Estudio de la actividad fotocatalitica de electrocatalizadores de TiO2 nanoestructurados y modificados en la produccion de hidrogeno

ilustraciones, diagramas, fotografías a blanco y negro

Autores:: Tirano Vanegas, Joaquin Enrique

Tipo de recurso:: Doctoral thesis

Fecha de publicación:: 2022

Institución:: Universidad Nacional de Colombia

Repositorio:: Universidad Nacional de Colombia

Idioma:

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network_acronym_str	UNACIONAL2
network_name_str	Universidad Nacional de Colombia
repository_id_str
dc.title.spa.fl_str_mv	Estudio de la actividad fotocatalitica de electrocatalizadores de TiO2 nanoestructurados y modificados en la produccion de hidrogeno
dc.title.translated.eng.fl_str_mv	Study of the photocatalytic activity of nanoestructured and modified TiO2 electrocatalyst for hydrogen production
title	Estudio de la actividad fotocatalitica de electrocatalizadores de TiO2 nanoestructurados y modificados en la produccion de hidrogeno
spellingShingle	Estudio de la actividad fotocatalitica de electrocatalizadores de TiO2 nanoestructurados y modificados en la produccion de hidrogeno Nanoestructuras Microestructura Catalizadores Fotocatalisis Nanostructures Microstructure Catalysts Photocatalysis Fotoelectrodo Materiales nanoestructurados Nanoparticulas Nanoparticulas de níquel Nanotubos TiO2 Nanoparticles Nanostructured materials Nickel nanoparticles TiO2 nanotubes
title_short	Estudio de la actividad fotocatalitica de electrocatalizadores de TiO2 nanoestructurados y modificados en la produccion de hidrogeno
title_full	Estudio de la actividad fotocatalitica de electrocatalizadores de TiO2 nanoestructurados y modificados en la produccion de hidrogeno
title_fullStr	Estudio de la actividad fotocatalitica de electrocatalizadores de TiO2 nanoestructurados y modificados en la produccion de hidrogeno
title_full_unstemmed	Estudio de la actividad fotocatalitica de electrocatalizadores de TiO2 nanoestructurados y modificados en la produccion de hidrogeno
title_sort	Estudio de la actividad fotocatalitica de electrocatalizadores de TiO2 nanoestructurados y modificados en la produccion de hidrogeno
dc.creator.fl_str_mv	Tirano Vanegas, Joaquin Enrique
dc.contributor.advisor.none.fl_str_mv	Zea Ramirez, Hugo Ricardo
dc.contributor.author.none.fl_str_mv	Tirano Vanegas, Joaquin Enrique
dc.contributor.researchgroup.spa.fl_str_mv	Grupo de Investigación en Materiales, Catálisis y Medio Ambiente
dc.subject.lemb.spa.fl_str_mv	Nanoestructuras Microestructura Catalizadores Fotocatalisis
topic	Nanoestructuras Microestructura Catalizadores Fotocatalisis Nanostructures Microstructure Catalysts Photocatalysis Fotoelectrodo Materiales nanoestructurados Nanoparticulas Nanoparticulas de níquel Nanotubos TiO2 Nanoparticles Nanostructured materials Nickel nanoparticles TiO2 nanotubes
dc.subject.lemb.eng.fl_str_mv	Nanostructures Microstructure Catalysts Photocatalysis
dc.subject.proposal.spa.fl_str_mv	Fotoelectrodo Materiales nanoestructurados Nanoparticulas Nanoparticulas de níquel Nanotubos TiO2
dc.subject.proposal.eng.fl_str_mv	Nanoparticles Nanostructured materials Nickel nanoparticles TiO2 nanotubes
description	ilustraciones, diagramas, fotografías a blanco y negro
publishDate	2022
dc.date.issued.none.fl_str_mv	2022-11-18
dc.date.accessioned.none.fl_str_mv	2023-08-29T13:33:41Z
dc.date.available.none.fl_str_mv	2023-08-29T13:33:41Z
dc.type.spa.fl_str_mv	Trabajo de grado - Doctorado
dc.type.driver.spa.fl_str_mv	info:eu-repo/semantics/doctoralThesis
dc.type.version.spa.fl_str_mv	info:eu-repo/semantics/acceptedVersion
dc.type.coar.spa.fl_str_mv	http://purl.org/coar/resource_type/c_db06
dc.type.content.spa.fl_str_mv	Text
dc.type.redcol.spa.fl_str_mv	http://purl.org/redcol/resource_type/TD
format	http://purl.org/coar/resource_type/c_db06
status_str	acceptedVersion
dc.identifier.uri.none.fl_str_mv	https://repositorio.unal.edu.co/handle/unal/84607
dc.identifier.instname.spa.fl_str_mv	Universidad Nacional de Colombia
dc.identifier.reponame.spa.fl_str_mv	Repositorio Institucional Universidad Nacional de Colombia
dc.identifier.repourl.spa.fl_str_mv	https://repositorio.unal.edu.co/
url	https://repositorio.unal.edu.co/handle/unal/84607 https://repositorio.unal.edu.co/
identifier_str_mv	Universidad Nacional de Colombia Repositorio Institucional Universidad Nacional de Colombia
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dc.publisher.place.spa.fl_str_mv	Bogotá, Colombia
dc.publisher.branch.spa.fl_str_mv	Universidad Nacional de Colombia - Sede Bogotá
