Eletrodos Quimicamente Modificados com compostos de Cobalto coloidal como sensor eletroquímico de Hidroquinona, Glicose e Lapachol
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações do UNICENTRO |
Texto Completo: | http://tede.unicentro.br:8080/jspui/handle/jspui/755 |
Resumo: | The preparation, characterization and electrochemical behavior of films containing cobalt were studied aiming to explore their electrocatalytic properties, because is important electroactive material. In this study the oxyhydroxide of cobalt [CoO(OH).Acetate and CoO(OH).NO3] were obtained from two precursors: acetate and nitrate of cobalt, respectively, for analysis and comparison of the interference of precursors ions, in the obtained materials. The structural and morphological, and composition characterizations were made by use of these techniques: Simultaneous Thermal Analysis (TGA-DTA), Molecular Spectroscopy (FTIR), Electronic Spectroscopy (UV-Vis), Scanning Electron Microscopy and Energy Dispersive Spectroscopy (SEM - EDS) and X Ray Diffraction (XRD). In the electrochemical study the colloids served of chemical modifier of the electrode [EQM_CoO(OH).Acetate and EQM_CoO(OH).NO3], using as a substrate the platinum (Pt). In this stage, the cyclic voltammetry technique (CV) was used to establish parameters, as sweep speed, concentration, mass transport process, among others. Studies of possible applications as sensors of Glucose (Gli) and Hydroquinone (HQ) at low concentrations were realized. Lastly, of so increasing the efficiency of CoO(OH), this was intercalated in the lamellae of Laponite clay (Lap) by a simple and direct route, in the getting of the Lap_CoO(OH). This mixed material was characterized as for the chemical, morphological, structural and electrochemical composition (with the use of Au and Pt substrates) and applied as an electrochemical of Lapachol (Lapol) sensor. |
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Anaissi, Fauze Jacóhttp://lattes.cnpq.br/5901381058926593http://lattes.cnpq.br/8410453486048179STADNIK, ANDRÉIA2017-07-06T17:20:08Z2016-12-12STADNIK, ANDRÉIA. Eletrodos Quimicamente Modificados com compostos de Cobalto coloidal como sensor eletroquímico de Hidroquinona, Glicose e Lapachol. 2016. 94 f. Tese (Programa de Pós-Graduação em Química - Doutorado) - Universidade Estadual do Centro-Oeste, Guarapuava - PR.http://tede.unicentro.br:8080/jspui/handle/jspui/755The preparation, characterization and electrochemical behavior of films containing cobalt were studied aiming to explore their electrocatalytic properties, because is important electroactive material. In this study the oxyhydroxide of cobalt [CoO(OH).Acetate and CoO(OH).NO3] were obtained from two precursors: acetate and nitrate of cobalt, respectively, for analysis and comparison of the interference of precursors ions, in the obtained materials. The structural and morphological, and composition characterizations were made by use of these techniques: Simultaneous Thermal Analysis (TGA-DTA), Molecular Spectroscopy (FTIR), Electronic Spectroscopy (UV-Vis), Scanning Electron Microscopy and Energy Dispersive Spectroscopy (SEM - EDS) and X Ray Diffraction (XRD). In the electrochemical study the colloids served of chemical modifier of the electrode [EQM_CoO(OH).Acetate and EQM_CoO(OH).NO3], using as a substrate the platinum (Pt). In this stage, the cyclic voltammetry technique (CV) was used to establish parameters, as sweep speed, concentration, mass transport process, among others. Studies of possible applications as sensors of Glucose (Gli) and Hydroquinone (HQ) at low concentrations were realized. Lastly, of so increasing the efficiency of CoO(OH), this was intercalated in the lamellae of Laponite clay (Lap) by a simple and direct route, in the getting of the Lap_CoO(OH). This mixed material was characterized as for the chemical, morphological, structural and electrochemical composition (with the use of Au and Pt substrates) and applied as an electrochemical of Lapachol (Lapol) sensor.A preparação, caracterização e comportamento eletroquímico de filmes contendo cobalto foram estudados, visando explorar suas propriedades eletrocatalíticas, por ser um importante material eletroativo. Neste estudo, o oxi-hidróxido de cobalto [CoO(OH).Acetato] e [CoO(OH).NO3] foram obtidos a partir de dois precursores: acetato e nitrato de cobalto, respectivamente, para análise