The electronic origin of the zeta potential is supported by the redox mechanism on an aqueous dispersion of exfoliated graphite

Detalhes bibliográficos
Autor(a) principal: Damasceno, João Paulo Vita, 1990-
Data de Publicação: 2022
Outros Autores: Kubota, Lauro Tatsuo, 1964-
Tipo de documento: Artigo
Título da fonte: Repositório da Produção Científica e Intelectual da Unicamp
Texto Completo: https://hdl.handle.net/20.500.12733/7906
Resumo: Agradecimentos: JPVD acknowledges FAPESP for the post-doc fellowship (Process: 2020/06604-9). In addition, the authors acknowledge The São Paulo Research Foundation (FAPESP: 2014/50867-3 and 2013/22127-2), National Institute of Science & Technology in Bioanalytics (INCTBio, INCT-MCTI/CNPq/CAPES/FAPs n° 16/2014), National Council for Scientific and Technological Development (CNPq) (Projects: 434303/2016-0 and MCTIC/CNPq/FNDCT/MS/SCTIE/Decit n° 07/2020), and Coordination for the Improvement of Higher Education Personnel (CAPES). Finally, the authors thank the Brazilian Nanotechnology National Laboratory (LNNano) for the XPS and AFM analyses
id CAMP_9290a68f5c6e386e67a19caab2fc71d5
oai_identifier_str oai:https://www.repositorio.unicamp.br/:1261526
network_acronym_str CAMP
network_name_str Repositório da Produção Científica e Intelectual da Unicamp
repository_id_str
spelling The electronic origin of the zeta potential is supported by the redox mechanism on an aqueous dispersion of exfoliated graphiteOxirreduçãoPotencial zetaGrafiteOxidation-reductionZeta potentialGraffitiArtigo de pesquisaAgradecimentos: JPVD acknowledges FAPESP for the post-doc fellowship (Process: 2020/06604-9). In addition, the authors acknowledge The São Paulo Research Foundation (FAPESP: 2014/50867-3 and 2013/22127-2), National Institute of Science & Technology in Bioanalytics (INCTBio, INCT-MCTI/CNPq/CAPES/FAPs n° 16/2014), National Council for Scientific and Technological Development (CNPq) (Projects: 434303/2016-0 and MCTIC/CNPq/FNDCT/MS/SCTIE/Decit n° 07/2020), and Coordination for the Improvement of Higher Education Personnel (CAPES). Finally, the authors thank the Brazilian Nanotechnology National Laboratory (LNNano) for the XPS and AFM analysesAbstract: Herein we have proposed that a redox mechanism can produce surface charges and negative zeta potential on an aqueous graphite dispersion. Graphite was kept in contact with a concentrated ammonia aqueous solution, washed, and exfoliated in water, resulting in a dispersion with lyophobic nature. Ammonia treatment did not provide functional groups or nitrogen doping to graphite. Moreover, this material was washed twice before sonication to remove most hydroxide. Therefore, neither functional groups, nitrogen atoms, nor hydroxide excess is responsible for the zeta potential. Kelvin probe force microscopy has shown that the ammonia-treated and exfoliated graphite has higher Fermi level than the water-treated material, indicating that the contact between ammonia and graphite promotes redox reactions that provide electrons to graphite. These electrons raise the Fermi level of graphite and generate the negative zeta potential, consequently, they account for the colloidal stabilityCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESPFechadoUNIVERSIDADE ESTADUAL DE CAMPINASDamasceno, João Paulo Vita, 1990-Kubota, Lauro Tatsuo, 1964-2022info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.12733/7906DAMASCENO, João Paulo Vita; KUBOTA, Lauro Tatsuo. The electronic origin of the zeta potential is supported by the redox mechanism on an aqueous dispersion of exfoliated graphite. Angewandte chemie. Weinheim : Wiley, 2022. Vol. 134, n. 52 (Oct., 2022), n. art. e202214995, p. 1-6. Disponível em: https://hdl.handle.net/20.500.12733/7906. Acesso em: 24 mai. 2023.Inglêshttps://repositorio.unicamp.br/acervo/detalhe/1261526reponame:Repositório da Produção Científica e Intelectual da Unicampinstname:Universidade Estadual de Campinas (UNICAMP)instacron:UNICAMPinfo:eu-repo/semantics/openAccess2023-03-16T13:01:05Zoai:https://www.repositorio.unicamp.br/:1261526Repositório InstitucionalPUBhttp://repositorio.unicamp.br/oai/requestreposip@unicamp.bropendoar:2023-03-16T13:01:05Repositório da Produção Científica e Intelectual da Unicamp - Universidade Estadual de Campinas (UNICAMP)false
