Thermal and electrochemical studies of Cu(II) 8-hydroxyquinoline organophilic montmorillonite

Detalhes bibliográficos
Autor(a) principal: Lupi, Caroline Polini [UNESP]
Data de Publicação: 2018
Outros Autores: Franzin, Bruno Trevizan [UNESP], Pereira, Paulo Roberto [UNESP], Damaceno, Airton Juliano [UNESP], Dadamos, Tony Rogério de Lima [UNESP], dos Santos, Cecilia Cristina Marques, Pastre, Iêda Aparecida [UNESP], Fertonani, Fernando Luis [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1007/s10973-017-6577-9
http://hdl.handle.net/11449/175016
Resumo: The thermal and electrochemical behavior of montmorillonite clay-8-hydroxyquinoline (8-HQ) film was studied in the absence and presence of aqueous Cu(II) ions. The suggested formation of the ternary complex type: {Pt/[> Si–O]n[Cu(II)(OH2)n(8-HQ)k]}3−n−k, with thermal stability up to 350 °C, was studied, based on UV-spectroscopy, thermal (DTG-DSC, molecular fluorescence and XRD. The Pt/binary composite film (SWy-1:8-HQ) interphase composed of montmorillonite (SWy-1) with 8-hydroxyquinoline (8-HQ) was investigated by electrochemical techniques analyzing the cyclic voltammograms (CVs) obtained at different scan rates (v) and copper(II) ion concentrations. The mechanical stability of the thin films was demonstrated by performing 80 successive voltammetric cycles. Two pairs of redox peaks, indicated by peaks A/D and C/B were observed. For Cu(II) ions in solution, the log ip × log v relationships showed processes controlled by adsorption, peaks A/D, and by diffusion, peaks C/B. The analysis of ip/v1/2 and ipa/ipc versus v suggested two homogeneous coupled reactions, being both reversible and fast kinetic chemical reactions, associated to the mechanisms chemical-electrochemical (CE) and electrochemical-chemical (EC), respectively. The modified electrode showed a good sensitivity to low concentrations of Cu(II) ions, which opens the possibility of being used in chemical analysis.
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spelling Thermal and electrochemical studies of Cu(II) 8-hydroxyquinoline organophilic montmorilloniteCu(I)/Cu(II) redox speciesOrganic montmorillonite compositesReversible coupled reactionsTG–DTA simultaneous, Cu(II) ionsThe thermal and electrochemical behavior of montmorillonite clay-8-hydroxyquinoline (8-HQ) film was studied in the absence and presence of aqueous Cu(II) ions. The suggested formation of the ternary complex type: {Pt/[> Si–O]n[Cu(II)(OH2)n(8-HQ)k]}3−n−k, with thermal stability up to 350 °C, was studied, based on UV-spectroscopy, thermal (DTG-DSC, molecular fluorescence and XRD. The Pt/binary composite film (SWy-1:8-HQ) interphase composed of montmorillonite (SWy-1) with 8-hydroxyquinoline (8-HQ) was investigated by electrochemical techniques analyzing the cyclic voltammograms (CVs) obtained at different scan rates (v) and copper(II) ion concentrations. The mechanical stability of the thin films was demonstrated by performing 80 successive voltammetric cycles. Two pairs of redox peaks, indicated by peaks A/D and C/B were observed. For Cu(II) ions in solution, the log ip × log v relationships showed processes controlled by adsorption, peaks A/D, and by diffusion, peaks C/B. The analysis of ip/v1/2 and ipa/ipc versus v suggested two homogeneous coupled reactions, being both reversible and fast kinetic chemical reactions, associated to the mechanisms chemical-electrochemical (CE) and electrochemical-chemical (EC), respectively. The modified electrode showed a good sensitivity to low concentrations of Cu(II) ions, which opens the possibility of being used in chemical analysis.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Departamento de Química Analítica Instituto de Química/IQ/UNESP, Campus AraraquaraDepartamento de Química e Ciências Ambientais/IBILCE/Unesp, Campus São José do Rio PretoInstituto Adolpho Lutz - IALDepartamento de Química Analítica Instituto de Química/IQ/UNESP, Campus AraraquaraDepartamento de Química e Ciências Ambientais/IBILCE/Unesp, Campus São José do Rio PretoUniversidade Estadual Paulista (Unesp)Instituto Adolpho Lutz - IALLupi, Caroline Polini [UNESP]Franzin, Bruno Trevizan [UNESP]Pereira, Paulo Roberto [UNESP]Damaceno, Airton Juliano [UNESP]Dadamos, Tony Rogério de Lima [UNESP]dos Santos, Cecilia Cristina MarquesPastre, Iêda Aparecida [UNESP]Fertonani, Fernando Luis [UNESP]2018-12-11T17:13:52Z2018-12-11T17:13:52Z2018-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article799-810application/pdfhttp://dx.doi.org/10.1007/s10973-017-6577-9Journal of Thermal Analysis and Calorimetry, v. 131, n. 1, p. 799-810, 2018.1588-29261388-6150http://hdl.handle.net/11449/17501610.1007/s10973-017-6577-92-s2.0-850269159632-s2.0-85026915963.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Thermal Analysis and Calorimetry0,5870,587info:eu-repo/semantics/openAccess2024-01-15T06:22:59Zoai:repositorio.unesp.br:11449/175016Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:04:02.653283Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Thermal and electrochemical studies of Cu(II) 8-hydroxyquinoline organophilic montmorillonite
