Encapsulated alizarin red species: The role of the sol–gel route on the interaction with silica matrix

Detalhes bibliográficos
Autor(a) principal: Capeletti, Larissa Brentano
Data de Publicação: 2013
Outros Autores: Santos, João Henrique Zimnoch dos, Moncada, Edwin, Rocha, Zenis N. da, Pepe, Iuri Muniz
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/12023
Resumo: Texto completo. Acesso restrito. p. 117–124
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spelling Capeletti, Larissa BrentanoSantos, João Henrique Zimnoch dosMoncada, EdwinRocha, Zenis N. daPepe, Iuri MunizCapeletti, Larissa BrentanoSantos, João Henrique Zimnoch dosMoncada, EdwinRocha, Zenis N. daPepe, Iuri Muniz2013-06-26T13:31:02Z2013-06-26T13:31:02Z20130032-5910http://www.repositorio.ufba.br/ri/handle/ri/12023v. 237Texto completo. Acesso restrito. p. 117–124Solid acid–base sensors were prepared by encapsulating alizarin red pH indicator within a silica matrix using the sol–gel method with four different routes: (1) non-hydrolytic, (2) acid catalyzed, (3) basic catalyzed and (4) without catalyst hydrolytic. The silica–indicator interactions in the resulting materials were investigated by cyclic and differential pulse voltammetry. Ultraviolet–visible photoacoustic spectroscopy was also employed in the characterization. The absorption band shift (49 to 72 nm, depending on the route) between neat alizarin and alizarin encapsulated within the silica network was observed. The electrochemical behavior and the pH indicator interactions with the silica network were dependent on the nature of the employed sol–gel route. For the sensors prepared by the acid and hydrolytic (without catalyst) routes, the interactions with the silica network occurred through alizarin red hydroxyl groups. For the basic route, different cathodic and anodic peaks were observed depending on the pH, suggesting different phenomena during preparation or analysis. In the non-hydrolytic route, it is possible that the quinone form of alizarin red was consumed during the process. The voltammetric results were related to the sensor performance, whereby the acid route produced a solid sensor with the shortest response time, probably because alizarin structure was preserved after the synthetic process.Submitted by Santiago Fabio (fabio.ssantiago@hotmail.com) on 2013-06-26T13:31:02Z No. of bitstreams: 1 222222222222.pdf: 1169758 bytes, checksum: 9a29ff82116535957ee24667b9b5d00c (MD5)Made available in DSpace on 2013-06-26T13:31:02Z (GMT). No. of bitstreams: 1 222222222222.pdf: 1169758 bytes, checksum: 9a29ff82116535957ee24667b9b5d00c (MD5) Previous issue date: 2013SalvadorPowder Technologyhttp://dx.doi.org/10.1016/j.powtec.2013.01.034reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAEncapsulated alizarin red species: The role of the sol–gel route on the interaction with silica matrixPowder Technologyinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleenginfo:eu-repo/semantics/openAccessORIGINAL222222222222.pdf222222222222.pdfapplication/pdf1169758https://repositorio.ufba.br/bitstream/ri/12023/1/222222222222.pdf9a29ff82116535957ee24667b9b5d00cMD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/12023/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXT222222222222.pdf.txt222222222222.pdf.txtExtracted texttext/plain41949https://repositorio.ufba.br/bitstream/ri/12023/3/222222222222.pdf.txte9d3c701f7e1de40dfa6f05cff0d2f92MD53ri/120232022-07-05 14:03:44.621oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:44Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv Encapsulated alizarin red species: The role of the sol–gel route on the interaction with silica matrix
dc.title.alternative.pt_BR.fl_str_mv Powder Technology
title Encapsulated alizarin red species: The role of the sol–gel route on the interaction with silica matrix
spellingShingle Encapsulated alizarin red species: The role of the sol–gel route on the interaction with silica matrix
Capeletti, Larissa Brentano
title_short Encapsulated alizarin red species: The role of the sol–gel route on the interaction with silica matrix
title_full Encapsulated alizarin red species: The role of the sol–gel route on the interaction with silica matrix
title_fullStr Encapsulated alizarin red species: The role of the sol–gel route on the interaction with silica matrix
title_full_unstemmed Encapsulated alizarin red species: The role of the sol–gel route on the interaction with silica matrix
title_sort Encapsulated alizarin red species: The role of the sol–gel route on the interaction with silica matrix
author Capeletti, Larissa Brentano
author_facet Capeletti, Larissa Brentano
Santos, João Henrique Zimnoch dos
Moncada, Edwin
Rocha, Zenis N. da
Pepe, Iuri Muniz
author_role author
author2 Santos, João Henrique Zimnoch dos
Moncada, Edwin
Rocha, Zenis N. da
Pepe, Iuri Muniz
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Capeletti, Larissa Brentano
Santos, João Henrique Zimnoch dos
Moncada, Edwin
Rocha, Zenis N. da
Pepe, Iuri Muniz
Capeletti, Larissa Brentano
Santos, João Henrique Zimnoch dos
Moncada, Edwin
Rocha, Zenis N. da
Pepe, Iuri Muniz
description Texto completo. Acesso restrito. p. 117–124
publishDate 2013
dc.date.accessioned.fl_str_mv 2013-06-26T13:31:02Z
dc.date.available.fl_str_mv 2013-06-26T13:31:02Z
dc.date.issued.fl_str_mv 2013
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://www.repositorio.ufba.br/ri/handle/ri/12023
dc.identifier.issn.none.fl_str_mv 0032-5910
dc.identifier.number.pt_BR.fl_str_mv v. 237
identifier_str_mv 0032-5910
v. 237
url http://www.repositorio.ufba.br/ri/handle/ri/12023
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Powder Technology
publisher.none.fl_str_mv Powder Technology
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1016/j.powtec.2013.01.034
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
instacron:UFBA
instname_str Universidade Federal da Bahia (UFBA)
instacron_str UFBA
institution UFBA
reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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