Evaluación de la actividad fotocatalítica de FexOy/TiO2 obtenido a partir de ilmenita proveniente de residuos mineros para la degradación de cianuro disuelto en agua
ilustraciones a color, diagramas, fotografías
- Autores:
-
Henao Hoyos, Yuli Marcela
- Tipo de recurso:
- Doctoral thesis
- Fecha de publicación:
- 2024
- Institución:
- Universidad Nacional de Colombia
- Repositorio:
- Universidad Nacional de Colombia
- Idioma:
- spa
- OAI Identifier:
- oai:repositorio.unal.edu.co:unal/86481
- Palabra clave:
- 540 - Química y ciencias afines::541 - Química física
540 - Química y ciencias afines::549 - Mineralogía
Fotocatálisis
Nanopartículas
Catálisis heterogéneas
Cianuros -- Análisis
Residuos de la minería
Espectrofotometría
Photocatalysis
Nanoparticles
Heterogeneous catalysis
Cyanides -- Analysis
Waste mining
Spectrophotometry
Fotocatálisis heterogénea
Dióxido de titanio
Hierro
Oxidación fotocatalítica
Cianuro
Heterogenous photocatalysis
Titanium dioxide
Iron
Photocatalytic oxidation
Cyanide
Ilmenita
Ilmenite
- Rights
- openAccess
- License
- Atribución-NoComercial-SinDerivadas 4.0 Internacional
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| dc.title.spa.fl_str_mv |
Evaluación de la actividad fotocatalítica de FexOy/TiO2 obtenido a partir de ilmenita proveniente de residuos mineros para la degradación de cianuro disuelto en agua |
| dc.title.translated.spa.fl_str_mv |
Assessment of the photocatalytic activity of FexOy/TiO2 synthesized from ilmenite sourced from mining wastes for the degradation of cyanide dissolved water |
| title |
Evaluación de la actividad fotocatalítica de FexOy/TiO2 obtenido a partir de ilmenita proveniente de residuos mineros para la degradación de cianuro disuelto en agua |
| spellingShingle |
Evaluación de la actividad fotocatalítica de FexOy/TiO2 obtenido a partir de ilmenita proveniente de residuos mineros para la degradación de cianuro disuelto en agua 540 - Química y ciencias afines::541 - Química física 540 - Química y ciencias afines::549 - Mineralogía Fotocatálisis Nanopartículas Catálisis heterogéneas Cianuros -- Análisis Residuos de la minería Espectrofotometría Photocatalysis Nanoparticles Heterogeneous catalysis Cyanides -- Analysis Waste mining Spectrophotometry Fotocatálisis heterogénea Dióxido de titanio Hierro Oxidación fotocatalítica Cianuro Heterogenous photocatalysis Titanium dioxide Iron Photocatalytic oxidation Cyanide Ilmenita Ilmenite |
| title_short |
Evaluación de la actividad fotocatalítica de FexOy/TiO2 obtenido a partir de ilmenita proveniente de residuos mineros para la degradación de cianuro disuelto en agua |
| title_full |
Evaluación de la actividad fotocatalítica de FexOy/TiO2 obtenido a partir de ilmenita proveniente de residuos mineros para la degradación de cianuro disuelto en agua |
| title_fullStr |
Evaluación de la actividad fotocatalítica de FexOy/TiO2 obtenido a partir de ilmenita proveniente de residuos mineros para la degradación de cianuro disuelto en agua |
| title_full_unstemmed |
Evaluación de la actividad fotocatalítica de FexOy/TiO2 obtenido a partir de ilmenita proveniente de residuos mineros para la degradación de cianuro disuelto en agua |
| title_sort |
Evaluación de la actividad fotocatalítica de FexOy/TiO2 obtenido a partir de ilmenita proveniente de residuos mineros para la degradación de cianuro disuelto en agua |
| dc.creator.fl_str_mv |
Henao Hoyos, Yuli Marcela |
| dc.contributor.advisor.spa.fl_str_mv |
Carriazo Baños, José Gregorio Márquez Godoy, Marco Antonio |
| dc.contributor.author.spa.fl_str_mv |
Henao Hoyos, Yuli Marcela |
| dc.contributor.researchgroup.spa.fl_str_mv |
Diseño y Reactividad de Estructuras Sólidas (Lab DRES) Mineralogía aplicada y bioprocesos (GMAB) |
| dc.contributor.orcid.spa.fl_str_mv |
Henao-Hoyos, Yuli Marcela [0000000268628668] |
| dc.contributor.cvlac.spa.fl_str_mv |
Henao Hoyos, Yuli Marcela [0001529361] |
