Phonon confinement model to measure the average sizes of anatase nanoparticles synthesized by a solvothermal method using H2O2
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.5935/0103-5053.20130136 http://hdl.handle.net/11449/132351 |
Resumo: | In this work, crystalline titanium dioxide (TiO2) nanoparticles with variable average crystallite sizes (e.g., 8 nm) and surface areas (e.g., 192 m² g-1) were synthesized in pure anatase phase using H2O2 to reduce the hydrolysis rate of the titanium ions. An isopropanol (IP) solution was employed as the reaction medium. The TiO2 nanoparticles were characterized by powder X-ray diffraction analysis (XRD), Raman spectroscopy and transmission electron microscopy (TEM). By changing the synthesis parameters it was possible to control nanoparticle size and avoid the coalescence process. A dependence of the Raman wavenumber on the nanocrystal sizes was determined, which is quite useful for a quick check of the size of TiO2 nanocrystals. |
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Phonon confinement model to measure the average sizes of anatase nanoparticles synthesized by a solvothermal method using H2O2AnataseH2O2NanoparticlesRaman spectroscopySolvothermal methodIn this work, crystalline titanium dioxide (TiO2) nanoparticles with variable average crystallite sizes (e.g., 8 nm) and surface areas (e.g., 192 m² g-1) were synthesized in pure anatase phase using H2O2 to reduce the hydrolysis rate of the titanium ions. An isopropanol (IP) solution was employed as the reaction medium. The TiO2 nanoparticles were characterized by powder X-ray diffraction analysis (XRD), Raman spectroscopy and transmission electron microscopy (TEM). By changing the synthesis parameters it was possible to control nanoparticle size and avoid the coalescence process. A dependence of the Raman wavenumber on the nanocrystal sizes was determined, which is quite useful for a quick check of the size of TiO2 nanocrystals.Neste trabalho, nanopartículas de dióxido de titânio (TiO2) cristalino, com um tamanho de cristalito médio (e.g., 8 nm) e área de superfície (e.g., 192 m² g-1) variáveis, foram sintetizadas em fase anatase pura, utilizando H2O2 como agente de redução da taxa de hidrólise dos íons de titânio, em solução de isopropanol (IP) como meio de reação. As nanopartículas de TiO2 foram caracterizadas por meio das técnicas de difratometria de raios X de pó (XRD), espectroscopia Raman e microscopia eletrônica de transmissão (TEM). A alteração dos parâmetros de síntese permitiu o controle do tamanho das nanopartículas e evitou o processo de coalescência. Foi determinada uma dependência entre o número de onda Raman e o tamanho dos nanocristais, o que é bastante útil para uma rápida verificação do tamanho de nanocristais de TiO2.Universidade Federal do Piauí Centro de Ciências da Natureza Departamento de Química Departamento de Física LIMAVUniversidade Federal de São Carlos Departamento de Química LIECUniversidade Estadual Paulista Instituto de Química Departamento de Físico-QuímicaUniversidade Estadual Paulista Instituto de Química Departamento de Físico-QuímicaSociedade Brasileira de QuímicaUniversidade Federal do Piauí (UFPI)Universidade Federal de São Carlos (UFSCar)Universidade Estadual Paulista (Unesp)Viana, Bartolomeu C.Gonçalves, Juliana SousaSantos, Valdemir DosSantos, Maria Rita De M. C.Longo, Elson [UNESP]Santos, Francisco E. P.Matos, José Milton Elias De2014-10-01T13:08:46Z2014-10-01T13:08:46Z2013-06-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1057-1063application/pdfhttp://dx.doi.org/10.5935/0103-5053.20130136Journal of the Brazilian Chemical Society. Sociedade Brasileira de Química, v. 24, n. 6, p. 1057-1063, 2013.0103-50531678-4790http://hdl.handle.net/11449/13235110.5935/0103-5053.20130136S0103-505320130006000222-s2.0-84880307027S0103-50532013000600022.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of the Brazilian Chemical Society1.4440,3570,357info:eu-repo/semantics/openAccess2024-01-06T06:22:58Zoai:repositorio.unesp.br:11449/132351Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-01-06T06:22:58Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Phonon confinement model to measure the average sizes of anatase nanoparticles synthesized by a solvothermal method using H2O2 |
