. Universidad Nacional de Colombia Manizales; Colombia
Fil: Riva, Jullieta Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Amaya Roncancio, S.. Universidad Nacional de Colombia Manizales; Colombia
Fil: Castilla Acevedo, Samir Fernando. Universidad Nacional de Colombia Manizales; Colombia
Fil: Restrepo Parra, Elisabeth. Universidad Nacional de Colombia Manizales; Colombia - Materia
-
CR6+
DUTY CYCLE
PEO
REDUCTION
S-TIO2
WASTEWATER - Nivel de accesibilidad
- acceso embargado
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/226690
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oai:ri.conicet.gov.ar:11336/226690 |
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3498 |
network_name_str |
CONICET Digital (CONICET) |
spelling |
Impact of the duty cycle on the morphology and photocatalytic properties of S-TiO2 obtained by plasma electrolytic oxidation to treat real electroplating wastewater contaminated with Cr6+Vargas Villanueva, StevenVelásquez Tamayo, Juan PabloTorres Cerón, Darwin AugustoMercado, D. FabioTorres Palma, Ricardo A.Riassetto, DavidRiva, Jullieta SoledadAmaya Roncancio, S.Castilla Acevedo, Samir FernandoRestrepo Parra, ElisabethCR6+DUTY CYCLEPEOREDUCTIONS-TIO2WASTEWATERhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1This work reports S-TiO2 doped coatings to reduce Cr6+ to Cr3+ obtained from a Ti electrode through the Plasma Electrolytic Oxidation (PEO) process. The Ti sheets (20 × 20 × 1 mm) were submerged on 0.1 M H2SO4, and values of the duty cycle from 2% to 50% were applied to obtain various materials. SEM, XRD, AFM, XPS, and DRS techniques were used to characterize the resultant surfaces. It was observed that the duty cycle strongly influences the crystalline/amorphous ratio, anatase/rutile ratio, porosity density, pores size distribution, and surface roughness. Besides, it is explained that the introduction of SO42- into the TiO2 structure can take place either in the Ti or O places in the crystalline lattice. All materials showed photocatalytic properties to reduce Cr6+ to Cr3+ under UVC light (254 nm), decreasing the efficiency with the increase of the duty cycle. Additionally, the introduction of EDTA showed a positive synergy with the heterogeneous photocatalytic process when the material was obtained with the highest duty cycle. This last result was attributed to the relatively low bandgap and the high recombination rate; furthermore, EDTA acts as holes and hydroxyl radical scavenger. Thus, the photoelectrochemical system for the treatment of wastewater was evaluated, and again, the same materials showed the highest performance. In the same way, the re-use of the material obtained with the 2% duty cycle was tested, getting satisfactory results, obtaining 96.14 ± 2.77% Cr6+ reduction even after seven cycles of reuse.Fil: Vargas Villanueva, Steven. Universidad Nacional de Colombia Manizales; ColombiaFil: Velásquez Tamayo, Juan Pablo. Universidad Nacional de Colombia Manizales; ColombiaFil: Torres Cerón, Darwin Augusto. Universidad Nacional de Colombia Manizales; ColombiaFil: Mercado, D. Fabio. Universidad de Antioquia. Facultad de Ciencias Exactas y Naturales;Fil: Torres Palma, Ricardo A.. Universidad de Antioquia. Facultad de Ciencias Exactas y Naturales;Fil: Riassetto, David. Universidad Nacional de Colombia Manizales; ColombiaFil: Riva, Jullieta Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaFil: Amaya Roncancio, S.. Universidad Nacional de Colombia Manizales; ColombiaFil: Castilla Acevedo, Samir Fernando. Universidad Nacional de Colombia Manizales; ColombiaFil: Restrepo Parra, Elisabeth. Universidad Nacional de Colombia Manizales; ColombiaElsevier2023-10info:eu-repo/date/embargoEnd/2024-05-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/226690Vargas Villanueva, Steven; Velásquez Tamayo, Juan Pablo; Torres Cerón, Darwin Augusto; Mercado, D. Fabio; Torres Palma, Ricardo A.; et al.; Impact of the duty cycle on the morphology and photocatalytic properties of S-TiO2 obtained by plasma electrolytic oxidation to treat real electroplating wastewater contaminated with Cr6+; Elsevier; Journal of Environmental Chemical Engineering; 11; 5; 10-2023; 1-48; 1102462213-3437CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jece.2023.110246info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S2213343723009855info:eu-repo/semantics/embargoedAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:44:57Zoai:ri.conicet.gov.ar:11336/226690instacron: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:34982025-09-29 10:44:57.546CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Impact of the duty cycle on the morphology and photocatalytic properties of S-TiO2 obtained by plasma electrolytic oxidation to treat real electroplating wastewater contaminated with Cr6+ |
