Comparative Study of Catalytic Systems T iO2 and N b2O5

This article discusses the viability of using agents such as niobium photocatalyst in decreasing higher energy of the band gap. To do so competitively withT iO2, the presence of oxidation helpers such as H2O2 and O3 could present surprising results in the catalytic performance due to higher generati...

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Autores:
Barbosa López, Aida Liliana
Castro Sierra, Isel María
Tipo de recurso:
Fecha de publicación:
2012
Institución:
Universidad EAFIT
Repositorio:
Repositorio EAFIT
Idioma:
spa
OAI Identifier:
oai:repository.eafit.edu.co:10784/14456
Acceso en línea:
http://hdl.handle.net/10784/14456
Palabra clave:
Photocatalysis
Ozone
Niobium Oxide
Titanium Oxide
Hydrogen Peroxide
Fotocatálisis
Ozono
Óxido De Niobio
Óxido De Titanio
Peróxido De Hidrógeno
Rights
License
Copyright (c) 2012 Aida Liliana Barbosa López, Isel María Castro Sierra
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network_acronym_str REPOEAFIT2
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dc.title.eng.fl_str_mv Comparative Study of Catalytic Systems T iO2 and N b2O5
dc.title.spa.fl_str_mv Estudio catalítico comparativo de los sistemas TiO2 y Nb2O5 en la degradación de cianuro en función del tipo de oxidante
title Comparative Study of Catalytic Systems T iO2 and N b2O5
spellingShingle Comparative Study of Catalytic Systems T iO2 and N b2O5
Photocatalysis
Ozone
Niobium Oxide
Titanium Oxide
Hydrogen Peroxide
Fotocatálisis
Ozono
Óxido De Niobio
Óxido De Titanio
Peróxido De Hidrógeno
title_short Comparative Study of Catalytic Systems T iO2 and N b2O5
title_full Comparative Study of Catalytic Systems T iO2 and N b2O5
title_fullStr Comparative Study of Catalytic Systems T iO2 and N b2O5
title_full_unstemmed Comparative Study of Catalytic Systems T iO2 and N b2O5
title_sort Comparative Study of Catalytic Systems T iO2 and N b2O5
dc.creator.fl_str_mv Barbosa López, Aida Liliana
Castro Sierra, Isel María
dc.contributor.author.spa.fl_str_mv Barbosa López, Aida Liliana
Castro Sierra, Isel María
dc.contributor.affiliation.spa.fl_str_mv Universidad de Cartagena
dc.subject.keyword.eng.fl_str_mv Photocatalysis
Ozone
Niobium Oxide
Titanium Oxide
Hydrogen Peroxide
topic Photocatalysis
Ozone
Niobium Oxide
Titanium Oxide
Hydrogen Peroxide
Fotocatálisis
Ozono
Óxido De Niobio
Óxido De Titanio
Peróxido De Hidrógeno
dc.subject.keyword.spa.fl_str_mv Fotocatálisis
Ozono
Óxido De Niobio
Óxido De Titanio
Peróxido De Hidrógeno
description This article discusses the viability of using agents such as niobium photocatalyst in decreasing higher energy of the band gap. To do so competitively withT iO2, the presence of oxidation helpers such as H2O2 and O3 could present surprising results in the catalytic performance due to higher generation of OH o radicals. Oxidation helpers are shown to assist in obtaining larger are oxides and textural properties different from commercial niobium oxide, and enhancing its catalytic activity in free cyanide removing. The article presents experimental results of cyanide photodegradation of 100mg/l with Degussa P-25 T iO2 and Nb2O53H2O, using a type CPC photoreactor and sunlight as the radiation source. Taking an inclination equal to Cartagena latitude of 10,450, the results show a clear effect of pH, catalyst type and oxidation auxiliar agenton photodegradation reaction. The ion cyanide reduction of polluted effluent was enhanced by oxidizing agent (O3 and H2O2) addition. This may suggest a greater susceptibility to free cyanide oxidation and cianate indirect oxidation due to higher hydroxyl radical generation, which was induced by H2O2or O3 presence under solar radiation. The results showed free cyanide photocatalytic oxidation percentages between 64% and 72% using Nb2O5 3H2Oand 67% and 71% using T iO2 Degussa P-25. The catalysts were characterized structurally by XRD, BET, Raman and FTIR, with the purpose of correlating morphological changes in catalytic performing.
