Ag/polydopamine-modified Ti/TiO2 nanotube arrays: A platform for enhanced CO2 photoelectroreduction to methanol
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 UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jcou.2019.08.006 http://hdl.handle.net/11449/190613 |
Resumo: | TiO2 nanotube (NT) arrays were modified with thin films of polydopamine (PDA) and Ag nanoparticles (NP) and were used as electron storage centers on a photoelectrode surface, in order to drive the reduction of CO2 to methanol. Silver nanoparticles were obtained by means of chemical deposition using the catechol groups present in PDA. The Ti/TiO2NT@PDA-AgNP photocathode presented higher photocurrents when irradiated using either UV-vis irradiation or a solar simulator, compared to bare Ti/TiO2NT, indicating improvement of charge carrier separation, while the band gap of the material decreased from 3.12 to 2.3 eV. Under optimized conditions, methanol production of 59.5 μM cm-2 was achieved and under the solar simulator, 19.25 μM cm-2 of methanol was generated, indicating that the PDA-AgNP coating improved the activation by visible light. The Ag present in the modified Ti/TiO2NT electrodes was quantified during photoelectrocatalysis, with the amount of Ag nanoparticles released from the electrodes being negligible. A schematic representation of the charge transfer mechanism at the Ti/TiO2NT@PDA-AgNP electrode is provided. |
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Repositório Institucional da UNESP |
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Ag/polydopamine-modified Ti/TiO2 nanotube arrays: A platform for enhanced CO2 photoelectroreduction to methanolCO2 reductionDopaminePhotoelectrocatalysisSilverSolar simulatorTiO2 nanotube (NT) arrays were modified with thin films of polydopamine (PDA) and Ag nanoparticles (NP) and were used as electron storage centers on a photoelectrode surface, in order to drive the reduction of CO2 to methanol. Silver nanoparticles were obtained by means of chemical deposition using the catechol groups present in PDA. The Ti/TiO2NT@PDA-AgNP photocathode presented higher photocurrents when irradiated using either UV-vis irradiation or a solar simulator, compared to bare Ti/TiO2NT, indicating improvement of charge carrier separation, while the band gap of the material decreased from 3.12 to 2.3 eV. Under optimized conditions, methanol production of 59.5 μM cm-2 was achieved and under the solar simulator, 19.25 μM cm-2 of methanol was generated, indicating that the PDA-AgNP coating improved the activation by visible light. The Ag present in the modified Ti/TiO2NT electrodes was quantified during photoelectrocatalysis, with the amount of Ag nanoparticles released from the electrodes being negligible. A schematic representation of the charge transfer mechanism at the Ti/TiO2NT@PDA-AgNP electrode is provided.São Paulo State University (UNESP) Institute of ChemistryNational Institute of Alternative Technologies for Detection Toxicological Evaluation and Removal of Micropollutants and Radioactive Substances (INCT-DATREM) São Paulo State University (UNESP)São Paulo State University (UNESP) Institute of ChemistryNational Institute of Alternative Technologies for Detection Toxicological Evaluation and Removal of Micropollutants and Radioactive Substances (INCT-DATREM) São Paulo State University (UNESP)Universidade Estadual Paulista (Unesp)Perini, João Angelo Lima [UNESP]Torquato, Lilian D. Moura [UNESP]Irikura, Kallyni [UNESP]Zanoni, Maria Valnice Boldrin [UNESP]2019-10-06T17:19:04Z2019-10-06T17:19:04Z2019-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article596-605http://dx.doi.org/10.1016/j.jcou.2019.08.006Journal of CO2 Utilization, v. 34, p. 596-605.2212-9820http://hdl.handle.net/11449/19061310.1016/j.jcou.2019.08.0062-s2.0-85071427009Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of CO2 Utilizationinfo:eu-repo/semantics/openAccess2021-10-23T20:19:32Zoai:repositorio.unesp.br:11449/190613Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:05:45.418963Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Ag/polydopamine-modified Ti/TiO2 nanotube arrays: A platform for enhanced CO2 photoelectroreduction to methanol |