title |
Impact of the duty cycle on the morphology and photocatalytic properties of S-TiO2 obtained by plasma electrolytic oxidation to treat real electroplating wastewater contaminated with Cr6+ |
spellingShingle |
Impact of the duty cycle on the morphology and photocatalytic properties of S-TiO2 obtained by plasma electrolytic oxidation to treat real electroplating wastewater contaminated with Cr6+ Vargas Villanueva, Steven CR6+ DUTY CYCLE PEO REDUCTION S-TIO2 WASTEWATER |
title_short |
Impact of the duty cycle on the morphology and photocatalytic properties of S-TiO2 obtained by plasma electrolytic oxidation to treat real electroplating wastewater contaminated with Cr6+ |
title_full |
Impact of the duty cycle on the morphology and photocatalytic properties of S-TiO2 obtained by plasma electrolytic oxidation to treat real electroplating wastewater contaminated with Cr6+ |
title_fullStr |
Impact of the duty cycle on the morphology and photocatalytic properties of S-TiO2 obtained by plasma electrolytic oxidation to treat real electroplating wastewater contaminated with Cr6+ |
title_full_unstemmed |
Impact of the duty cycle on the morphology and photocatalytic properties of S-TiO2 obtained by plasma electrolytic oxidation to treat real electroplating wastewater contaminated with Cr6+ |
title_sort |
Impact of the duty cycle on the morphology and photocatalytic properties of S-TiO2 obtained by plasma electrolytic oxidation to treat real electroplating wastewater contaminated with Cr6+ |
dc.creator.none.fl_str_mv |
Vargas Villanueva, Steven Velásquez Tamayo, Juan Pablo Torres Cerón, Darwin Augusto Mercado, D. Fabio Torres Palma, Ricardo A. Riassetto, David Riva, Jullieta Soledad Amaya Roncancio, S. Castilla Acevedo, Samir Fernando Restrepo Parra, Elisabeth |
author |
Vargas Villanueva, Steven |
author_facet |
Vargas Villanueva, Steven Velásquez Tamayo, Juan Pablo Torres Cerón, Darwin Augusto Mercado, D. Fabio Torres Palma, Ricardo A. Riassetto, David Riva, Jullieta Soledad Amaya Roncancio, S. Castilla Acevedo, Samir Fernando Restrepo Parra, Elisabeth |
author_role |
author |
author2 |
Velásquez Tamayo, Juan Pablo Torres Cerón, Darwin Augusto Mercado, D. Fabio Torres Palma, Ricardo A. Riassetto, David Riva, Jullieta Soledad Amaya Roncancio, S. Castilla Acevedo, Samir Fernando Restrepo Parra, Elisabeth |
author2_role |
author author author author author author author author author |
dc.subject.none.fl_str_mv |
CR6+ DUTY CYCLE PEO REDUCTION S-TIO2 WASTEWATER |
topic |
CR6+ DUTY CYCLE PEO REDUCTION S-TIO2 WASTEWATER |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
This work reports S-TiO2 doped coatings to reduce Cr6+ to Cr3+ obtained from a Ti electrode through the Plasma Electrolytic Oxidation (PEO) process. The Ti sheets (20 × 20 × 1 mm) were submerged on 0.1 M H2SO4, and values of the duty cycle from 2% to 50% were applied to obtain various materials. SEM, XRD, AFM, XPS, and DRS techniques were used to characterize the resultant surfaces. It was observed that the duty cycle strongly influences the crystalline/amorphous ratio, anatase/rutile ratio, porosity density, pores size distribution, and surface roughness. Besides, it is explained that the introduction of SO42- into the TiO2 structure can take place either in the Ti or O places in the crystalline lattice. All materials showed photocatalytic properties to reduce Cr6+ to Cr3+ under UVC light (254 nm), decreasing the efficiency with the increase of the duty cycle. Additionally, the introduction of EDTA showed a positive synergy with the heterogeneous photocatalytic process when the material was obtained with the highest duty cycle. This last result was attributed to the relatively low bandgap and the high recombination rate; furthermore, EDTA acts as holes and hydroxyl radical scavenger. Thus, the photoelectrochemical system for