Photocatalytic water splitting with noble-metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/235076 |
Resumo: | Here, the authors (i) discuss the most prominent co-catalyst for H2 generation struc tured in the form of Me-TiO2/MCM-41 (Me: Ag, Co, Cu, Ni) based on structural, electronic, textural, morphological and optical characterization techniques, such as XRD, wide and small angle, XPS, Fourier-transform infrared spectroscopy, scanning electron microscopy, B.E.T., textural analysis, photoacoustic spectroscopy and photo luminescence spectroscopy; and (ii) evaluate the difference in hydrogen production in two distinct geometric reactors based on a theoretical study of light distribution inside the reactors supported by the experimental quantum yield calculation. As a result, copper-doped photocatalyst generated higher hydrogen amount compared to the others. The high photocatalyst performance was due to the greater lamp spec trum absorption, marked by the low bandgap value, and high photoactivity justified by the low rate of electronic recombination. The hydrogen generation in the quartz reactor was seven times higher than the annular one, and when at maximum light power, it is comparable to the most sophisticated reaction systems found in litera ture. The larger light exposure area per unit volume of the quartz reactor compared to the annular one is the reason why it obtained better results due to the lower emit ted photon blockade, with a 1.81% apparent quantum yield. |
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Vicentini, Jean César MarinoziCardoso, Rafael Manieri PiresSubtil, Gimerson WeigertTavares, Fernanda de OliveiraOliveira, Daiane Marques deYassue-Cordeiro, Patricia HissaeEnzweiler, HevelineGimenes, Marcelino LuizAlves, Maria do Carmo MartinsMorais, JonderScaliante, Mara Heloisa Neves OlsenSouza, Marcos de2022-02-12T04:51:15Z20201944-7450http://hdl.handle.net/10183/235076001127798Here, the authors (i) discuss the most prominent co-catalyst for H2 generation struc tured in the form of Me-TiO2/MCM-41 (Me: Ag, Co, Cu, Ni) based on structural, electronic, textural, morphological and optical characterization techniques, such as XRD, wide and small angle, XPS, Fourier-transform infrared spectroscopy, scanning electron microscopy, B.E.T., textural analysis, photoacoustic spectroscopy and photo luminescence spectroscopy; and (ii) evaluate the difference in hydrogen production in two distinct geometric reactors based on a theoretical study of light distribution inside the reactors supported by the experimental quantum yield calculation. As a result, copper-doped photocatalyst generated higher hydrogen amount compared to the others. The high photocatalyst performance was due to the greater lamp spec trum absorption, marked by the low bandgap value, and high photoactivity justified by the low rate of electronic recombination. The hydrogen generation in the quartz reactor was seven times higher than the annular one, and when at maximum light power, it is comparable to the most sophisticated reaction systems found in litera ture. The larger light exposure area per unit volume of the quartz reactor compared to the annular one is the reason why it obtained better results due to the lower emit ted photon blockade, with a 1.81% apparent quantum yield.application/pdfengEnvironmental Progress & Sustainable Energy. New York. Vol. 40, no. 3 (May/June 2021), e13557, 11 p.Produção de hidrogênioFotocatáliseMetais de transiçãoHydrogen productionPhotocatalysisPhotocatalytic water splitting with noble-metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designsEstrangeiroinfo: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:UFRGSTEXT001127798.pdf.txt001127798.pdf.txtExtracted Texttext/plain52111http://www.lume.ufrgs.br/bitstream/10183/235076/2/001127798.pdf.txt09fbd1307182bfeecfbee9630722f473MD52ORIGINAL001127798.pdfTexto completoapplication/pdf2421090http://www.lume.ufrgs.br/bitstream/10183/235076/1/001127798.pdf44374497f1f9a1e74e7fcd31da504eabMD5110183/2350762023-07-19 03:38:30.464598oai:www.lume.ufrgs.br:10183/235076Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-19T06:38:30Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Photocatalytic water splitting with noble-metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs |
title |
