Study on the structural and electrocatalytic properties of Ba2+- and Eu3+-doped silica xerogels as sensory platforms
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1039/c6ra22508j http://hdl.handle.net/11449/169105 |
Resumo: | This work reports on the sol-gel synthesis of barium- and europium-doped silica xerogel and its use as an electrocatalytic sensor. Barium was chosen to assist the network framing and europium to provide electronic properties, including the Eu2+/Eu3+ redox process. The results from different molecular and structural techniques indicated that this xerogel is a composite material that combines a non-crystalline polymeric silica network with a high level of agglomeration and a low degree of reticulation formed by the hydrolysis and condensation of TEOS and M-O bonds (M = Ba2+ and/or Eu3+), whereas the oxygen atoms belong to the xerogel phase. The electrochemical behavior of the silica xerogel:Ba2+,Eu3+ with different amounts of Eu3+ under several different conditions was investigated. The electrochemical sensing platform showed a well-defined redox coupling with a formal potential of 0.06 V, assigned to europium redox sites in silicate. Electrocatalytic activity was observed with an increasing anodic peak current to the isoniazid oxidation, indicating that the electrochemical sensing platform designed here was successfully achieved. |
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Repositório Institucional da UNESP |
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spelling |
Study on the structural and electrocatalytic properties of Ba2+- and Eu3+-doped silica xerogels as sensory platformsThis work reports on the sol-gel synthesis of barium- and europium-doped silica xerogel and its use as an electrocatalytic sensor. Barium was chosen to assist the network framing and europium to provide electronic properties, including the Eu2+/Eu3+ redox process. The results from different molecular and structural techniques indicated that this xerogel is a composite material that combines a non-crystalline polymeric silica network with a high level of agglomeration and a low degree of reticulation formed by the hydrolysis and condensation of TEOS and M-O bonds (M = Ba2+ and/or Eu3+), whereas the oxygen atoms belong to the xerogel phase. The electrochemical behavior of the silica xerogel:Ba2+,Eu3+ with different amounts of Eu3+ under several different conditions was investigated. The electrochemical sensing platform showed a well-defined redox coupling with a formal potential of 0.06 V, assigned to europium redox sites in silicate. Electrocatalytic activity was observed with an increasing anodic peak current to the isoniazid oxidation, indicating that the electrochemical sensing platform designed here was successfully achieved.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Faculdade de Ciências e Tecnologia UNESP Univ Estadual Paulista, Rua Roberto Simonsen, 305Instituto de Biociências Letras e Ciências Exatas UNESP Univ Estadual Paulista, Rua Cristóvão Colombo, 2265Instituto de Química de São Carlos Universidade de São Paulo-USPFaculdade de Ciências e Tecnologia UNESP Univ Estadual Paulista, Rua Roberto Simonsen, 305Instituto de Biociências Letras e Ciências Exatas UNESP Univ Estadual Paulista, Rua Cristóvão Colombo, 2265Universidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Raymundo-Pereira, Paulo A. [UNESP]Ceccato, Diego A. [UNESP]Junior, Airton G. B. [UNESP]Teixeira, Marcos F. S. [UNESP]Lima, Sergio A. M. [UNESP]Pires, Ana. M. [UNESP]2018-12-11T16:44:30Z2018-12-11T16:44:30Z2016-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article104529-104536application/pdfhttp://dx.doi.org/10.1039/c6ra22508jRSC Advances, v. 6, n. 106, p. 104529-104536, 2016.2046-2069http://hdl.handle.net/11449/16910510.1039/c6ra22508j2-s2.0-849944691012-s2.0-84994469101.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRSC Advances0,863info:eu-repo/semantics/openAccess2023-12-31T06:15:16Zoai:repositorio.unesp.br:11449/169105Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:44:40.307260Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Study on the structural and electrocatalytic properties of Ba2+- and Eu3+-doped silica xerogels as sensory platforms |
title |
Study on the structural and electrocatalytic properties of Ba2+- and Eu3+-doped silica xerogels as sensory platforms |
spellingShingle |
Study on the structural and electrocatalytic properties of Ba2+- and Eu3+-doped silica xerogels as sensory platforms Raymundo-Pereira, Paulo A. [UNESP] |
title_short |
Study on the structural and electrocatalytic properties of Ba2+- and Eu3+-doped silica xerogels as sensory platforms |
title_full |
Study on the structural and electrocatalytic properties of Ba2+- and Eu3+-doped silica xerogels as sensory platforms |
title_fullStr |
Study on the structural and electrocatalytic properties of Ba2+- and Eu3+-doped silica xerogels as sensory platforms |
title_full_unstemmed |
Study on the structural and electrocatalytic properties of Ba2+- and Eu3+-doped silica xerogels as sensory platforms |
title_sort |
Study on the structural and electrocatalytic properties of Ba2+- and Eu3+-doped silica xerogels as sensory platforms |
author |
Raymundo-Pereira, Paulo A. [UNESP] |
author_facet |
Raymundo-Pereira, Paulo A. [UNESP] Ceccato, Diego A. [UNESP] Junior, Airton G. B. [UNESP] Teixeira, Marcos F. S. [UNESP] Lima, Sergio A. M. [UNESP] Pires, Ana. M. [UNESP] |
author_role |
author |
author2 |
Ceccato, Diego A. [UNESP] Junior, Airton G. B. [UNESP] Teixeira, Marcos F. S. [UNESP] Lima, Sergio A. M. [UNESP] Pires, Ana. M. [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Raymundo-Pereira, Paulo A. [UNESP] Ceccato, Diego A. [UNESP] Junior, Airton G. B. [UNESP] Teixeira, Marcos F. S. [UNESP] Lima, Sergio A. M. [UNESP] Pires, Ana. M. [UNESP] |
description |
This work reports on the sol-gel synthesis of barium- and europium-doped silica xerogel and its use as an electrocatalytic sensor. Barium was chosen to assist the network framing and europium to provide electronic properties, including the Eu2+/Eu3+ redox process. The results from different molecular and structural techniques indicated that this xerogel is a composite material that combines a non-crystalline polymeric silica network with a high level of agglomeration and a low degree of reticulation formed by the hydrolysis and condensation of TEOS and M-O bonds (M = Ba2+ and/or Eu3+), whereas the oxygen atoms belong to the xerogel phase. The electrochemical behavior of the silica xerogel:Ba2+,Eu3+ with different amounts of Eu3+ under several different conditions was investigated. The electrochemical sensing platform showed a well-defined redox coupling with a formal potential of 0.06 V, assigned to europium redox sites in silicate. Electrocatalytic activity was observed with an increasing anodic peak current to the isoniazid oxidation, indicating that the electrochemical sensing platform designed here was successfully achieved. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-01-01 2018-12-11T16:44:30Z 2018-12-11T16:44:30Z |
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/10.1039/c6ra22508j RSC Advances, v. 6, n. 106, p. 104529-104536, 2016. 2046-2069 http://hdl.handle.net/11449/169105 10.1039/c6ra22508j 2-s2.0-84994469101 2-s2.0-84994469101.pdf |
url |
http://dx.doi.org/10.1039/c6ra22508j http://hdl.handle.net/11449/169105 |
identifier_str_mv |
RSC Advances, v. 6, n. 106, p. 104529-104536, 2016. 2046-2069 10.1039/c6ra22508j 2-s2.0-84994469101 2-s2.0-84994469101.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
RSC Advances 0,863 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
104529-104536 application/pdf |
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_ |
1808129353067790336 |