the treatment of wastewater was evaluated, and again, the same materials showed the highest performance. In the same way, the re-use of the material obtained with the 2% duty cycle was tested, getting satisfactory results, obtaining 96.14 ± 2.77% Cr6+ reduction even after seven cycles of reuse. Fil: Vargas Villanueva, Steven. Universidad Nacional de Colombia Manizales; Colombia Fil: Velásquez Tamayo, Juan Pablo. Universidad Nacional de Colombia Manizales; Colombia Fil: Torres Cerón, Darwin Augusto. Universidad Nacional de Colombia Manizales; Colombia Fil: Mercado, D. Fabio. Universidad de Antioquia. Facultad de Ciencias Exactas y Naturales; Fil: Torres Palma, Ricardo A.. Universidad de Antioquia. Facultad de Ciencias Exactas y Naturales; Fil: Riassetto, David. Universidad Nacional de Colombia Manizales; Colombia Fil: Riva, Jullieta Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina Fil: Amaya Roncancio, S.. Universidad Nacional de Colombia Manizales; Colombia Fil: Castilla Acevedo, Samir Fernando. Universidad Nacional de Colombia Manizales; Colombia Fil: Restrepo Parra, Elisabeth. Universidad Nacional de Colombia Manizales; Colombia |
description |
This work reports S-TiO2 doped coatings to reduce Cr6+ to Cr3+ obtained from a Ti electrode through the Plasma Electrolytic Oxidation (PEO) process. The Ti sheets (20 × 20 × 1 mm) were submerged on 0.1 M H2SO4, and values of the duty cycle from 2% to 50% were applied to obtain various materials. SEM, XRD, AFM, XPS, and DRS techniques were used to characterize the resultant surfaces. It was observed that the duty cycle strongly influences the crystalline/amorphous ratio, anatase/rutile ratio, porosity density, pores size distribution, and surface roughness. Besides, it is explained that the introduction of SO42- into the TiO2 structure can take place either in the Ti or O places in the crystalline lattice. All materials showed photocatalytic properties to reduce Cr6+ to Cr3+ under UVC light (254 nm), decreasing the efficiency with the increase of the duty cycle. Additionally, the introduction of EDTA showed a positive synergy with the heterogeneous photocatalytic process when the material was obtained with the highest duty cycle. This last result was attributed to the relatively low bandgap and the high recombination rate; furthermore, EDTA acts as holes and hydroxyl radical scavenger. Thus, the photoelectrochemical system for the treatment of wastewater was evaluated, and again, the same materials showed the highest performance. In the same way, the re-use of the material obtained with the 2% duty cycle was tested, getting satisfactory results, obtaining 96.14 ± 2.77% Cr6+ reduction even after seven cycles of reuse. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-10 info:eu-repo/date/embargoEnd/2024-05-01 |
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/11336/226690 Vargas Villanueva, Steven; Velásquez Tamayo, Juan Pablo; Torres Cerón, Darwin Augusto; Mercado, D. Fabio; Torres Palma, Ricardo A.; et al.; Impact of the duty cycle on the morphology and photocatalytic properties of S-TiO2 obtained by plasma electrolytic oxidation to treat real electroplating wastewater contaminated with Cr6+; Elsevier; Journal of Environmental Chemical Engineering; 11; 5; 10-2023; 1-48; 110246 2213-3437 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/226690 |
identifier_str_mv |
Vargas Villanueva, Steven; Velásquez Tamayo, Juan Pablo; Torres Cerón, Darwin Augusto; Mercado, D. Fabio; Torres Palma, Ricardo A.; et al.; Impact of the duty cycle on the morphology and photocatalytic properties of S-TiO2 obtained by plasma electrolytic oxidation to treat real electroplating wastewater contaminated with Cr6+; Elsevier; Journal of Environmental Chemical Engineering; 11; 5; 10-2023; 1-48; 110246 2213-3437 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jece.2023.110246 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S2213343723009855 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/embargoedAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
eu_rights_str_mv |
embargoedAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
dc.format.none.fl_str_mv |
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 |
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1844614488027824128 |
score |
13.070432 |