Novas arquiteturas para sensores modificados com materiais nanoestruturados de carbono
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/7926 |
Resumo: | In this work are reported the development of new architectures for sensors using carbon nanomaterials. Firstly, the investigation of the nanomaterials reduced graphene oxide (RGO) and carbon black (CB) in chitosan film (CTS) modifying the surface of a glassy carbon electrode (GCE) for the development of new electrochemical sensor is described. The sensor was characterized by using scanning electron microscopy (SEM), ultraviolet spectroscopy, Fourier transform infrared spectroscopy, dynamic light scattering and cyclic voltammetry (CV). Using the Nicholson method and the results obtained by CV with the proposed RGO-CB-CTS/GCE, the heterogeneous electron transfer rate constant (k0) of 5.6 × 10−3 cm s−1 was obtained. The proposed electrode was applied for the simultaneous determination of dopamine (DA) (neurotransmitter) and paracetamol (PAR) (analgesic). Employing SWV, DA presented an anodic peak at 0.25 V and PAR at 0.50 V vs. Ag/AgCl (3.0 mol L–1 KCl). The analytical curves obtained were linear in the range from 3.9 10–6 to 3.4 10–5 mol L–1 and between 2.0 10–6 and 1.7 10–5 mol L–1 with detection limits of 2.0 10–8 and 5.3 10–8 mol L–1 for DA and PAR, respectively. The developed sensor presented advantages such as simple preparation, low cost of nanomaterials used, fast response (7 s for each measure). Besides, the sensor was successfully applied in the simultaneous determination of the analytes in synthetic urine samples. The second fabricated sensor was based on the modification of a GCE with nanodiamond (Dnano) within a Poly(allylamine hydrochloride) (PAH) film. The Dnano-PAH/GCE sensor was characterized by Fourier transform infrared spectroscopy and cyclic voltammetry. It was observed a stability of the dispersion and a k0 of 2.0 × 10−2 cm s−1 was obtained using the Nicholson method and the results obtained from CV technique. The developed sensor was applied for determination of catechol (CAT) using differential-pulse Baccarin, M. ix voltammetry (DPV). Under optimal experimental conditions, the anodic peak current was linear in the CAT concentration range of 2.0 × 10−6 to 1.1 × 10−4 mol L−1 with a detection limit of 1.5 × 10−6 mol L−1. The proposed method was applied for the determination of CAT in natural water samples, presenting vantages such as fast response (9 s to carry out one measure), selectivity and simplicity of working electrode fabrication. |
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Baccarin, MarinaFatibello Filho, Orlandohttp://lattes.cnpq.br/9859737944357808http://lattes.cnpq.br/1431367087412366bedc3fde-bc2a-4bc9-a0c6-f0d79be288b92016-10-20T13:39:39Z2016-10-20T13:39:39Z2016-02-19BACCARIN, Marina. Novas arquiteturas para sensores modificados com materiais nanoestruturados de carbono. 2016. Dissertação (Mestrado em Química) – Universidade Federal de São Carlos, São Carlos, 2016. Disponível em: https://repositorio.ufscar.br/handle/ufscar/7926.https://repositorio.ufscar.br/handle/ufscar/7926In this work are reported the development of new architectures for sensors using carbon nanomaterials. Firstly, the investigation of the nanomaterials reduced graphene oxide (RGO) and carbon black (CB) in chitosan film (CTS) modifying the surface of a glassy carbon electrode (GCE) for the development of new electrochemical sensor is described. The sensor was characterized by using scanning