Electrochemically reduced Ti0_2 nanowires decorated with carbon quantum dots for enhanced photocatalytic water splitting

TiO_2 nanowires are frequently used in photoelectrochemical water splitting for their extended area, chemical stability, and adequate band positioning. Yet, limited charge mobility and short electronic carrier lifetimes are recognized as limiting aspects of the material. Herein we present 3 differen...

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Autores:: Polanía Melo, Sergio

Tipo de recurso:

Fecha de publicación:: 2021

Institución:: Universidad de los Andes

Repositorio:: Séneca: repositorio Uniandes

Idioma:: eng

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spelling	Al consultar y hacer uso de este recurso, está aceptando las condiciones de uso establecidas por los autores.http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Ortiz Herrera, Pablo6bb8dec2-d2d6-4bd4-acbe-8d46e598eb42400Polanía Melo, Sergio1ef9b6d5-8212-4615-9e46-7bfc885eb645400Salcedo Galán, FelipeCortés Montañez, María Teresa2021-08-10T18:06:19Z2021-08-10T18:06:19Z2021http://hdl.handle.net/1992/5101923583.pdfinstname:Universidad de los Andesreponame:Repositorio Institucional Sénecarepourl:https://repositorio.uniandes.edu.co/TiO_2 nanowires are frequently used in photoelectrochemical water splitting for their extended area, chemical stability, and adequate band positioning. Yet, limited charge mobility and short electronic carrier lifetimes are recognized as limiting aspects of the material. Herein we present 3 different strategies to overcome these short comings, firstly a morphological and impedance study is conducted to determine the effect of nanowire growth over TiO_2 nanoparticle seeded fluorine tin oxide substrates and post-annealing synthesis. Afterwards, we present a new simple electrochemical reduction procedure for the synthesis of reduced TiO_2 nanowires with enhanced charge transfer capabilities due to the induction of Ti^(+3) defects that serve as hole traps and oxygen vacancies..Los nanocables de TiO_2 se utilizan con frecuencia en la separación de agua por medios fotoelectroquímicos por su área extendida, estabilidad química y posicionamiento adecuado de las bandas de conducción y valencia. Sin embargo, la movilidad de carga limitada y la corta vida útil de los portadores electrónicos son aspectos limitantes del material. Aquí presentamos 3 estrategias diferentes para superar estas deficiencias, en primer lugar se lleva a cabo un estudio morfológico y de impedancia para determinar el efecto del crecimiento de nanocables sobre sustratos de óxido de estaño dopados flúor con nanopartículas de TiO_2 y junto con el efecto de sinterización post-síntesis. Posteriormente, presentamos un nuevo procedimiento de reducción electroquímica simple para la síntesis de nanocables de TiO_2 reducidos con capacidades de transferencia de carga mejoradas debido a la inducción de defectos de Ti ^ (+ 3) que sirven como trampas de huecos y vacantes de oxígeno...Magíster en Ingeniería QuímicaMaestría25 hojasapplication/pdfengUniversidad de los AndesMaestría en Ingeniería QuímicaFacultad de IngenieríaDepartamento de Ingeniería Química y de AlimentosElectrochemically reduced Ti0_2 nanowires decorated with carbon quantum dots for enhanced photocatalytic water splittingTrabajo de grado - Maestríainfo:eu-repo/semantics/masterThesishttp://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/TMDióxido de titanioFotocatálisisNanofibrasMateriales nanoestructuradosFotoelectroquímicaSeparación (Tecnología)Ingeniería201327344PublicationTEXT23583.pdf.txt23583.pdf.txtExtracted texttext/plain109779https://repositorio.uniandes.edu.co/bitstreams/6ea87af6-c00a-4e84-a47c-0fa4266619b8/downloadc4b0f4742acb9d389684b6edfa5eaeacMD54THUMBNAIL23583.pdf.jpg23583.pdf.jpgIM Thumbnailimage/jpeg29943https://repositorio.uniandes.edu.co/bitstreams/d420838a-acd7-43ea-8c88-a549424cb0bf/download7f8043f5f60ccad5bcaf0855b1a89c81MD55ORIGINAL23583.pdfapplication/pdf1347572https://repositorio.uniandes.edu.co/bitstreams/7b4e45bb-3e39-4375-8459-57d6f96bccd0/download6942747df03f206718541c497927c910MD511992/51019oai:repositorio.uniandes.edu.co:1992/510192023-10-10 17:42:04.818http://creativecommons.org/licenses/by-nc-nd/4.0/open.accesshttps://repositorio.uniandes.edu.coRepositorio institucional Sénecaadminrepositorio@uniandes.edu.co