e comparação da interferência de íons precursores nos materiais obtidos. As caracterizações estruturais e morfológicas, e composição, foram feitas pelo uso das técnicas: Análise Térmica Simultânea (TGA-DTA), Espectroscopia Molecular (FTIR), Espectroscopia Eletrônica (UV-Vis), Microscopia Eletrônica de Varredura e Espectroscopia de Energia Dispersiva (MEV-EDS) e Difração de Raio X (DRX). No estudo eletroquímico os coloides serviram de modificador químico do eletrodo [EQM_CoO(OH).Acetato e EQM_CoO(OH).NO3], usando como substrato a platina (Pt). Nesta etapa, a técnica de Voltametria Cíclica (VC) foi utilizada para estabelecer parâmetros, como velocidade de varredura, concentração, processo de transporte de massa, entre outros. Estudos de possíveis aplicações como sensores de Glicose (Gli) e Hidroquinona (HQ) em baixas concentrações foram realizadas. Por fim, de modo a aumentar a eficiência do CoO(OH), este foi intercalado nas lamelas da argila Laponita (Lap) por uma rota simples e direta, na obtenção de Lap_CoO(OH). Este material misto foi caracterizado quanto à composição química, morfológica, estrutural e eletroquímica (com o uso de substratos de Au e Pt) e aplicado como sensor eletroquímico de Lapachol (Lapol).Submitted by Fabiano Jucá (fjuca@unicentro.br) on 2017-07-06T17:20:08Z No. of bitstreams: 1 ANDRÉIA STADNIK.pdf: 5252826 bytes, checksum: 4c2b6afb8b9ac94305a0631f3ec60ee4 (MD5)Made available in DSpace on 2017-07-06T17:20:08Z (GMT). No. of bitstreams: 1 ANDRÉIA STADNIK.pdf: 5252826 bytes, checksum: 4c2b6afb8b9ac94305a0631f3ec60ee4 (MD5) Previous issue date: 2016-12-12Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESapplication/pdfhttp://tede.unicentro.br:8080/jspui/retrieve/3614/ANDR%c3%89IA%20STADNIK.pdf.jpgporUniversidade Estadual do Centro-OestePrograma de Pós-Graduação em Química (Doutorado)UNICENTROBrasilUnicentro::Departamento de Ciências Exatas e de Tecnologiaoxi-hidróxido de cobaltosensor e Laponitaeletrodo quimicamente modificadocaracterizaçãocobalt oxyhydroxidesensor and Laponitechemically modified electrodecharacterizationCIENCIAS EXATAS E DA TERRA::QUIMICAEletrodos Quimicamente Modificados com compostos de Cobalto coloidal como sensor eletroquímico de Hidroquinona, Glicose e Lapacholinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesis3800526532796635565600600600600-758308430858845636115717003253031171952075167498588264571info:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações do UNICENTROinstname:Universidade Estadual do Centro-Oeste (UNICENTRO)instacron:UNICENTROTHUMBNAILANDRÉIA STADNIK.pdf.jpgANDRÉIA STADNIK.pdf.jpgimage/jpeg2896http://localhost:8080/tede/bitstream/jspui/755/4/ANDR%C3%89IA+STADNIK.pdf.jpg4abafe9f8417ada2a9a8207a4cdd0203MD54TEXTANDRÉIA STADNIK.pdf.txtANDRÉIA STADNIK.pdf.txttext/plain157926http://localhost:8080/tede/bitstream/jspui/755/3/ANDR%C3%89IA+STADNIK.pdf.txt9edb1bfc684dd9e3f927bd6fe5a9efbfMD53ORIGINALANDRÉIA STADNIK.pdfANDRÉIA STADNIK.pdfapplication/pdf5252826http://localhost:8080/tede/bitstream/jspui/755/2/ANDR%C3%89IA+STADNIK.pdf4c2b6afb8b9ac94305a0631f3ec60ee4MD52LICENSElicense.txtlicense.txttext/plain; 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dc.title.por.fl_str_mv |
Eletrodos Quimicamente Modificados com compostos de Cobalto coloidal como sensor eletroquímico de Hidroquinona, Glicose e Lapachol |
title |
Eletrodos Quimicamente Modificados com compostos de Cobalto coloidal como sensor eletroquímico de Hidroquinona, Glicose e Lapachol |
spellingShingle |
Eletrodos Quimicamente Modificados com compostos de Cobalto coloidal como sensor eletroquímico de Hidroquinona, Glicose e Lapachol STADNIK, ANDRÉIA oxi-hidróxido de cobalto sensor e Laponita eletrodo quimicamente modificado caracterização cobalt oxyhydroxide sensor and Laponite chemically modified electrode characterization CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Eletrodos Quimicamente Modificados com compostos de Cobalto coloidal como sensor eletroquímico de Hidroquinona, Glicose e Lapachol |
title_full |
Eletrodos Quimicamente Modificados com compostos de Cobalto coloidal como sensor eletroquímico de Hidroquinona, Glicose e Lapachol |
title_fullStr |
Eletrodos Quimicamente Modificados com compostos de Cobalto coloidal como sensor eletroquímico de Hidroquinona, Glicose e Lapachol |
title_full_unstemmed |
Eletrodos Quimicamente Modificados com compostos de Cobalto coloidal como sensor eletroquímico de Hidroquinona, Glicose e Lapachol |