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spelling	Atribución-NoComercial-SinDerivadas 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Zea Ramirez, Hugo Ricardoe584f21ed47d96fb3b42f8367e9d73d5Tirano Vanegas, Joaquin Enrique781a226a61d04414572bfff67a2c2a50Grupo de Investigación en Materiales, Catálisis y Medio Ambiente2023-08-29T13:33:41Z2023-08-29T13:33:41Z2022-11-18https://repositorio.unal.edu.co/handle/unal/84607Universidad Nacional de ColombiaRepositorio Institucional Universidad Nacional de Colombiahttps://repositorio.unal.edu.co/ilustraciones, diagramas, fotografías a blanco y negroilustraciones, diagramas, fotografías a blanco y negroSe obtuvieron nanotubos de TiO2 dopados con níquel, con un notorio desempeño fotocatalítico, gran área superficial y con dimensiones y características controladas, mediante anodización electroquímica. Los resultados complementan el estado del arte de la síntesis de este tipo de nanoestructuras, establece relaciones entre las características morfológicas obtenidas y las variables de síntesis. Estas relaciones permiten establecer zonas de síntesis donde se puede controlar la morfología de los nanotubos. Se discuten los resultados de tratamientos que modifican la estructura cristalina de los nanotubos y su superficie. Se discute el efecto del tratamiento térmico sobre la evolución de la fase anatasa del rutilo en los nanotubos de TiO2. Se establece un protocolo para modificar superficialmente los nanotubos de TiO2 con nanopartículas de níquel, mediante electrodepositación. Para cada tratamiento se realiza una caracterización morfológica, cristalina y elemental de las muestras. Se efectúa la caracterización electroquímica de los fotoelectrodos sintetizados y los efectos de las morfologías de las nanoestructuras sobre su comportamiento fotoelectroquímico. Los análisis revelan el comportamiento eléctrico de las nanoestructuras sintetizadas dentro de una celda fotoelectroquímica, así como el tipo de semiconductor y el rol del níquel en la recombinación de cargas fotogeneradas. Se revisan los circuitos equivalentes que representan el comportamiento de nanotubos modificados con níquel en la producción fotoelectroquímica de hidrógeno. (Texto tomado de la fuente)Nickel-doped TiO2 nanotubes with remarkable photocatalytic performance, large surface area, and controlled dimensions and characteristics were obtained by electrochemical anodization. The results complement the state of the art of the synthesis of this type of nanostructure, establishing relationships between the morphological characteristics obtained and the synthesis variables. These relationships allow for the establishment of synthesis zones where the morphology of the nanotubes can be controlled. The results of treatments that modify the crystalline structure of the nanotubes and their surface are discussed. The effect of thermal treatment on the evolution of the anatase phase in TiO2 nanotubes is also discussed. A protocol is established to superficially modify TiO2 nanotubes with nickel nanoparticles, by using electrodeposition. For each treatment, a morphological, crystalline, and elemental characterization of the samples is carried out. The electrochemical characterization of the synthesized photoelectrodes and the effects of the morphologies of the nanostructures on their photoelectrochemical behavior are also carried out. The analyses reveal the electrical behavior of the nanostructures synthesized within a photoelectrochemical cell, as well as the type of semiconductor and the role of nickel in the recombination of photogenerated charges. Equivalent circuits representing the behavior of nickel-modified nanotubes in the photoelectrochemical production of hydrogen are also reviewed.DoctoradoDoctor en Ingeniería - Ingeniería QuímicaDesarrollo de electrocatalizadores modificados178 páginasapplication/pdfEstudio de la actividad fotocatalitica de electrocatalizadores de TiO2 nanoestructurados y modificados en la produccion de hidrogenoStudy of the photocatalytic activity of nanoestructured and modified TiO2 electrocatalyst for hydrogen productionTrabajo de grado - Doctoradoinfo:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_db06Texthttp://purl.org/redcol/resource_type/TDBogotá - Ingeniería - Doctorado en Ingeniería - Ingeniería QuímicaFacultad de IngenieríaBogotá, ColombiaUniversidad Nacional de Colombia - Sede BogotáA. A. 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Wang, “A Novel Approach to Well-Aligned TiO2 Nanotube Arrays and Their Enhanced Photocatalytic Performances,” AIChE J., vol. 59, no. 6, pp. 2134–2144, 2013.NanoestructurasMicroestructuraCatalizadoresFotocatalisisNanostructuresMicrostructureCatalystsPhotocatalysisFotoelectrodoMateriales nanoestructuradosNanoparticulasNanoparticulas de níquelNanotubos TiO2NanoparticlesNanostructured materialsNickel nanoparticlesTiO2 nanotubesColciencias convocatoria 617LICENSElicense.txtlicense.txttext/plain; charset=utf-85879https://repositorio.unal.edu.co/bitstream/unal/84607/3/license.txteb34b1cf90b7e1103fc9dfd26be24b4aMD53ORIGINAL79614908.2022.pdf79614908.2022.pdfTesis de Doctorado en Ingeniería - Ingeniería Químicaapplication/pdf8480279https://repositorio.unal.edu.co/bitstream/unal/84607/4/79614908.2022.pdf0b70a520796d15f2d748472491a32accMD54THUMBNAIL79614908.2022.pdf.jpg79614908.2022.pdf.jpgGenerated 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Estudio de la actividad fotocatalitica de electrocatalizadores de TiO2 nanoestructurados y modificados en la produccion de hidrogeno

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