electron microscopy (SEM), ultraviolet spectroscopy, Fourier transform infrared spectroscopy, dynamic light scattering and cyclic voltammetry (CV). Using the Nicholson method and the results obtained by CV with the proposed RGO-CB-CTS/GCE, the heterogeneous electron transfer rate constant (k0) of 5.6 × 10−3 cm s−1 was obtained. The proposed electrode was applied for the simultaneous determination of dopamine (DA) (neurotransmitter) and paracetamol (PAR) (analgesic). Employing SWV, DA presented an anodic peak at 0.25 V and PAR at 0.50 V vs. Ag/AgCl (3.0 mol L–1 KCl). The analytical curves obtained were linear in the range from 3.9 10–6 to 3.4 10–5 mol L–1 and between 2.0 10–6 and 1.7 10–5 mol L–1 with detection limits of 2.0 10–8 and 5.3 10–8 mol L–1 for DA and PAR, respectively. The developed sensor presented advantages such as simple preparation, low cost of nanomaterials used, fast response (7 s for each measure). Besides, the sensor was successfully applied in the simultaneous determination of the analytes in synthetic urine samples. The second fabricated sensor was based on the modification of a GCE with nanodiamond (Dnano) within a Poly(allylamine hydrochloride) (PAH) film. The Dnano-PAH/GCE sensor was characterized by Fourier transform infrared spectroscopy and cyclic voltammetry. It was observed a stability of the dispersion and a k0 of 2.0 × 10−2 cm s−1 was obtained using the Nicholson method and the results obtained from CV technique. The developed sensor was applied for determination of catechol (CAT) using differential-pulse Baccarin, M. ix voltammetry (DPV). Under optimal experimental conditions, the anodic peak current was linear in the CAT concentration range of 2.0 × 10−6 to 1.1 × 10−4 mol L−1 with a detection limit of 1.5 × 10−6 mol L−1. The proposed method was applied for the determination of CAT in natural water samples, presenting vantages such as fast response (9 s to carry out one measure), selectivity and simplicity of working electrode fabrication.Neste trabalho de mestrado são reportados o desenvolvimento de novas arquiteturas de sensores utilizando nanomateriais de carbono. Assim, primeiramente, a modificação da superfície de um eletrodo de carbono vítreo (GCE) com os nanomateriais óxido de grafeno reduzido (RGO) e carbon black (CB; negro de fumo) em um filme de quitosana (CTS) para o desenvolvimento de um sensor eletroquímico é descrito. O sensor foi caracterizado utilizando a microscopia eletrônica de varredura (SEM), espectroscopia de ultravioleta, infravermelho com transformada de Fourier, espalhamento dinâmico de luz e voltametria cíclica (CV). Utilizando-se o método de Nicholson e dados obtidos por CV a partir do eletrodo RGO-CBCTS/ GCE, a constante heterogênea de transferência de elétrons (k0) de 5,6 × 10−3 cm s−1 foi obtida. O eletrodo proposto foi utilizado na determinação de dopamina (DA) (neurotransmissor) e paracetamol (PAR) (analgésico). Dessa forma, empregando-se a voltametria de onda quadrada (SWV), obteve-se um potencial de pico anódico em 0,25 V para a DA e em 0,50 V para o PAR vs. Ag/AgCl (KCl 3,0 mol L–1). As curvas analíticas obtidas foram lineares nas faixas de 3,9 10–6 a 3,4 10–5 mol L–1 e 2,0 10–6 e 1,7 10–5 mol L–1 com limites de detecção de 2,0 10–8 e 5,3 10–8 mol L–1 para DA e PAR, respectivamente. Foi observado no sensor desenvolvido vantagens como a simples confecção do eletrodo, baixo custo dos nanomateriais utilizados, resposta rápida (7 s para cada medida). Ademais, este sensor foi aplicado com sucesso na