Electrical behavior of cerium dioxide films exposed to different gases atmospheres
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.ceramint.2016.06.151 http://hdl.handle.net/11449/178176 |
Resumo: | Here we present an easy-reproducible microwave-assisted hydrothermal route for preparing pure nanocrystalline CeO2 films. The produced materials were characterized using a wide range of techniques (X-ray diffraction, field emission gun scanning electron microscopy, Raman spectroscopy) to understand the synthesis dependent changes in crystallographic structure, and crystallite size. Raman and X-ray diffraction techniques revealed that the films were free of secondary phases and that they crystallize in the cubic structure. The observed hydrodynamic particle size larger than the crystallite size confirms the aggregation phenomenon. Gas sensing measurements have been carried out to rationalize the type and number of surface adsorbed groups and overall nanostructure. Electrical conductance variations, owing to gases adsorption onto semiconductor oxide films surfaces, were observed in this work. Chemiresistive CeO2 film properties depend on the intergranular barrier heights and width. |
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Electrical behavior of cerium dioxide films exposed to different gases atmospheresA. FilmsB. DefectsC. Chemical propertiesD. CeO2E. SensorsHere we present an easy-reproducible microwave-assisted hydrothermal route for preparing pure nanocrystalline CeO2 films. The produced materials were characterized using a wide range of techniques (X-ray diffraction, field emission gun scanning electron microscopy, Raman spectroscopy) to understand the synthesis dependent changes in crystallographic structure, and crystallite size. Raman and X-ray diffraction techniques revealed that the films were free of secondary phases and that they crystallize in the cubic structure. The observed hydrodynamic particle size larger than the crystallite size confirms the aggregation phenomenon. Gas sensing measurements have been carried out to rationalize the type and number of surface adsorbed groups and overall nanostructure. Electrical conductance variations, owing to gases adsorption onto semiconductor oxide films surfaces, were observed in this work. Chemiresistive CeO2 film properties depend on the intergranular barrier heights and width.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Faculty of Engineering of Guaratinguetá São Paulo State University – UNESP, Av. Dr Ariberto Pereira da Cunha 333, Bairro Pedregulho, P.O. Box 355Interdisciplinary Laboratory of Electrochemistry and Ceramics LIEC – Chemistry Institute São Paulo State University – UNESP, Prof. Francisco Degni Street, 55, QuitandinhaResearch Institute of Materials Science and Technology (INTEMA) National University of Mar del Plata (CONICET), Juan B. Justo Street 4302Faculty of Engineering of Guaratinguetá São Paulo State University – UNESP, Av. Dr Ariberto Pereira da Cunha 333, Bairro Pedregulho, P.O. Box 355Interdisciplinary Laboratory of Electrochemistry and Ceramics LIEC – Chemistry Institute São Paulo State University – UNESP, Prof. Francisco Degni Street, 55, QuitandinhaFAPESP: 2013/07296-2CNPq: 573636/2008-7Universidade Estadual Paulista (Unesp)National University of Mar del Plata (CONICET)Deus, R. C. [UNESP]Amoresi, R. A.C. [UNESP]Desimone, P. M.Schipani, F.Rocha, L. S.R. [UNESP]Ponce, M. A.Simoes, A. Z. [UNESP]Longo, E. [UNESP]2018-12-11T17:29:09Z2018-12-11T17:29:09Z2016-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article15023-15029application/pdfhttp://dx.doi.org/10.1016/j.ceramint.2016.06.151Ceramics International, v. 42, n. 13, p. 15023-15029, 2016.0272-8842http://hdl.handle.net/11449/17817610.1016/j.ceramint.2016.06.1512-s2.0-849796919432-s2.0-84979691943.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengCeramics International0,784info:eu-repo/semantics/openAccess2024-07-02T15:03:29Zoai:repositorio.unesp.br:11449/178176Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:08:21.397302Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Electrical behavior of cerium dioxide films exposed to different gases atmospheres |
title |
Electrical behavior of cerium dioxide films exposed to different gases atmospheres |
spellingShingle |
Electrical behavior of cerium dioxide films exposed to different gases atmospheres Deus, R. C. [UNESP] A. Films B. Defects C. Chemical properties D. CeO2 E. Sensors |
title_short |
Electrical behavior of cerium dioxide films exposed to different gases atmospheres |
title_full |
Electrical behavior of cerium dioxide films exposed to different gases atmospheres |
title_fullStr |
Electrical behavior of cerium dioxide films exposed to different gases atmospheres |
title_full_unstemmed |
Electrical behavior of cerium dioxide films exposed to different gases atmospheres |
title_sort |
Electrical behavior of cerium dioxide films exposed to different gases atmospheres |
author |
Deus, R. C. [UNESP] |
author_facet |
Deus, R. C. [UNESP] Amoresi, R. A.C. [UNESP] Desimone, P. M. Schipani, F. Rocha, L. S.R. [UNESP] Ponce, M. A. Simoes, A. Z. [UNESP] Longo, E. [UNESP] |
author_role |
author |
author2 |
Amoresi, R. A.C. [UNESP] Desimone, P. M. Schipani, F. Rocha, L. S.R. [UNESP] Ponce, M. A. Simoes, A. Z. [UNESP] Longo, E. [UNESP] |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) National University of Mar del Plata (CONICET) |
dc.contributor.author.fl_str_mv |
Deus, R. C. [UNESP] Amoresi, R. A.C. [UNESP] Desimone, P. M. Schipani, F. Rocha, L. S.R. [UNESP] Ponce, M. A. Simoes, A. Z. [UNESP] Longo, E. [UNESP] |
dc.subject.por.fl_str_mv |
A. Films B. Defects C. Chemical properties D. CeO2 E. Sensors |
topic |
A. Films B. Defects C. Chemical properties D. CeO2 E. Sensors |
description |
Here we present an easy-reproducible microwave-assisted hydrothermal route for preparing pure nanocrystalline CeO2 films. The produced materials were characterized using a wide range of techniques (X-ray diffraction, field emission gun scanning electron microscopy, Raman spectroscopy) to understand the synthesis dependent changes in crystallographic structure, and crystallite size. Raman and X-ray diffraction techniques revealed that the films were free of secondary phases and that they crystallize in the cubic structure. The observed hydrodynamic particle size larger than the crystallite size confirms the aggregation phenomenon. Gas sensing measurements have been carried out to rationalize the type and number of surface adsorbed groups and overall nanostructure. Electrical conductance variations, owing to gases adsorption onto semiconductor oxide films surfaces, were observed in this work. Chemiresistive CeO2 film properties depend on the intergranular barrier heights and width. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-10-01 2018-12-11T17:29:09Z 2018-12-11T17:29:09Z |
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/10.1016/j.ceramint.2016.06.151 Ceramics International, v. 42, n. 13, p. 15023-15029, 2016. 0272-8842 http://hdl.handle.net/11449/178176 10.1016/j.ceramint.2016.06.151 2-s2.0-84979691943 2-s2.0-84979691943.pdf |
url |
http://dx.doi.org/10.1016/j.ceramint.2016.06.151 http://hdl.handle.net/11449/178176 |
identifier_str_mv |
Ceramics International, v. 42, n. 13, p. 15023-15029, 2016. 0272-8842 10.1016/j.ceramint.2016.06.151 2-s2.0-84979691943 2-s2.0-84979691943.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ceramics International 0,784 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
15023-15029 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_ |
1808128321060339712 |