| dc.contributor.researchgate.spa.fl_str_mv |
Henao-Hoyos, Yuli Marcela |
| dc.subject.ddc.spa.fl_str_mv |
540 - Química y ciencias afines::541 - Química física 540 - Química y ciencias afines::549 - Mineralogía |
| topic |
540 - Química y ciencias afines::541 - Química física 540 - Química y ciencias afines::549 - Mineralogía Fotocatálisis Nanopartículas Catálisis heterogéneas Cianuros -- Análisis Residuos de la minería Espectrofotometría Photocatalysis Nanoparticles Heterogeneous catalysis Cyanides -- Analysis Waste mining Spectrophotometry Fotocatálisis heterogénea Dióxido de titanio Hierro Oxidación fotocatalítica Cianuro Heterogenous photocatalysis Titanium dioxide Iron Photocatalytic oxidation Cyanide Ilmenita Ilmenite |
| dc.subject.lemb.spa.fl_str_mv |
Fotocatálisis Nanopartículas Catálisis heterogéneas Cianuros -- Análisis Residuos de la minería Espectrofotometría |
| dc.subject.lemb.eng.fl_str_mv |
Photocatalysis Nanoparticles Heterogeneous catalysis Cyanides -- Analysis Waste mining Spectrophotometry |
| dc.subject.proposal.spa.fl_str_mv |
Fotocatálisis heterogénea Dióxido de titanio Hierro Oxidación fotocatalítica Cianuro |
| dc.subject.proposal.eng.fl_str_mv |
Heterogenous photocatalysis Titanium dioxide Iron Photocatalytic oxidation Cyanide |
| dc.subject.wikidata.spa.fl_str_mv |
Ilmenita |
| dc.subject.wikidata.eng.fl_str_mv |
Ilmenite |
| description |
ilustraciones a color, diagramas, fotografías |
| publishDate |
2024 |
| dc.date.accessioned.none.fl_str_mv |
2024-07-16T20:09:15Z |
| dc.date.available.none.fl_str_mv |
2024-07-16T20:09:15Z |
| dc.date.issued.none.fl_str_mv |
2024-07-08 |
| 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 |
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http://purl.org/redcol/resource_type/TD |
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http://purl.org/coar/resource_type/c_db06 |
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acceptedVersion |
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https://repositorio.unal.edu.co/handle/unal/86481 |
| 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/86481 https://repositorio.unal.edu.co/ |
| identifier_str_mv |
Universidad Nacional de Colombia Repositorio Institucional Universidad Nacional de Colombia |
| dc.language.iso.spa.fl_str_mv |
spa |
| language |
spa |
| dc.relation.references.spa.fl_str_mv |
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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_abf2Carriazo Baños, José Gregorio02cd71bf0b829f5d009e0d2419729392Márquez Godoy, Marco Antoniod4e253d07a48cb9652fd6c366cf4c910600Henao Hoyos, Yuli Marcela1d4493e65049f50efca60ac71113e468Diseño y Reactividad de Estructuras Sólidas (Lab DRES)Mineralogía aplicada y bioprocesos (GMAB)Henao-Hoyos, Yuli Marcela [0000000268628668]Henao Hoyos, Yuli Marcela [0001529361]Henao-Hoyos, Yuli Marcela2024-07-16T20:09:15Z2024-07-16T20:09:15Z2024-07-08https://repositorio.unal.edu.co/handle/unal/86481Universidad Nacional de ColombiaRepositorio Institucional Universidad Nacional de Colombiahttps://repositorio.unal.edu.co/ilustraciones a color, diagramas, fotografíasEn el presente trabajo se estudia la síntesis de catalizadores basados en estructuras de Fe(III)-TiO2 (dióxido de titanio dopado con hierro), obtenidos a partir del mineral natural ilmenita extraída de arenas negras que constituyen un tipo de residuo de la industria minera (de explotación de oro) en la región de El Bagre Antioquia-Colombia. La síntesis se desarrolló mediante la extracción ácida controlada de las especies de titanio-hierro, permitiendo la obtención de catalizadores con diferentes contenidos de hierro. Dichos materiales se estudiaron mediante caracterizaciones, estructurales, superficiales, texturales y morfológicas (DRX, XPS, UV-Vis, TEM, EDX, difracción de electrones, isotermas de adsorción de N2, entre otras). Los resultados indican variaciones importantes en