title Thermal and electrochemical studies of Cu(II) 8-hydroxyquinoline organophilic montmorillonite
spellingShingle Thermal and electrochemical studies of Cu(II) 8-hydroxyquinoline organophilic montmorillonite
Lupi, Caroline Polini [UNESP]
Cu(I)/Cu(II) redox species
Organic montmorillonite composites
Reversible coupled reactions
TG–DTA simultaneous, Cu(II) ions
title_short Thermal and electrochemical studies of Cu(II) 8-hydroxyquinoline organophilic montmorillonite
title_full Thermal and electrochemical studies of Cu(II) 8-hydroxyquinoline organophilic montmorillonite
title_fullStr Thermal and electrochemical studies of Cu(II) 8-hydroxyquinoline organophilic montmorillonite
title_full_unstemmed Thermal and electrochemical studies of Cu(II) 8-hydroxyquinoline organophilic montmorillonite
title_sort Thermal and electrochemical studies of Cu(II) 8-hydroxyquinoline organophilic montmorillonite
author Lupi, Caroline Polini [UNESP]
author_facet Lupi, Caroline Polini [UNESP]
Franzin, Bruno Trevizan [UNESP]
Pereira, Paulo Roberto [UNESP]
Damaceno, Airton Juliano [UNESP]
Dadamos, Tony Rogério de Lima [UNESP]
dos Santos, Cecilia Cristina Marques
Pastre, Iêda Aparecida [UNESP]
Fertonani, Fernando Luis [UNESP]
author_role author
author2 Franzin, Bruno Trevizan [UNESP]
Pereira, Paulo Roberto [UNESP]
Damaceno, Airton Juliano [UNESP]
Dadamos, Tony Rogério de Lima [UNESP]
dos Santos, Cecilia Cristina Marques
Pastre, Iêda Aparecida [UNESP]
Fertonani, Fernando Luis [UNESP]
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Instituto Adolpho Lutz - IAL
dc.contributor.author.fl_str_mv Lupi, Caroline Polini [UNESP]
Franzin, Bruno Trevizan [UNESP]
Pereira, Paulo Roberto [UNESP]
Damaceno, Airton Juliano [UNESP]
Dadamos, Tony Rogério de Lima [UNESP]
dos Santos, Cecilia Cristina Marques
Pastre, Iêda Aparecida [UNESP]
Fertonani, Fernando Luis [UNESP]
dc.subject.por.fl_str_mv Cu(I)/Cu(II) redox species
Organic montmorillonite composites
Reversible coupled reactions
TG–DTA simultaneous, Cu(II) ions
topic Cu(I)/Cu(II) redox species
Organic montmorillonite composites
Reversible coupled reactions
TG–DTA simultaneous, Cu(II) ions
description The thermal and electrochemical behavior of montmorillonite clay-8-hydroxyquinoline (8-HQ) film was studied in the absence and presence of aqueous Cu(II) ions. The suggested formation of the ternary complex type: {Pt/[> Si–O]n[Cu(II)(OH2)n(8-HQ)k]}3−n−k, with thermal stability up to 350 °C, was studied, based on UV-spectroscopy, thermal (DTG-DSC, molecular fluorescence and XRD. The Pt/binary composite film (SWy-1:8-HQ) interphase composed of montmorillonite (SWy-1) with 8-hydroxyquinoline (8-HQ) was investigated by electrochemical techniques analyzing the cyclic voltammograms (CVs) obtained at different scan rates (v) and copper(II) ion concentrations. The mechanical stability of the thin films was demonstrated by performing 80 successive voltammetric cycles. Two pairs of redox peaks, indicated by peaks A/D and C/B were observed. For Cu(II) ions in solution, the log ip × log v relationships showed processes controlled by adsorption, peaks A/D, and by diffusion, peaks C/B. The analysis of ip/v1/2 and ipa/ipc versus v suggested two homogeneous coupled reactions, being both reversible and fast kinetic chemical reactions, associated to the mechanisms chemical-electrochemical (CE) and electrochemical-chemical (EC), respectively. The modified electrode showed a good sensitivity to low concentrations of Cu(II) ions, which opens the possibility of being used in chemical analysis.
publishDate 2018
dc.date.none.fl_str_mv 2018-12-11T17:13:52Z
2018-12-11T17:13:52Z
2018-01-01
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/10.1007/s10973-017-6577-9
Journal of Thermal Analysis and Calorimetry, v. 131, n. 1, p. 799-810, 2018.
1588-2926
1388-6150
http://hdl.handle.net/11449/175016
10.1007/s10973-017-6577-9
2-s2.0-85026915963
2-s2.0-85026915963.pdf
url http://dx.doi.org/10.1007/s10973-017-6577-9
http://hdl.handle.net/11449/175016
identifier_str_mv Journal of Thermal Analysis and Calorimetry, v. 131, n. 1, p. 799-810, 2018.
1588-2926
1388-6150
10.1007/s10973-017-6577-9
2-s2.0-85026915963
2-s2.0-85026915963.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal of Thermal Analysis and Calorimetry
0,587
0,587
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 799-810
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
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