title |
Ag/polydopamine-modified Ti/TiO2 nanotube arrays: A platform for enhanced CO2 photoelectroreduction to methanol |
spellingShingle |
Ag/polydopamine-modified Ti/TiO2 nanotube arrays: A platform for enhanced CO2 photoelectroreduction to methanol Perini, João Angelo Lima [UNESP] CO2 reduction Dopamine Photoelectrocatalysis Silver Solar simulator |
title_short |
Ag/polydopamine-modified Ti/TiO2 nanotube arrays: A platform for enhanced CO2 photoelectroreduction to methanol |
title_full |
Ag/polydopamine-modified Ti/TiO2 nanotube arrays: A platform for enhanced CO2 photoelectroreduction to methanol |
title_fullStr |
Ag/polydopamine-modified Ti/TiO2 nanotube arrays: A platform for enhanced CO2 photoelectroreduction to methanol |
title_full_unstemmed |
Ag/polydopamine-modified Ti/TiO2 nanotube arrays: A platform for enhanced CO2 photoelectroreduction to methanol |
title_sort |
Ag/polydopamine-modified Ti/TiO2 nanotube arrays: A platform for enhanced CO2 photoelectroreduction to methanol |
author |
Perini, João Angelo Lima [UNESP] |
author_facet |
Perini, João Angelo Lima [UNESP] Torquato, Lilian D. Moura [UNESP] Irikura, Kallyni [UNESP] Zanoni, Maria Valnice Boldrin [UNESP] |
author_role |
author |
author2 |
Torquato, Lilian D. Moura [UNESP] Irikura, Kallyni [UNESP] Zanoni, Maria Valnice Boldrin [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Perini, João Angelo Lima [UNESP] Torquato, Lilian D. Moura [UNESP] Irikura, Kallyni [UNESP] Zanoni, Maria Valnice Boldrin [UNESP] |
dc.subject.por.fl_str_mv |
CO2 reduction Dopamine Photoelectrocatalysis Silver Solar simulator |
topic |
CO2 reduction Dopamine Photoelectrocatalysis Silver Solar simulator |
description |
TiO2 nanotube (NT) arrays were modified with thin films of polydopamine (PDA) and Ag nanoparticles (NP) and were used as electron storage centers on a photoelectrode surface, in order to drive the reduction of CO2 to methanol. Silver nanoparticles were obtained by means of chemical deposition using the catechol groups present in PDA. The Ti/TiO2NT@PDA-AgNP photocathode presented higher photocurrents when irradiated using either UV-vis irradiation or a solar simulator, compared to bare Ti/TiO2NT, indicating improvement of charge carrier separation, while the band gap of the material decreased from 3.12 to 2.3 eV. Under optimized conditions, methanol production of 59.5 μM cm-2 was achieved and under the solar simulator, 19.25 μM cm-2 of methanol was generated, indicating that the PDA-AgNP coating improved the activation by visible light. The Ag present in the modified Ti/TiO2NT electrodes was quantified during photoelectrocatalysis, with the amount of Ag nanoparticles released from the electrodes being negligible. A schematic representation of the charge transfer mechanism at the Ti/TiO2NT@PDA-AgNP electrode is provided. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-06T17:19:04Z 2019-10-06T17:19:04Z 2019-12-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.jcou.2019.08.006 Journal of CO2 Utilization, v. 34, p. 596-605. 2212-9820 http://hdl.handle.net/11449/190613 10.1016/j.jcou.2019.08.006 2-s2.0-85071427009 |
url |
http://dx.doi.org/10.1016/j.jcou.2019.08.006 http://hdl.handle.net/11449/190613 |
identifier_str_mv |
Journal of CO2 Utilization, v. 34, p. 596-605. 2212-9820 10.1016/j.jcou.2019.08.006 2-s2.0-85071427009 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of CO2 Utilization |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
596-605 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128755439239168 |