Microwave Synthesis of Visible-Light-Activated g-C3N4/TiO2 Photocatalysts

Detalhes bibliográficos
Autor(a) principal: Matias, Maria Leonor
Data de Publicação: 2023
Outros Autores: Reis-Machado, Ana S., Rodrigues, Joana, Calmeiro, Tomás, Deuermeier, Jonas, Pimentel, Ana, Fortunato, Elvira, Martins, Rodrigo, Nunes, Daniela
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/154614
Resumo: Funding Information: Acknowledgments are also given to the EC project SYNERGY H2020-WIDESPREAD-2020-5, CSA, proposal nº 952169, EMERGE-2020-INFRAIA-2020-1, proposal nº 101008701. Publisher Copyright: © 2023 by the authors.
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spelling Microwave Synthesis of Visible-Light-Activated g-C3N4/TiO2 Photocatalystsg-CN/TiOheterostructuresmicrowave synthesisphotocatalysispollutant degradationChemical Engineering(all)Materials Science(all)Funding Information: Acknowledgments are also given to the EC project SYNERGY H2020-WIDESPREAD-2020-5, CSA, proposal nº 952169, EMERGE-2020-INFRAIA-2020-1, proposal nº 101008701. Publisher Copyright: © 2023 by the authors.The preparation of visible-light-driven photocatalysts has become highly appealing for environmental remediation through simple, fast and green chemical methods. The current study reports the synthesis and characterization of graphitic carbon nitride/titanium dioxide (g-C3N4/TiO2) heterostructures through a fast (1 h) and simple microwave-assisted approach. Different g-C3N4 amounts mixed with TiO2 (15, 30 and 45 wt. %) were investigated for the photocatalytic degradation of a recalcitrant azo dye (methyl orange (MO)) under solar simulating light. X-ray diffraction (XRD) revealed the anatase TiO2 phase for the pure material and all heterostructures produced. Scanning electron microscopy (SEM) showed that by increasing the amount of g-C3N4 in the synthesis, large TiO2 aggregates composed of irregularly shaped particles were disintegrated and resulted in smaller ones, composing a film that covered the g-C3N4 nanosheets. Scanning transmission electron microscopy (STEM) analyses confirmed the existence of an effective interface between a g-C3N4 nanosheet and a TiO2 nanocrystal. X-ray photoelectron spectroscopy (XPS) evidenced no chemical alterations to both g-C3N4 and TiO2 at the heterostructure. The visible-light absorption shift was indicated by the red shift in the absorption onset through the ultraviolet-visible (UV-VIS) absorption spectra. The 30 wt. % of g-C3N4/TiO2 heterostructure showed the best photocatalytic performance, with a MO dye degradation of 85% in 4 h, corresponding to an enhanced efficiency of almost 2 and 10 times greater than that of pure TiO2 and g-C3N4 nanosheets, respectively. Superoxide radical species were found to be the most active radical species in the MO photodegradation process. The creation of a type-II heterostructure is highly suggested due to the negligible participation of hydroxyl radical species in the photodegradation process. The superior photocatalytic activity was attributed to the synergy of g-C3N4 and TiO2 materials.UNINOVA-Instituto de Desenvolvimento de Novas TecnologiasCENIMAT-i3N - Centro de Investigação de Materiais (Lab. Associado I3N)DCM - Departamento de Ciência dos MateriaisLAQV@REQUIMTEDQ - Departamento de QuímicaRUNMatias, Maria LeonorReis-Machado, Ana S.Rodrigues, JoanaCalmeiro, TomásDeuermeier, JonasPimentel, AnaFortunato, ElviraMartins, RodrigoNunes, Daniela2023-06-29T22:16:19Z2023-03-172023-03-17T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article26application/pdfhttp://hdl.handle.net/10362/154614eng2079-4991PURE: 64819621https://doi.org/10.3390/nano13061090info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T05:37:05Zoai:run.unl.pt:10362/154614Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:55:41.733752Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Microwave Synthesis of Visible-Light-Activated g-C3N4/TiO2 Photocatalysts
title Microwave Synthesis of Visible-Light-Activated g-C3N4/TiO2 Photocatalysts
spellingShingle Microwave Synthesis of Visible-Light-Activated g-C3N4/TiO2 Photocatalysts
Matias, Maria Leonor
g-CN/TiO
heterostructures
microwave synthesis
photocatalysis
pollutant degradation
Chemical Engineering(all)
Materials Science(all)
title_short Microwave Synthesis of Visible-Light-Activated g-C3N4/TiO2 Photocatalysts
title_full Microwave Synthesis of Visible-Light-Activated g-C3N4/TiO2 Photocatalysts
title_fullStr Microwave Synthesis of Visible-Light-Activated g-C3N4/TiO2 Photocatalysts
title_full_unstemmed Microwave Synthesis of Visible-Light-Activated g-C3N4/TiO2 Photocatalysts
title_sort Microwave Synthesis of Visible-Light-Activated g-C3N4/TiO2 Photocatalysts
author Matias, Maria Leonor
author_facet Matias, Maria Leonor
Reis-Machado, Ana S.
Rodrigues, Joana
Calmeiro, Tomás
Deuermeier, Jonas
Pimentel, Ana
Fortunato, Elvira
Martins, Rodrigo
Nunes, Daniela
author_role author
author2 Reis-Machado, Ana S.
Rodrigues, Joana
Calmeiro, Tomás
Deuermeier, Jonas
Pimentel, Ana
Fortunato, Elvira
Martins, Rodrigo
Nunes, Daniela
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv UNINOVA-Instituto de Desenvolvimento de Novas Tecnologias
CENIMAT-i3N - Centro de Investigação de Materiais (Lab. Associado I3N)
DCM - Departamento de Ciência dos Materiais
LAQV@REQUIMTE
DQ - Departamento de Química
RUN
dc.contributor.author.fl_str_mv Matias, Maria Leonor
Reis-Machado, Ana S.
Rodrigues, Joana
Calmeiro, Tomás
Deuermeier, Jonas
Pimentel, Ana
Fortunato, Elvira
Martins, Rodrigo
Nunes, Daniela
dc.subject.por.fl_str_mv g-CN/TiO
heterostructures
microwave synthesis
photocatalysis
pollutant degradation
Chemical Engineering(all)
Materials Science(all)
topic g-CN/TiO
heterostructures
microwave synthesis
photocatalysis
pollutant degradation
Chemical Engineering(all)
Materials Science(all)
description Funding Information: Acknowledgments are also given to the EC project SYNERGY H2020-WIDESPREAD-2020-5, CSA, proposal nº 952169, EMERGE-2020-INFRAIA-2020-1, proposal nº 101008701. Publisher Copyright: © 2023 by the authors.
publishDate 2023
dc.date.none.fl_str_mv 2023-06-29T22:16:19Z
2023-03-17
2023-03-17T00:00:00Z
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://hdl.handle.net/10362/154614
url http://hdl.handle.net/10362/154614
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 2079-4991
PURE: 64819621
https://doi.org/10.3390/nano13061090
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 26
application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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