los diferentes sólidos, las cuales son marcadamente relacionables con el desempeño catalítico evaluado. Adicionalmente, se caracterizaron también dos sólidos comerciales (anatasa comercial y Degussa P25), con el objetivo de comparar las diferentes propiedades estudiadas. Los resultados indicaron mejores propiedades texturales y de tamaño de partícula (mayor área y menor tamaño) para la mayoría de los sólidos sintetizados y, de acuerdo al estudio estructural, se evidenció una posible substitución de Fe(III) en la estructura de TiO2 tipo anatasa. Los diferentes catalizadores sintetizados se evaluaron en la reacción de degradación fotocatalítica del ion cianuro (CN-) en medio acuoso, tanto en presencia de luz UV como de luz visible. Los resultados se compararon con las evaluaciones fotocatalíticas de los sólidos de referencia (anatasa comercial y Desgussa P25). Aunque los resultados demostraron una actividad comparable de los sólidos sintetizados con la actividad de la anatasa comercial, e inferior a la del TiO2 Degussa, bajo radiación UV, la actividad catalítica de dichos materiales sintetizados fue superior que la de los sólidos de referencia en presencia de luz visible. Además, los estudios cinéticos realizados mostraron excelente ajuste a la cinética de pseudo-primer orden mediante el modelo de Langmuir-Hinshelwood. Finalmente, se realizó la exploración de diferentes especies químicas involucradas en el mecanismo de reacción para la degradación de cianuro. Para ello, se empleó espectroscopía FTIR en modo de reflectancia difusa, mediante ensayos in situ (método transiente). Dichos experimentos permitieron verificar la desaparición progresiva de cianuro, la aparición de especies transitorias como cianato (CNO-), HCONH2 y NH2OH, entre otras. Adicionalmente, este estudio permitió entender mejor el papel del hierro incorporado en la estructura del TiO2, revelando la participación del Fe(III) estructural en la quimiadsorción del cianuro y su transformación en la superficie. Este resultado junto con aquellos obtenidos para la cinética de reacción, sugieren la participación predominante de un mecanismo tipo Langmuir-Hinshelwood. El presente estudio también permitió comprender mejor la función de los grupos -OH superficiales en el desempeño fotocatalítico de los sólidos. (Texto tomado de la fuente)The present study focuses on the synthesis of catalysts based on structures (iron-doped titanium dioxide), derived from the natural mineral ilmenite extracted from black sands, which constitute a type of waste from the gold mining industry in the El Bagre region of Antioquia, Colombia. The synthesis process involved a controlled acid extraction of titanium-iron species, enabling the production of catalysts with different iron contents. These materials were studied by structural, surface, textural, and morphological characterizations (X-ray diffraction, X-ray photoelectron spectroscopy, UV-Visible spectroscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, electron diffraction, nitrogen adsorption isotherms, among others). The results revealed significant variations among the different solids, which are closely correlated with the evaluated catalytic performance. Additionally, two commercial solids (commercial anatase and Degussa P25) were also characterized for comparing different properties. The findings indicate superior textural properties (higher surface areas) and lower particle sizes for most of the synthesized solids. Furthermore, based on structural analysis, a potential isomorphic substitution of Fe(III) in the anatase-type TiO2 structure was observed. The synthesized catalysts were assessed in the photocatalytic degradation performance of cyanide (CN-) in aqueous medium, under UV radiation, and also using visible light. The results were compared with the photocatalytic performance of the reference solids (commercial anatase and Degussa