dc.title.spa.fl_str_mv	Electrochemically reduced Ti0_2 nanowires decorated with carbon quantum dots for enhanced photocatalytic water splitting
title	Electrochemically reduced Ti0_2 nanowires decorated with carbon quantum dots for enhanced photocatalytic water splitting
spellingShingle	Electrochemically reduced Ti0_2 nanowires decorated with carbon quantum dots for enhanced photocatalytic water splitting Dióxido de titanio Fotocatálisis Nanofibras Materiales nanoestructurados Fotoelectroquímica Separación (Tecnología) Ingeniería
title_short	Electrochemically reduced Ti0_2 nanowires decorated with carbon quantum dots for enhanced photocatalytic water splitting
title_full	Electrochemically reduced Ti0_2 nanowires decorated with carbon quantum dots for enhanced photocatalytic water splitting
title_fullStr	Electrochemically reduced Ti0_2 nanowires decorated with carbon quantum dots for enhanced photocatalytic water splitting
title_full_unstemmed	Electrochemically reduced Ti0_2 nanowires decorated with carbon quantum dots for enhanced photocatalytic water splitting
title_sort	Electrochemically reduced Ti0_2 nanowires decorated with carbon quantum dots for enhanced photocatalytic water splitting
dc.creator.fl_str_mv	Polanía Melo, Sergio
dc.contributor.advisor.none.fl_str_mv	Ortiz Herrera, Pablo
dc.contributor.author.none.fl_str_mv	Polanía Melo, Sergio
dc.contributor.jury.none.fl_str_mv	Salcedo Galán, Felipe Cortés Montañez, María Teresa
dc.subject.armarc.none.fl_str_mv	Dióxido de titanio Fotocatálisis Nanofibras Materiales nanoestructurados Fotoelectroquímica Separación (Tecnología)
topic	Dióxido de titanio Fotocatálisis Nanofibras Materiales nanoestructurados Fotoelectroquímica Separación (Tecnología) Ingeniería
dc.subject.themes.none.fl_str_mv	Ingeniería
description	TiO_2 nanowires are frequently used in photoelectrochemical water splitting for their extended area, chemical stability, and adequate band positioning. Yet, limited charge mobility and short electronic carrier lifetimes are recognized as limiting aspects of the material. Herein we present 3 different strategies to overcome these short comings, firstly a morphological and impedance study is conducted to determine the effect of nanowire growth over TiO_2 nanoparticle seeded fluorine tin oxide substrates and post-annealing synthesis. Afterwards, we present a new simple electrochemical reduction procedure for the synthesis of reduced TiO_2 nanowires with enhanced charge transfer capabilities due to the induction of Ti^(+3) defects that serve as hole traps and oxygen vacancies..
publishDate	2021
dc.date.accessioned.none.fl_str_mv	2021-08-10T18:06:19Z
dc.date.available.none.fl_str_mv	2021-08-10T18:06:19Z
dc.date.issued.none.fl_str_mv	2021
dc.type.spa.fl_str_mv	Trabajo de grado - Maestría
dc.type.coarversion.fl_str_mv	http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.driver.spa.fl_str_mv	info:eu-repo/semantics/masterThesis
dc.type.content.spa.fl_str_mv	Text
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dc.identifier.uri.none.fl_str_mv	http://hdl.handle.net/1992/51019
dc.identifier.pdf.none.fl_str_mv	23583.pdf
dc.identifier.instname.spa.fl_str_mv	instname:Universidad de los Andes
dc.identifier.reponame.spa.fl_str_mv	reponame:Repositorio Institucional Séneca
dc.identifier.repourl.spa.fl_str_mv	repourl:https://repositorio.uniandes.edu.co/
url	http://hdl.handle.net/1992/51019
identifier_str_mv	23583.pdf instname:Universidad de los Andes reponame:Repositorio Institucional Séneca repourl:https://repositorio.uniandes.edu.co/
dc.language.iso.none.fl_str_mv	eng
language	eng
dc.rights.uri.*.fl_str_mv	http://creativecommons.org/licenses/by-nc-nd/4.0/
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dc.format.extent.none.fl_str_mv	25 hojas
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dc.publisher.none.fl_str_mv	Universidad de los Andes
dc.publisher.program.none.fl_str_mv	Maestría en Ingeniería Química
dc.publisher.faculty.none.fl_str_mv	Facultad de Ingeniería
dc.publisher.department.none.fl_str_mv	Departamento de Ingeniería Química y de Alimentos
publisher.none.fl_str_mv	Universidad de los Andes
institution	Universidad de los Andes
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Electrochemically reduced Ti0_2 nanowires decorated with carbon quantum dots for enhanced photocatalytic water splitting

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