publishDate 2012
dc.date.issued.none.fl_str_mv 2012-12-01
dc.date.available.none.fl_str_mv 2019-11-22T18:49:15Z
dc.date.accessioned.none.fl_str_mv 2019-11-22T18:49:15Z
dc.date.none.fl_str_mv 2012-12-01
dc.type.eng.fl_str_mv article
info:eu-repo/semantics/article
publishedVersion
info:eu-repo/semantics/publishedVersion
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http://purl.org/coar/resource_type/c_2df8fbb1
dc.type.local.spa.fl_str_mv Artículo
status_str publishedVersion
dc.identifier.issn.none.fl_str_mv 2256-4314
1794-9165
dc.identifier.uri.none.fl_str_mv http://hdl.handle.net/10784/14456
dc.identifier.doi.none.fl_str_mv 10.17230/ingciencia.8.16.10
identifier_str_mv 2256-4314
1794-9165
10.17230/ingciencia.8.16.10
url http://hdl.handle.net/10784/14456
dc.language.iso.spa.fl_str_mv spa
language spa
dc.relation.isversionof.none.fl_str_mv http://publicaciones.eafit.edu.co/index.php/ingciencia/article/view/1714
dc.relation.uri.none.fl_str_mv http://publicaciones.eafit.edu.co/index.php/ingciencia/article/view/1714
dc.rights.eng.fl_str_mv Copyright (c) 2012 Aida Liliana Barbosa López, Isel María Castro Sierra
dc.rights.coar.fl_str_mv http://purl.org/coar/access_right/c_abf2
dc.rights.local.spa.fl_str_mv Acceso abierto
rights_invalid_str_mv Copyright (c) 2012 Aida Liliana Barbosa López, Isel María Castro Sierra
Acceso abierto
http://purl.org/coar/access_right/c_abf2
dc.format.none.fl_str_mv application/pdf
dc.coverage.spatial.eng.fl_str_mv Medellín de: Lat: 06 15 00 N degrees minutes Lat: 6.2500 decimal degrees Long: 075 36 00 W degrees minutes Long: -75.6000 decimal degrees
dc.publisher.spa.fl_str_mv Universidad EAFIT
dc.source.none.fl_str_mv instname:Universidad EAFIT
reponame:Repositorio Institucional Universidad EAFIT
dc.source.spa.fl_str_mv Ingeniería y Ciencia; Vol 8, No 16 (2012)
instname_str Universidad EAFIT
institution Universidad EAFIT
reponame_str Repositorio Institucional Universidad EAFIT
collection Repositorio Institucional Universidad EAFIT
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spelling Medellín de: Lat: 06 15 00 N degrees minutes Lat: 6.2500 decimal degrees Long: 075 36 00 W degrees minutes Long: -75.6000 decimal degrees2012-12-012019-11-22T18:49:15Z2012-12-012019-11-22T18:49:15Z2256-43141794-9165http://hdl.handle.net/10784/1445610.17230/ingciencia.8.16.10This article discusses the viability of using agents such as niobium photocatalyst in decreasing higher energy of the band gap. To do so competitively withT iO2, the presence of oxidation helpers such as H2O2 and O3 could present surprising results in the catalytic performance due to higher generation of OH o radicals. Oxidation helpers are shown to assist in obtaining larger are oxides and textural properties different from commercial niobium oxide, and enhancing its catalytic activity in free cyanide removing. The article presents experimental results of cyanide photodegradation of 100mg/l with Degussa P-25 T iO2 and Nb2O53H2O, using a type CPC photoreactor and sunlight as the radiation source. Taking an inclination equal to Cartagena latitude of 10,450, the results show a clear effect of pH, catalyst type and oxidation auxiliar agenton photodegradation reaction. The ion cyanide reduction of polluted effluent was enhanced by oxidizing agent (O3 and H2O2) addition. This may suggest a greater susceptibility to free cyanide oxidation and cianate indirect oxidation due to higher hydroxyl radical generation, which was induced by H2O2or O3 presence under solar radiation. The results showed free cyanide photocatalytic oxidation percentages between 64% and 72% using Nb2O5 3H2Oand 67% and 71% using T iO2 Degussa