Effect of reaction time on the particle size of ZnO and ZnO : Ce obtained by a sol-gel method

Detalhes bibliográficos
Autor(a) principal: Flor, J.
Data de Publicação: 2004
Outros Autores: de Lima, SAM, Davolos, Marian Rosaly [UNESP]
Tipo de documento: Artigo de conferência
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1007/b97093
http://hdl.handle.net/11449/39599
Resumo: In this work particles of ZnO of size range 33-56 Angstrom were prepared by a sol-gel method. The effect of reaction time on the particle size of ZnO or ZnO:Ce was investigated by transmission electron microscopy measurements, UV-vis absorption and luminescence spectroscopy. A linear increase of the mean particle size is observed as a function of reaction time. The cerium-doped particles are bigger than the pure ZnO ones obtained at the same reaction time. A shift to lower energy at the maximum of the bands is observed in all absorption, emission and excitation spectra as a function of particle growth. From the absorption spectra the optical energy gap values (Eg) for these particles were determined. In the quantum size regime, Eg was found to decrease with particle growth.
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spelling Effect of reaction time on the particle size of ZnO and ZnO : Ce obtained by a sol-gel methodceriumzinc oxidenanoparticleluminescenceIn this work particles of ZnO of size range 33-56 Angstrom were prepared by a sol-gel method. The effect of reaction time on the particle size of ZnO or ZnO:Ce was investigated by transmission electron microscopy measurements, UV-vis absorption and luminescence spectroscopy. A linear increase of the mean particle size is observed as a function of reaction time. The cerium-doped particles are bigger than the pure ZnO ones obtained at the same reaction time. A shift to lower energy at the maximum of the bands is observed in all absorption, emission and excitation spectra as a function of particle growth. From the absorption spectra the optical energy gap values (Eg) for these particles were determined. In the quantum size regime, Eg was found to decrease with particle growth.Univ Estadual Paulista, Inst Quim, BR-14801970 Araraquara, SP, BrazilUniv Estadual Paulista, Inst Quim, BR-14801970 Araraquara, SP, BrazilSpringerUniversidade Estadual Paulista (Unesp)Flor, J.de Lima, SAMDavolos, Marian Rosaly [UNESP]2014-05-20T15:30:09Z2014-05-20T15:30:09Z2004-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject239-243http://dx.doi.org/10.1007/b97093Surface and Colloid Science. Berlin: Springer-verlag Berlin, v. 128, p. 239-243, 2004.0340-255Xhttp://hdl.handle.net/11449/3959910.1007/b97093WOS:0002270209000464284809342546287Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengSurface and Colloid Scienceinfo:eu-repo/semantics/openAccess2021-10-23T21:41:25Zoai:repositorio.unesp.br:11449/39599Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:47:29.133163Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Effect of reaction time on the particle size of ZnO and ZnO : Ce obtained by a sol-gel method
title Effect of reaction time on the particle size of ZnO and ZnO : Ce obtained by a sol-gel method
spellingShingle Effect of reaction time on the particle size of ZnO and ZnO : Ce obtained by a sol-gel method
Flor, J.
cerium
zinc oxide
nanoparticle
luminescence
title_short Effect of reaction time on the particle size of ZnO and ZnO : Ce obtained by a sol-gel method
title_full Effect of reaction time on the particle size of ZnO and ZnO : Ce obtained by a sol-gel method
title_fullStr Effect of reaction time on the particle size of ZnO and ZnO : Ce obtained by a sol-gel method
title_full_unstemmed Effect of reaction time on the particle size of ZnO and ZnO : Ce obtained by a sol-gel method
title_sort Effect of reaction time on the particle size of ZnO and ZnO : Ce obtained by a sol-gel method
author Flor, J.
author_facet Flor, J.
de Lima, SAM
Davolos, Marian Rosaly [UNESP]
author_role author
author2 de Lima, SAM
Davolos, Marian Rosaly [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Flor, J.
de Lima, SAM
Davolos, Marian Rosaly [UNESP]
dc.subject.por.fl_str_mv cerium
zinc oxide
nanoparticle
luminescence
topic cerium
zinc oxide
nanoparticle
luminescence
description In this work particles of ZnO of size range 33-56 Angstrom were prepared by a sol-gel method. The effect of reaction time on the particle size of ZnO or ZnO:Ce was investigated by transmission electron microscopy measurements, UV-vis absorption and luminescence spectroscopy. A linear increase of the mean particle size is observed as a function of reaction time. The cerium-doped particles are bigger than the pure ZnO ones obtained at the same reaction time. A shift to lower energy at the maximum of the bands is observed in all absorption, emission and excitation spectra as a function of particle growth. From the absorption spectra the optical energy gap values (Eg) for these particles were determined. In the quantum size regime, Eg was found to decrease with particle growth.
publishDate 2004
dc.date.none.fl_str_mv 2004-01-01
2014-05-20T15:30:09Z
2014-05-20T15:30:09Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/conferenceObject
format conferenceObject
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1007/b97093
Surface and Colloid Science. Berlin: Springer-verlag Berlin, v. 128, p. 239-243, 2004.
0340-255X
http://hdl.handle.net/11449/39599
10.1007/b97093
WOS:000227020900046
4284809342546287
url http://dx.doi.org/10.1007/b97093
http://hdl.handle.net/11449/39599
identifier_str_mv Surface and Colloid Science. Berlin: Springer-verlag Berlin, v. 128, p. 239-243, 2004.
0340-255X
10.1007/b97093
WOS:000227020900046
4284809342546287
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Surface and Colloid Science
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 239-243
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv Web of Science
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_ 1808129552554131456

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