Thermal and electrochemical studies of Cu(II) 8-hydroxyquinoline organophilic montmorillonite
Autor(a) principal: | |
---|---|
Data de Publicação: | 2018 |
Outros Autores: | , , , , , , |
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. |
id |
UNSP_8d7a4207ce2e842587327838695f0478 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/175016 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
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 |
|
_version_ |
1808129486618624000 |