P-25. The catalysts were characterized structurally by XRD, BET, Raman and FTIR, with the purpose of correlating morphological changes in catalytic performing.Este artículo discute la viabilidad de usar agentes como el fotocatalizador de niobio para disminuir la energía más alta de la banda prohibida. Para hacerlo de manera competitiva con TiO2, la presencia de auxiliares de oxidación como H2O2 y O3 podría presentar resultados sorprendentes en el rendimiento catalítico debido a una mayor generación de radicales OH o. Se ha demostrado que los auxiliares de oxidación ayudan a obtener óxidos más grandes y propiedades de textura diferentes del óxido de niobio comercial, y mejoran su actividad catalítica en la eliminación de cianuro libre. El artículo presenta resultados experimentales de fotodegradación de cianuro de 100 mg / l con Degussa P-25 T iO2 y Nb2O53H2O, utilizando un fotorreactor tipo CPC y luz solar como fuente de radiación. Tomando una inclinación igual a la latitud de Cartagena de 10,450, los resultados muestran un efecto claro de pH, tipo de catalizador y agente auxiliar de oxidación en la reacción de fotodegradación. La reducción de cianuro iónico del agente contaminante se mejoró mediante la adición del agente oxidante (O3 y H2O2). Esto puede sugerir una mayor susceptibilidad a la oxidación de cianuro libre y a la oxidación indirecta de cianato debido a una mayor generación de radicales hidroxilo, que fue inducida por la presencia de H2O2 o O3 bajo radiación solar. Los resultados mostraron porcentajes de oxidación fotocatalítica de cianuro libre entre 64% y 72% usando Nb2O5 3H2O y 67% y 71% usando T iO2 Degussa P-25. Los catalizadores se caracterizaron estructuralmente por XRD, BET, Raman y FTIR, con el fin de correlacionar los cambios morfológicos en el rendimiento catalítico.application/pdfspaUniversidad EAFIThttp://publicaciones.eafit.edu.co/index.php/ingciencia/article/view/1714http://publicaciones.eafit.edu.co/index.php/ingciencia/article/view/1714Copyright (c) 2012 Aida Liliana Barbosa López, Isel María Castro SierraAcceso abiertohttp://purl.org/coar/access_right/c_abf2instname:Universidad EAFITreponame:Repositorio Institucional Universidad EAFITIngeniería y Ciencia; Vol 8, No 16 (2012)Comparative Study of Catalytic Systems T iO2 and N b2O5Estudio catalítico comparativo de los sistemas TiO2 y Nb2O5 en la degradación de cianuro en función del tipo de oxidantearticleinfo:eu-repo/semantics/articlepublishedVersioninfo:eu-repo/semantics/publishedVersionArtículohttp://purl.org/coar/version/c_970fb48d4fbd8a85http://purl.org/coar/resource_type/c_6501http://purl.org/coar/resource_type/c_2df8fbb1PhotocatalysisOzoneNiobium OxideTitanium OxideHydrogen PeroxideFotocatálisisOzonoÓxido De NiobioÓxido De TitanioPeróxido De HidrógenoBarbosa López, Aida LilianaCastro Sierra, Isel MaríaUniversidad de CartagenaIngeniería y Ciencia816257280ing.cienc.THUMBNAILminaitura-ig_Mesa de trabajo 1.jpgminaitura-ig_Mesa de trabajo 1.jpgimage/jpeg265796https://repository.eafit.edu.co/bitstreams/95318ad6-e0ac-4709-9a8c-092e08ddfda3/downloadda9b21a5c7e00c7f1127cef8e97035e0MD51ORIGINAL10.pdf10.pdfTexto completo PDFapplication/pdf947753https://repository.eafit.edu.co/bitstreams/3e986a74-5d69-4343-a576-82baf02d8e06/download1a34d67f29252411893e71d3bd94a0b8MD52articulo.htmlarticulo.htmlTexto completo HTMLtext/html374https://repository.eafit.edu.co/bitstreams/9dfc7985-96ee-4f76-92f4-1640e82e93f5/download0545d9947a419e84a4a8457978f6d125MD5310784/14456oai:repository.eafit.edu.co:10784/144562020-03-02 21:55:56.161open.accesshttps://repository.eafit.edu.coRepositorio Institucional Universidad EAFITrepositorio@eafit.edu.co