P25). The findings demonstrated a comparable photo-activity of the synthesized solids with the commercial anatase and a lower activity than TiO2 Degussa under UV irradiation, but the catalytic photo-activity of these synthesized materials surpassed that of the reference solids under visible light irradiation. On the other hand, the kinetic studies demonstrated an excellent correlation with the Langmuir-Hinshelwood model, using a pseudo-first order approximation. Finally, an exploration of different chemical species involved in the reaction mechanism for cyanide degradation was conducted. For this purpose, diffuse reflectance Fourier-transform infrared (FTIR) spectroscopy was employed by in situ measures (transient method). These experiments allowed the verification of the progressive disappearance of cyanide and the emergence of transient species such as cyanate (CNO-), HCONH2, and NH2OH, among others. Additionally, this study enhanced the understanding of the role of iron incorporated into the TiO2 structure, revealing the participation of structural Fe(III) in the chemisorption and transformation of cyanide on the catalyst surface. This result, and those obtained by the kinetic experiments, suggest the predominant occurrence of the Langmuir-Hinshelwood mechanism. This study also provided a better comprehension on the role of surface -OH groups in the photocatalytic performance of the solids. (Texto tomado de la fuente)El Ministerio de Ciencia y Tecnología a través de la convocatoria 785 de 2017 para doctorados nacionalesDoctoradoDoctor en Ciencias - QuímicaFotocatálisis heterogénea con TiO2220 páginasapplication/pdfspaUniversidad Nacional de ColombiaBogotá - Ciencias - Doctorado en Ciencias - QuímicaFacultad de CienciasBogotá, ColombiaUniversidad Nacional de Colombia - Sede Bogotá540 - Química y ciencias afines::541 - Química física540 - Química y ciencias afines::549 - MineralogíaFotocatálisisNanopartículasCatálisis heterogéneasCianuros -- AnálisisResiduos de la mineríaEspectrofotometríaPhotocatalysisNanoparticlesHeterogeneous catalysisCyanides -- AnalysisWaste miningSpectrophotometryFotocatálisis heterogéneaDióxido de titanioHierroOxidación fotocatalíticaCianuroHeterogenous photocatalysisTitanium dioxideIronPhotocatalytic oxidationCyanideIlmenitaIlmeniteEvaluación de la actividad fotocatalítica de FexOy/TiO2 obtenido a partir de ilmenita proveniente de residuos mineros para la degradación de cianuro disuelto en aguaAssessment of the photocatalytic activity of FexOy/TiO2 synthesized from ilmenite sourced from mining wastes for the degradation of cyanide dissolved waterTrabajo de grado - Doctoradoinfo:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_db06Texthttp://purl.org/redcol/resource_type/TDAgency for Toxic Substances and Desease Registry. 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Journal of Catalysis, 246(1), 118–126. https://doi.org/10.1016/j.jcat.2006.11.022Evaluación de la actividad fotocatalítica de FexOy/TiO2 obtenido a partir de ilmenita proveniente de residuos mineros para la degradación de cianuro disuelto en aguaMincienciasEstudiantesInvestigadoresPúblico generalLICENSElicense.txtlicense.txttext/plain; charset=utf-85879https://repositorio.unal.edu.co/bitstream/unal/86481/1/license.txteb34b1cf90b7e1103fc9dfd26be24b4aMD51ORIGINAL1038405009.2024.pdf1038405009.2024.pdfTesis de Doctorado en Ciencias - Químicaapplication/pdf7287511https://repositorio.unal.edu.co/bitstream/unal/86481/2/1038405009.2024.pdf83a5c9ec033c72d3226f6850d476610cMD52THUMBNAIL1038405009.2024.pdf.jpg1038405009.2024.pdf.jpgGenerated Thumbnailimage/jpeg5484https://repositorio.unal.edu.co/bitstream/unal/86481/3/1038405009.2024.pdf.jpg4548a7f48150e373d1e0b0139b3468d7MD53unal/86481oai:repositorio.unal.edu.co:unal/864812024-07-16 23:05:11.483Repositorio Institucional Universidad Nacional de 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