New insights in the performance and reuse of rGO/TiO2 composites for the photocatalytic hydrogen production

The viability of the photocatalytic hydrogen production is closely related to the performance and long term stability of the photocatalyst. In this work rGO/TiO2 composites have been synthetized with graphene oxide (GO) ratios from 1% to 10% and experimentally assessed towards hydrogen generation fr...

ver descrição completa

Detalhes bibliográficos
Autores: Corredor Ortega, Juan, Rivero Martínez, María José|||0000-0002-0291-9200, Ortiz Uribe, Inmaculada|||0000-0002-3257-4821
Tipo de documento: artigo
Data de publicação:2021
País:España
Recursos:Universidad de Cantabria (UC)
Repositório:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglês
OAI Identifier:oai:repositorio.unican.es:10902/21565
Acesso em linha:http://hdl.handle.net/10902/21565
Access Level:Acceso aberto
Palavra-chave:rGO/TiO2
Hydrogen production
Photocatalysis
Photocatalyst stability
id ES_f26d2bb578b4b3048cb014aa8e46bb62
oai_identifier_str oai:repositorio.unican.es:10902/21565
network_acronym_str ES
network_name_str España
repository_id_str
spelling New insights in the performance and reuse of rGO/TiO2 composites for the photocatalytic hydrogen productionCorredor Ortega, JuanRivero Martínez, María José|||0000-0002-0291-9200Ortiz Uribe, Inmaculada|||0000-0002-3257-4821rGO/TiO2Hydrogen productionPhotocatalysisPhotocatalyst stabilityThe viability of the photocatalytic hydrogen production is closely related to the performance and long term stability of the photocatalyst. In this work rGO/TiO2 composites have been synthetized with graphene oxide (GO) ratios from 1% to 10% and experimentally assessed towards hydrogen generation from methanol solutions. The performance of the composite with 2% of rGO (2 GT) has been compared to bare TiO2 working with 20% volume methanol solution. The hydrogen production initial rate showed similar values with both photocatalysts decreasing after about 24 h. Further analysis of the photocatalytic process at longer times showed the negative influence of hydrogen accumulation in the reaction system. Thus, an experimental procedure with argon purge was developed and the behavior of TiO2 and 2 GT photocatalysts was compared. It is concluded that TiO2 keeps its activity after 8 operation cycles while 2 GT performance reduces progressively. This can be attributed to the further reduction of GO and the increase of defects in its structure.Financial support from projects CTM2015-69845-R (MINECO/FEDER, UE) and RTI2018-099407-B-I00 (MCIU/AEI/FEDER, UE) is gratefully acknowledged. Juan Corredor is grateful to a FPI contract grant (BES-2016-079201).Elsevier LtdUniversidad de Cantabria20212021-05-13journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttp://hdl.handle.net/10902/21565International Journal of Hydrogen Energy, 2021, 46(33), 17500-17506. 3rd ANQUE-ICCE International Congress of Chemical Engineering: Workshop Renewable Hydrogen Energy World, Santander, 2019reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/215652026-06-02T12:39:31Z
dc.title.none.fl_str_mv New insights in the performance and reuse of rGO/TiO2 composites for the photocatalytic hydrogen production
title New insights in the performance and reuse of rGO/TiO2 composites for the photocatalytic hydrogen production
spellingShingle New insights in the performance and reuse of rGO/TiO2 composites for the photocatalytic hydrogen production
Corredor Ortega, Juan
rGO/TiO2
Hydrogen production
Photocatalysis
Photocatalyst stability
title_short New insights in the performance and reuse of rGO/TiO2 composites for the photocatalytic hydrogen production
title_full New insights in the performance and reuse of rGO/TiO2 composites for the photocatalytic hydrogen production
title_fullStr New insights in the performance and reuse of rGO/TiO2 composites for the photocatalytic hydrogen production
title_full_unstemmed New insights in the performance and reuse of rGO/TiO2 composites for the photocatalytic hydrogen production
title_sort New insights in the performance and reuse of rGO/TiO2 composites for the photocatalytic hydrogen production
dc.creator.none.fl_str_mv Corredor Ortega, Juan
Rivero Martínez, María José|||0000-0002-0291-9200
Ortiz Uribe, Inmaculada|||0000-0002-3257-4821
author Corredor Ortega, Juan
author_facet Corredor Ortega, Juan
Rivero Martínez, María José|||0000-0002-0291-9200
Ortiz Uribe, Inmaculada|||0000-0002-3257-4821
author_role author
author2 Rivero Martínez, María José|||0000-0002-0291-9200
Ortiz Uribe, Inmaculada|||0000-0002-3257-4821
author2_role author
author
dc.contributor.none.fl_str_mv Universidad de Cantabria
dc.subject.none.fl_str_mv rGO/TiO2
Hydrogen production
Photocatalysis
Photocatalyst stability
topic rGO/TiO2
Hydrogen production
Photocatalysis
Photocatalyst stability
description The viability of the photocatalytic hydrogen production is closely related to the performance and long term stability of the photocatalyst. In this work rGO/TiO2 composites have been synthetized with graphene oxide (GO) ratios from 1% to 10% and experimentally assessed towards hydrogen generation from methanol solutions. The performance of the composite with 2% of rGO (2 GT) has been compared to bare TiO2 working with 20% volume methanol solution. The hydrogen production initial rate showed similar values with both photocatalysts decreasing after about 24 h. Further analysis of the photocatalytic process at longer times showed the negative influence of hydrogen accumulation in the reaction system. Thus, an experimental procedure with argon purge was developed and the behavior of TiO2 and 2 GT photocatalysts was compared. It is concluded that TiO2 keeps its activity after 8 operation cycles while 2 GT performance reduces progressively. This can be attributed to the further reduction of GO and the increase of defects in its structure.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-05-13
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10902/21565
url http://hdl.handle.net/10902/21565
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier Ltd
publisher.none.fl_str_mv Elsevier Ltd
dc.source.none.fl_str_mv International Journal of Hydrogen Energy, 2021, 46(33), 17500-17506. 3rd ANQUE-ICCE International Congress of Chemical Engineering: Workshop Renewable Hydrogen Energy World, Santander, 2019
reponame:UCrea Repositorio Abierto de la Universidad de Cantabria
instname:Universidad de Cantabria (UC)
instname_str Universidad de Cantabria (UC)
reponame_str UCrea Repositorio Abierto de la Universidad de Cantabria
collection UCrea Repositorio Abierto de la Universidad de Cantabria
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869424279130472448
score 15,300724

Registros relacionados