Photocatalytic water splitting with noble-metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs |
spellingShingle |
Photocatalytic water splitting with noble-metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs Vicentini, Jean César Marinozi Produção de hidrogênio Fotocatálise Metais de transição Hydrogen production Photocatalysis |
title_short |
Photocatalytic water splitting with noble-metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs |
title_full |
Photocatalytic water splitting with noble-metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs |
title_fullStr |
Photocatalytic water splitting with noble-metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs |
title_full_unstemmed |
Photocatalytic water splitting with noble-metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs |
title_sort |
Photocatalytic water splitting with noble-metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs |
author |
Vicentini, Jean César Marinozi |
author_facet |
Vicentini, Jean César Marinozi Cardoso, Rafael Manieri Pires Subtil, Gimerson Weigert Tavares, Fernanda de Oliveira Oliveira, Daiane Marques de Yassue-Cordeiro, Patricia Hissae Enzweiler, Heveline Gimenes, Marcelino Luiz Alves, Maria do Carmo Martins Morais, Jonder Scaliante, Mara Heloisa Neves Olsen Souza, Marcos de |
author_role |
author |
author2 |
Cardoso, Rafael Manieri Pires Subtil, Gimerson Weigert Tavares, Fernanda de Oliveira Oliveira, Daiane Marques de Yassue-Cordeiro, Patricia Hissae Enzweiler, Heveline Gimenes, Marcelino Luiz Alves, Maria do Carmo Martins Morais, Jonder Scaliante, Mara Heloisa Neves Olsen Souza, Marcos de |
author2_role |
author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Vicentini, Jean César Marinozi Cardoso, Rafael Manieri Pires Subtil, Gimerson Weigert Tavares, Fernanda de Oliveira Oliveira, Daiane Marques de Yassue-Cordeiro, Patricia Hissae Enzweiler, Heveline Gimenes, Marcelino Luiz Alves, Maria do Carmo Martins Morais, Jonder Scaliante, Mara Heloisa Neves Olsen Souza, Marcos de |
dc.subject.por.fl_str_mv |
Produção de hidrogênio Fotocatálise Metais de transição |
topic |
Produção de hidrogênio Fotocatálise Metais de transição Hydrogen production Photocatalysis |
dc.subject.eng.fl_str_mv |
Hydrogen production Photocatalysis |
description |
Here, the authors (i) discuss the most prominent co-catalyst for H2 generation struc tured in the form of Me-TiO2/MCM-41 (Me: Ag, Co, Cu, Ni) based on structural, electronic, textural, morphological and optical characterization techniques, such as XRD, wide and small angle, XPS, Fourier-transform infrared spectroscopy, scanning electron microscopy, B.E.T., textural analysis, photoacoustic spectroscopy and photo luminescence spectroscopy; and (ii) evaluate the difference in hydrogen production in two distinct geometric reactors based on a theoretical study of light distribution inside the reactors supported by the experimental quantum yield calculation. As a result, copper-doped photocatalyst generated higher hydrogen amount compared to the others. The high photocatalyst performance was due to the greater lamp spec trum absorption, marked by the low bandgap value, and high photoactivity justified by the low rate of electronic recombination. The hydrogen generation in the quartz reactor was seven times higher than the annular one, and when at maximum light power, it is comparable to the most sophisticated reaction systems found in litera ture. The larger light exposure area per unit volume of the quartz reactor compared to the annular one is the reason why it obtained better results due to the lower emit ted photon blockade, with a 1.81% apparent quantum yield. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020 |
dc.date.accessioned.fl_str_mv |
2022-02-12T04:51:15Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/235076 |
dc.identifier.issn.pt_BR.fl_str_mv |
1944-7450 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001127798 |
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1944-7450 001127798 |
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http://hdl.handle.net/10183/235076 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Environmental Progress & Sustainable Energy. New York. Vol. 40, no. 3 (May/June 2021), e13557, 11 p. |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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