Synthesis of Bi2FexNbO7 films applied as a catalyst for hydrogen production using visible-light photo-electrolysis
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/204376 |
Resumo: | The seek for feasible sustainable mobility alternatives is a major concern of the society nowadays. By its turn, the production of hydrogen represents one of the main lines of study on clean energy, since hydrogen presents the possibility of storage and association with other renewable energy sources. In this regard, photo-electrolysis is a promising option for hydrogen generation. This process optimizes the electrolysis of water by using external energy to increase the potential of a photo-electrode, which must be a material that absorbs sunlight (usually a semiconductor activated by solar radiation), promoting the generation of H2 at the cathode. Titanium dioxide (TiO2) is the most applied semiconductor in photocatalytic applications. However, the band gap of this material limits its activity only under UV light, disregarding about 90% of incident solar radiation. Researchers explore catalysts that can be activated under visible light, such as bismuth-based mixed oxide semiconductors, which have attracted interest because of their excellent stability, visible light absorption, and photocatalytic properties. This research aims to develop and characterize photo-anodes based on bismuth, niobium and iron oxides (Bi2FexNbO7), for production of hydrogen via photo-electrolysis of water. The films were produced by the sol-gel process and deposited under a conductive glass slide by dip-coating. The effect of the iron concentration was evaluated by UV-Vis spectroscopy and SEM analysis, in order to estimate its hydrogen production potential. |
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Scharnberg, Allan Ramone de AraujoPavlovic, AnaAlves, Annelise Kopp2020-01-16T04:10:22Z20191757-899Xhttp://hdl.handle.net/10183/204376001106895The seek for feasible sustainable mobility alternatives is a major concern of the society nowadays. By its turn, the production of hydrogen represents one of the main lines of study on clean energy, since hydrogen presents the possibility of storage and association with other renewable energy sources. In this regard, photo-electrolysis is a promising option for hydrogen generation. This process optimizes the electrolysis of water by using external energy to increase the potential of a photo-electrode, which must be a material that absorbs sunlight (usually a semiconductor activated by solar radiation), promoting the generation of H2 at the cathode. Titanium dioxide (TiO2) is the most applied semiconductor in photocatalytic applications. However, the band gap of this material limits its activity only under UV light, disregarding about 90% of incident solar radiation. Researchers explore catalysts that can be activated under visible light, such as bismuth-based mixed oxide semiconductors, which have attracted interest because of their excellent stability, visible light absorption, and photocatalytic properties. This research aims to develop and characterize photo-anodes based on bismuth, niobium and iron oxides (Bi2FexNbO7), for production of hydrogen via photo-electrolysis of water. The films were produced by the sol-gel process and deposited under a conductive glass slide by dip-coating. The effect of the iron concentration was evaluated by UV-Vis spectroscopy and SEM analysis, in order to estimate its hydrogen production potential.application/pdfengIOP Conference series : materials science and engineering. [Bristol, UK]. Vol. 659 (2019),012081, 9 p.Energia limpaProdução de hidrogênioSol-gelSynthesis of Bi2FexNbO7 films applied as a catalyst for hydrogen production using visible-light photo-electrolysisEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001106895.pdf.txt001106895.pdf.txtExtracted Texttext/plain24755http://www.lume.ufrgs.br/bitstream/10183/204376/2/001106895.pdf.txt6e0788d942e331da0a3bbd68631f82a4MD52ORIGINAL001106895.pdfTexto completo (inglês)application/pdf703700http://www.lume.ufrgs.br/bitstream/10183/204376/1/001106895.pdfa4b2e811beee32e694c78933ec778960MD5110183/2043762020-01-17 05:10:49.333119oai:www.lume.ufrgs.br:10183/204376Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2020-01-17T07:10:49Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Synthesis of Bi2FexNbO7 films applied as a catalyst for hydrogen production using visible-light photo-electrolysis |
title |
Synthesis of Bi2FexNbO7 films applied as a catalyst for hydrogen production using visible-light photo-electrolysis |
spellingShingle |
Synthesis of Bi2FexNbO7 films applied as a catalyst for hydrogen production using visible-light photo-electrolysis Scharnberg, Allan Ramone de Araujo Energia limpa Produção de hidrogênio Sol-gel |
title_short |
Synthesis of Bi2FexNbO7 films applied as a catalyst for hydrogen production using visible-light photo-electrolysis |
title_full |
Synthesis of Bi2FexNbO7 films applied as a catalyst for hydrogen production using visible-light photo-electrolysis |
title_fullStr |
Synthesis of Bi2FexNbO7 films applied as a catalyst for hydrogen production using visible-light photo-electrolysis |
title_full_unstemmed |
Synthesis of Bi2FexNbO7 films applied as a catalyst for hydrogen production using visible-light photo-electrolysis |
title_sort |
Synthesis of Bi2FexNbO7 films applied as a catalyst for hydrogen production using visible-light photo-electrolysis |
author |
Scharnberg, Allan Ramone de Araujo |
author_facet |
Scharnberg, Allan Ramone de Araujo Pavlovic, Ana Alves, Annelise Kopp |
author_role |
author |
author2 |
Pavlovic, Ana Alves, Annelise Kopp |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Scharnberg, Allan Ramone de Araujo Pavlovic, Ana Alves, Annelise Kopp |
dc.subject.por.fl_str_mv |
Energia limpa Produção de hidrogênio Sol-gel |
topic |
Energia limpa Produção de hidrogênio Sol-gel |
description |
The seek for feasible sustainable mobility alternatives is a major concern of the society nowadays. By its turn, the production of hydrogen represents one of the main lines of study on clean energy, since hydrogen presents the possibility of storage and association with other renewable energy sources. In this regard, photo-electrolysis is a promising option for hydrogen generation. This process optimizes the electrolysis of water by using external energy to increase the potential of a photo-electrode, which must be a material that absorbs sunlight (usually a semiconductor activated by solar radiation), promoting the generation of H2 at the cathode. Titanium dioxide (TiO2) is the most applied semiconductor in photocatalytic applications. However, the band gap of this material limits its activity only under UV light, disregarding about 90% of incident solar radiation. Researchers explore catalysts that can be activated under visible light, such as bismuth-based mixed oxide semiconductors, which have attracted interest because of their excellent stability, visible light absorption, and photocatalytic properties. This research aims to develop and characterize photo-anodes based on bismuth, niobium and iron oxides (Bi2FexNbO7), for production of hydrogen via photo-electrolysis of water. The films were produced by the sol-gel process and deposited under a conductive glass slide by dip-coating. The effect of the iron concentration was evaluated by UV-Vis spectroscopy and SEM analysis, in order to estimate its hydrogen production potential. |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019 |
dc.date.accessioned.fl_str_mv |
2020-01-16T04:10:22Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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http://hdl.handle.net/10183/204376 |
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1757-899X |
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001106895 |
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http://hdl.handle.net/10183/204376 |
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eng |
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eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
IOP Conference series : materials science and engineering. [Bristol, UK]. Vol. 659 (2019),012081, 9 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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