determinação simultânea destes analitos em amostras de urina sintética. O segundo sensor desenvolvido foi baseado na modicação da superfície do GCE com nanodiamantes (Dnano) em um filme de hidrocloreto de polialilamina (PAH). O sensor Dnano-PAH/GCE foi caracterizado utilizando-se um espectrômetro de infravermelho com transformada de Fourier e CV. A Baccarin, M. vii dispersão destes materiais em água foi estável e um k0 igual a 2,0 × 10−2 cm s−1 foi estimado utilizando o método de Nicholson e dados de CV. O sensor desenvolvido foi usado para a determinação de catecol (CAT) utilizando-se a voltametria de pulso diferencial (DPV). Após as condições experimentais otimizadas, a corrente de pico anódica para o CAT foi linear na faixa de concentração de 2,0 × 10−6 a 1,1 × 10−4 mol L−1 com um limite de detecção de 1,5 × 10−6 mol L−1. O método proposto foi aplicado para a determinação de CAT em amostras de águas naturais, com algumas vantagens como resposta rápida (9 s para realizar cada medida), seletividade e simplicidade de construção do eletrodo de trabalho.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)porUniversidade Federal de São CarlosCâmpus São CarlosPrograma de Pós-Graduação em Química - PPGQUFSCarSensoresMateriaisCarbonoNanoestruturadosCIENCIAS EXATAS E DA TERRA::QUIMICANovas arquiteturas para sensores modificados com materiais nanoestruturados de carbonoNew architectures for sensors using carbon nanomaterialsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisOnline6006007a1dec22-4b2d-4dba-8971-ab07f55c7d54info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALDissMBna.pdfDissMBna.pdfapplication/pdf2964648https://repositorio.ufscar.br/bitstream/ufscar/7926/1/DissMBna.pdfaa3df289cd70876ea15262c53880aca3MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81957https://repositorio.ufscar.br/bitstream/ufscar/7926/2/license.txtae0398b6f8b235e40ad82cba6c50031dMD52TEXTDissMBna.pdf.txtDissMBna.pdf.txtExtracted texttext/plain158567https://repositorio.ufscar.br/bitstream/ufscar/7926/3/DissMBna.pdf.txt682a9456293f39c26af07d9cc985fed1MD53THUMBNAILDissMBna.pdf.jpgDissMBna.pdf.jpgIM Thumbnailimage/jpeg10110https://repositorio.ufscar.br/bitstream/ufscar/7926/4/DissMBna.pdf.jpg8ea121b6678feacd6834ba463c936542MD54ufscar/79262023-09-18 18:31:01.368oai:repositorio.ufscar.br:ufscar/7926TElDRU7Dh0EgREUgRElTVFJJQlVJw4fDg08gTsODTy1FWENMVVNJVkEKCkNvbSBhIGFwcmVzZW50YcOnw6NvIGRlc3RhIGxpY2Vuw6dhLCB2b2PDqiAobyBhdXRvciAoZXMpIG91IG8gdGl0dWxhciBkb3MgZGlyZWl0b3MgZGUgYXV0b3IpIGNvbmNlZGUgw6AgVW5pdmVyc2lkYWRlCkZlZGVyYWwgZGUgU8OjbyBDYXJsb3MgbyBkaXJlaXRvIG7Do28tZXhjbHVzaXZvIGRlIHJlcHJvZHV6aXIsICB0cmFkdXppciAoY29uZm9ybWUgZGVmaW5pZG8gYWJhaXhvKSwgZS9vdQpkaXN0cmlidWlyIGEgc3VhIHRlc2Ugb3UgZGlzc2VydGHDp8OjbyAoaW5jbHVpbmRvIG8gcmVzdW1vKSBwb3IgdG9kbyBvIG11bmRvIG5vIGZvcm1hdG8gaW1wcmVzc28gZSBlbGV0csO0bmljbyBlCmVtIHF1YWxxdWVyIG1laW8sIGluY2x1aW5kbyBvcyBmb3JtYXRvcyDDoXVkaW8gb3UgdsOtZGVvLgoKVm9jw6ogY29uY29yZGEgcXVlIGEgVUZTQ2FyIHBvZGUsIHNlbSBhbHRlcmFyIG8gY29udGXDumRvLCB0cmFuc3BvciBhIHN1YSB0ZXNlIG91IGRpc3NlcnRhw6fDo28KcGFyYSBxdWFscXVlciBtZWlvIG91IGZvcm1hdG8gcGFyYSBmaW5zIGRlIHByZXNlcnZhw6fDo28uCgpWb2PDqiB0YW1iw6ltIGNvbmNvcmRhIHF1ZSBhIFVGU0NhciBwb2RlIG1hbnRlciBtYWlzIGRlIHVtYSBjw7NwaWEgYSBzdWEgdGVzZSBvdQpkaXNzZXJ0YcOnw6NvIHBhcmEgZmlucyBkZSBzZWd1cmFuw6dhLCBiYWNrLXVwIGUgcHJlc2VydmHDp8Ojby4KClZvY8OqIGRlY2xhcmEgcXVlIGEgc3VhIHRlc2Ugb3UgZGlzc2VydGHDp8OjbyDDqSBvcmlnaW5hbCBlIHF1ZSB2b2PDqiB0ZW0gbyBwb2RlciBkZSBjb25jZWRlciBvcyBkaXJlaXRvcyBjb250aWRvcwpuZXN0YSBsaWNlbsOnYS4gVm9jw6ogdGFtYsOpbSBkZWNsYXJhIHF1ZSBvIGRlcMOzc2l0byBkYSBzdWEgdGVzZSBvdSBkaXNzZXJ0YcOnw6NvIG7Do28sIHF1ZSBzZWphIGRlIHNldQpjb25oZWNpbWVudG8sIGluZnJpbmdlIGRpcmVpdG9zIGF1dG9yYWlzIGRlIG5pbmd1w6ltLgoKQ2FzbyBhIHN1YSB0ZXNlIG91IGRpc3NlcnRhw6fDo28gY29udGVuaGEgbWF0ZXJpYWwgcXVlIHZvY8OqIG7Do28gcG9zc3VpIGEgdGl0dWxhcmlkYWRlIGRvcyBkaXJlaXRvcyBhdXRvcmFpcywgdm9jw6oKZGVjbGFyYSBxdWUgb2J0ZXZlIGEgcGVybWlzc8OjbyBpcnJlc3RyaXRhIGRvIGRldGVudG9yIGRvcyBkaXJlaXRvcyBhdXRvcmFpcyBwYXJhIGNvbmNlZGVyIMOgIFVGU0NhcgpvcyBkaXJlaXRvcyBhcHJlc2VudGFkb3MgbmVzdGEgbGljZW7Dp2EsIGUgcXVlIGVzc2UgbWF0ZXJpYWwgZGUgcHJvcHJpZWRhZGUgZGUgdGVyY2Vpcm9zIGVzdMOhIGNsYXJhbWVudGUKaWRlbnRpZmljYWRvIGUgcmVjb25oZWNpZG8gbm8gdGV4dG8gb3Ugbm8gY29udGXDumRvIGRhIHRlc2Ugb3UgZGlzc2VydGHDp8OjbyBvcmEgZGVwb3NpdGFkYS4KCkNBU08gQSBURVNFIE9VIERJU1NFUlRBw4fDg08gT1JBIERFUE9TSVRBREEgVEVOSEEgU0lETyBSRVNVTFRBRE8gREUgVU0gUEFUUk9Dw41OSU8gT1UKQVBPSU8gREUgVU1BIEFHw4pOQ0lBIERFIEZPTUVOVE8gT1UgT1VUUk8gT1JHQU5JU01PIFFVRSBOw4NPIFNFSkEgQSBVRlNDYXIsClZPQ8OKIERFQ0xBUkEgUVVFIFJFU1BFSVRPVSBUT0RPUyBFIFFVQUlTUVVFUiBESVJFSVRPUyBERSBSRVZJU8ODTyBDT01PClRBTULDiU0gQVMgREVNQUlTIE9CUklHQcOHw5VFUyBFWElHSURBUyBQT1IgQ09OVFJBVE8gT1UgQUNPUkRPLgoKQSBVRlNDYXIgc2UgY29tcHJvbWV0ZSBhIGlkZW50aWZpY2FyIGNsYXJhbWVudGUgbyBzZXUgbm9tZSAocykgb3UgbyhzKSBub21lKHMpIGRvKHMpCmRldGVudG9yKGVzKSBkb3MgZGlyZWl0b3MgYXV0b3JhaXMgZGEgdGVzZSBvdSBkaXNzZXJ0YcOnw6NvLCBlIG7Do28gZmFyw6EgcXVhbHF1ZXIgYWx0ZXJhw6fDo28sIGFsw6ltIGRhcXVlbGFzCmNvbmNlZGlkYXMgcG9yIGVzdGEgbGljZW7Dp2EuCg==Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:31:01Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Novas arquiteturas para sensores modificados com materiais nanoestruturados de carbono |
dc.title.alternative.eng.fl_str_mv |
New architectures for sensors using carbon nanomaterials |
title |
Novas arquiteturas para sensores modificados com materiais nanoestruturados de carbono |
spellingShingle |
Novas arquiteturas para sensores modificados com materiais nanoestruturados de carbono Baccarin, Marina Sensores Materiais Carbono Nanoestruturados CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Novas arquiteturas para sensores modificados com materiais nanoestruturados de carbono |
title_full |
Novas arquiteturas para sensores modificados com materiais nanoestruturados de carbono |
title_fullStr |
Novas arquiteturas para sensores modificados com materiais nanoestruturados de carbono |
title_full_unstemmed |
Novas arquiteturas para sensores modificados com materiais nanoestruturados de carbono |
title_sort |
Novas arquiteturas para sensores modificados com materiais nanoestruturados de carbono |
author |
Baccarin, Marina |
author_facet |
Baccarin, Marina |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/1431367087412366 |
dc.contributor.author.fl_str_mv |
Baccarin, Marina |
dc.contributor.advisor1.fl_str_mv |
Fatibello Filho, Orlando |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/9859737944357808 |
dc.contributor.authorID.fl_str_mv |
bedc3fde-bc2a-4bc9-a0c6-f0d79be288b9 |
contributor_str_mv |
Fatibello Filho, Orlando |
dc.subject.por.fl_str_mv |
Sensores Materiais Carbono Nanoestruturados |
topic |
Sensores Materiais Carbono Nanoestruturados CIENCIAS EXATAS E DA TERRA::QUIMICA |
dc.subject.cnpq.fl_str_mv |
CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