title_sort |
Eletrodos Quimicamente Modificados com compostos de Cobalto coloidal como sensor eletroquímico de Hidroquinona, Glicose e Lapachol |
author |
STADNIK, ANDRÉIA |
author_facet |
STADNIK, ANDRÉIA |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Anaissi, Fauze Jacó |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/5901381058926593 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/8410453486048179 |
dc.contributor.author.fl_str_mv |
STADNIK, ANDRÉIA |
contributor_str_mv |
Anaissi, Fauze Jacó |
dc.subject.por.fl_str_mv |
oxi-hidróxido de cobalto sensor e Laponita eletrodo quimicamente modificado caracterização |
topic |
oxi-hidróxido de cobalto sensor e Laponita eletrodo quimicamente modificado caracterização cobalt oxyhydroxide sensor and Laponite chemically modified electrode characterization CIENCIAS EXATAS E DA TERRA::QUIMICA |
dc.subject.eng.fl_str_mv |
cobalt oxyhydroxide sensor and Laponite chemically modified electrode characterization |
dc.subject.cnpq.fl_str_mv |
CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
The preparation, characterization and electrochemical behavior of films containing cobalt were studied aiming to explore their electrocatalytic properties, because is important electroactive material. In this study the oxyhydroxide of cobalt [CoO(OH).Acetate and CoO(OH).NO3] were obtained from two precursors: acetate and nitrate of cobalt, respectively, for analysis and comparison of the interference of precursors ions, in the obtained materials. The structural and morphological, and composition characterizations were made by use of these techniques: Simultaneous Thermal Analysis (TGA-DTA), Molecular Spectroscopy (FTIR), Electronic Spectroscopy (UV-Vis), Scanning Electron Microscopy and Energy Dispersive Spectroscopy (SEM - EDS) and X Ray Diffraction (XRD). In the electrochemical study the colloids served of chemical modifier of the electrode [EQM_CoO(OH).Acetate and EQM_CoO(OH).NO3], using as a substrate the platinum (Pt). In this stage, the cyclic voltammetry technique (CV) was used to establish parameters, as sweep speed, concentration, mass transport process, among others. Studies of possible applications as sensors of Glucose (Gli) and Hydroquinone (HQ) at low concentrations were realized. Lastly, of so increasing the efficiency of CoO(OH), this was intercalated in the lamellae of Laponite clay (Lap) by a simple and direct route, in the getting of the Lap_CoO(OH). This mixed material was characterized as for the chemical, morphological, structural and electrochemical composition (with the use of Au and Pt substrates) and applied as an electrochemical of Lapachol (Lapol) sensor. |
publishDate |
2016 |
dc.date.issued.fl_str_mv |
2016-12-12 |
dc.date.accessioned.fl_str_mv |
2017-07-06T17:20:08Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
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doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
STADNIK, ANDRÉIA. Eletrodos Quimicamente Modificados com compostos de Cobalto coloidal como sensor eletroquímico de Hidroquinona, Glicose e Lapachol. 2016. 94 f. Tese (Programa de Pós-Graduação em Química - Doutorado) - Universidade Estadual do Centro-Oeste, Guarapuava - PR. |
dc.identifier.uri.fl_str_mv |
http://tede.unicentro.br:8080/jspui/handle/jspui/755 |
identifier_str_mv |
STADNIK, ANDRÉIA. Eletrodos Quimicamente Modificados com compostos de Cobalto coloidal como sensor eletroquímico de Hidroquinona, Glicose e Lapachol. 2016. 94 f. Tese (Programa de Pós-Graduação em Química - Doutorado) - Universidade Estadual do Centro-Oeste, Guarapuava - PR. |
url |
http://tede.unicentro.br:8080/jspui/handle/jspui/755 |
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por |
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por |
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info:eu-repo/semantics/openAccess |
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openAccess |
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Universidade Estadual do Centro-Oeste |
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Brasil |
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Unicentro::Departamento de Ciências Exatas e de Tecnologia |
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Universidade Estadual do Centro-Oeste |
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