dc.title.none.fl_str_mv The electronic origin of the zeta potential is supported by the redox mechanism on an aqueous dispersion of exfoliated graphite
title The electronic origin of the zeta potential is supported by the redox mechanism on an aqueous dispersion of exfoliated graphite
spellingShingle The electronic origin of the zeta potential is supported by the redox mechanism on an aqueous dispersion of exfoliated graphite
Damasceno, João Paulo Vita, 1990-
Oxirredução
Potencial zeta
Grafite
Oxidation-reduction
Zeta potential
Graffiti
Artigo de pesquisa
title_short The electronic origin of the zeta potential is supported by the redox mechanism on an aqueous dispersion of exfoliated graphite
title_full The electronic origin of the zeta potential is supported by the redox mechanism on an aqueous dispersion of exfoliated graphite
title_fullStr The electronic origin of the zeta potential is supported by the redox mechanism on an aqueous dispersion of exfoliated graphite
title_full_unstemmed The electronic origin of the zeta potential is supported by the redox mechanism on an aqueous dispersion of exfoliated graphite
title_sort The electronic origin of the zeta potential is supported by the redox mechanism on an aqueous dispersion of exfoliated graphite
author Damasceno, João Paulo Vita, 1990-
author_facet Damasceno, João Paulo Vita, 1990-
Kubota, Lauro Tatsuo, 1964-
author_role author
author2 Kubota, Lauro Tatsuo, 1964-
author2_role author
dc.contributor.none.fl_str_mv UNIVERSIDADE ESTADUAL DE CAMPINAS
dc.contributor.author.fl_str_mv Damasceno, João Paulo Vita, 1990-
Kubota, Lauro Tatsuo, 1964-
dc.subject.por.fl_str_mv Oxirredução
Potencial zeta
Grafite
Oxidation-reduction
Zeta potential
Graffiti
Artigo de pesquisa
topic Oxirredução
Potencial zeta
Grafite
Oxidation-reduction
Zeta potential
Graffiti
Artigo de pesquisa
description Agradecimentos: JPVD acknowledges FAPESP for the post-doc fellowship (Process: 2020/06604-9). In addition, the authors acknowledge The São Paulo Research Foundation (FAPESP: 2014/50867-3 and 2013/22127-2), National Institute of Science & Technology in Bioanalytics (INCTBio, INCT-MCTI/CNPq/CAPES/FAPs n° 16/2014), National Council for Scientific and Technological Development (CNPq) (Projects: 434303/2016-0 and MCTIC/CNPq/FNDCT/MS/SCTIE/Decit n° 07/2020), and Coordination for the Improvement of Higher Education Personnel (CAPES). Finally, the authors thank the Brazilian Nanotechnology National Laboratory (LNNano) for the XPS and AFM analyses
publishDate 2022
dc.date.none.fl_str_mv 2022
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 https://hdl.handle.net/20.500.12733/7906
DAMASCENO, João Paulo Vita; KUBOTA, Lauro Tatsuo. The electronic origin of the zeta potential is supported by the redox mechanism on an aqueous dispersion of exfoliated graphite. Angewandte chemie. Weinheim : Wiley, 2022. Vol. 134, n. 52 (Oct., 2022), n. art. e202214995, p. 1-6. Disponível em: https://hdl.handle.net/20.500.12733/7906. Acesso em: 24 mai. 2023.
url https://hdl.handle.net/20.500.12733/7906
identifier_str_mv DAMASCENO, João Paulo Vita; KUBOTA, Lauro Tatsuo. The electronic origin of the zeta potential is supported by the redox mechanism on an aqueous dispersion of exfoliated graphite. Angewandte chemie. Weinheim : Wiley, 2022. Vol. 134, n. 52 (Oct., 2022), n. art. e202214995, p. 1-6. Disponível em: https://hdl.handle.net/20.500.12733/7906. Acesso em: 24 mai. 2023.
dc.language.iso.fl_str_mv Inglês
language_invalid_str_mv Inglês
dc.relation.none.fl_str_mv https://repositorio.unicamp.br/acervo/detalhe/1261526
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório da Produção Científica e Intelectual da Unicamp
instname:Universidade Estadual de Campinas (UNICAMP)
instacron:UNICAMP
instname_str Universidade Estadual de Campinas (UNICAMP)
instacron_str UNICAMP
institution UNICAMP
reponame_str Repositório da Produção Científica e Intelectual da Unicamp
collection Repositório da Produção Científica e Intelectual da Unicamp
repository.name.fl_str_mv Repositório da Produção Científica e Intelectual da Unicamp - Universidade Estadual de Campinas (UNICAMP)
repository.mail.fl_str_mv reposip@unicamp.br
_version_ 1766887332513841152

Registros relacionados