In this work are reported the development of new architectures for sensors using carbon nanomaterials. Firstly, the investigation of the nanomaterials reduced graphene oxide (RGO) and carbon black (CB) in chitosan film (CTS) modifying the surface of a glassy carbon electrode (GCE) for the development of new electrochemical sensor is described. The sensor was characterized by using scanning electron microscopy (SEM), ultraviolet spectroscopy, Fourier transform infrared spectroscopy, dynamic light scattering and cyclic voltammetry (CV). Using the Nicholson method and the results obtained by CV with the proposed RGO-CB-CTS/GCE, the heterogeneous electron transfer rate constant (k0) of 5.6 × 10−3 cm s−1 was obtained. The proposed electrode was applied for the simultaneous determination of dopamine (DA) (neurotransmitter) and paracetamol (PAR) (analgesic). Employing SWV, DA presented an anodic peak at 0.25 V and PAR at 0.50 V vs. Ag/AgCl (3.0 mol L–1 KCl). The analytical curves obtained were linear in the range from 3.9 10–6 to 3.4 10–5 mol L–1 and between 2.0 10–6 and 1.7 10–5 mol L–1 with detection limits of 2.0 10–8 and 5.3 10–8 mol L–1 for DA and PAR, respectively. The developed sensor presented advantages such as simple preparation, low cost of nanomaterials used, fast response (7 s for each measure). Besides, the sensor was successfully applied in the simultaneous determination of the analytes in synthetic urine samples. The second fabricated sensor was based on the modification of a GCE with nanodiamond (Dnano) within a Poly(allylamine hydrochloride) (PAH) film. The Dnano-PAH/GCE sensor was characterized by Fourier transform infrared spectroscopy and cyclic voltammetry. It was observed a stability of the dispersion and a k0 of 2.0 × 10−2 cm s−1 was obtained using the Nicholson method and the results obtained from CV technique. The developed sensor was applied for determination of catechol (CAT) using differential-pulse Baccarin, M. ix voltammetry (DPV). Under optimal experimental conditions, the anodic peak current was linear in the CAT concentration range of 2.0 × 10−6 to 1.1 × 10−4 mol L−1 with a detection limit of 1.5 × 10−6 mol L−1. The proposed method was applied for the determination of CAT in natural water samples, presenting vantages such as fast response (9 s to carry out one measure), selectivity and simplicity of working electrode fabrication. |
publishDate |
2016 |
dc.date.accessioned.fl_str_mv |
2016-10-20T13:39:39Z |
dc.date.available.fl_str_mv |
2016-10-20T13:39:39Z |
dc.date.issued.fl_str_mv |
2016-02-19 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
BACCARIN, Marina. Novas arquiteturas para sensores modificados com materiais nanoestruturados de carbono. 2016. Dissertação (Mestrado em Química) – Universidade Federal de São Carlos, São Carlos, 2016. Disponível em: https://repositorio.ufscar.br/handle/ufscar/7926. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/7926 |
identifier_str_mv |
BACCARIN, Marina. Novas arquiteturas para sensores modificados com materiais nanoestruturados de carbono. 2016. Dissertação (Mestrado em Química) – Universidade Federal de São Carlos, São Carlos, 2016. Disponível em: https://repositorio.ufscar.br/handle/ufscar/7926. |
url |
https://repositorio.ufscar.br/handle/ufscar/7926 |
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info:eu-repo/semantics/openAccess |
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openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de São Carlos Câmpus São Carlos |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Química - PPGQ |
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UFSCar |
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Universidade Federal de São Carlos Câmpus São Carlos |
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