title |
Phonon confinement model to measure the average sizes of anatase nanoparticles synthesized by a solvothermal method using H2O2 |
spellingShingle |
Phonon confinement model to measure the average sizes of anatase nanoparticles synthesized by a solvothermal method using H2O2 Viana, Bartolomeu C. Anatase H2O2 Nanoparticles Raman spectroscopy Solvothermal method |
title_short |
Phonon confinement model to measure the average sizes of anatase nanoparticles synthesized by a solvothermal method using H2O2 |
title_full |
Phonon confinement model to measure the average sizes of anatase nanoparticles synthesized by a solvothermal method using H2O2 |
title_fullStr |
Phonon confinement model to measure the average sizes of anatase nanoparticles synthesized by a solvothermal method using H2O2 |
title_full_unstemmed |
Phonon confinement model to measure the average sizes of anatase nanoparticles synthesized by a solvothermal method using H2O2 |
title_sort |
Phonon confinement model to measure the average sizes of anatase nanoparticles synthesized by a solvothermal method using H2O2 |
author |
Viana, Bartolomeu C. |
author_facet |
Viana, Bartolomeu C. Gonçalves, Juliana Sousa Santos, Valdemir Dos Santos, Maria Rita De M. C. Longo, Elson [UNESP] Santos, Francisco E. P. Matos, José Milton Elias De |
author_role |
author |
author2 |
Gonçalves, Juliana Sousa Santos, Valdemir Dos Santos, Maria Rita De M. C. Longo, Elson [UNESP] Santos, Francisco E. P. Matos, José Milton Elias De |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal do Piauí (UFPI) Universidade Federal de São Carlos (UFSCar) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Viana, Bartolomeu C. Gonçalves, Juliana Sousa Santos, Valdemir Dos Santos, Maria Rita De M. C. Longo, Elson [UNESP] Santos, Francisco E. P. Matos, José Milton Elias De |
dc.subject.por.fl_str_mv |
Anatase H2O2 Nanoparticles Raman spectroscopy Solvothermal method |
topic |
Anatase H2O2 Nanoparticles Raman spectroscopy Solvothermal method |
description |
In this work, crystalline titanium dioxide (TiO2) nanoparticles with variable average crystallite sizes (e.g., 8 nm) and surface areas (e.g., 192 m² g-1) were synthesized in pure anatase phase using H2O2 to reduce the hydrolysis rate of the titanium ions. An isopropanol (IP) solution was employed as the reaction medium. The TiO2 nanoparticles were characterized by powder X-ray diffraction analysis (XRD), Raman spectroscopy and transmission electron microscopy (TEM). By changing the synthesis parameters it was possible to control nanoparticle size and avoid the coalescence process. A dependence of the Raman wavenumber on the nanocrystal sizes was determined, which is quite useful for a quick check of the size of TiO2 nanocrystals. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-06-01 2014-10-01T13:08:46Z 2014-10-01T13:08:46Z |
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/10.5935/0103-5053.20130136 Journal of the Brazilian Chemical Society. Sociedade Brasileira de Química, v. 24, n. 6, p. 1057-1063, 2013. 0103-5053 1678-4790 http://hdl.handle.net/11449/132351 10.5935/0103-5053.20130136 S0103-50532013000600022 2-s2.0-84880307027 S0103-50532013000600022.pdf |
url |
http://dx.doi.org/10.5935/0103-5053.20130136 http://hdl.handle.net/11449/132351 |
identifier_str_mv |
Journal of the Brazilian Chemical Society. Sociedade Brasileira de Química, v. 24, n. 6, p. 1057-1063, 2013. 0103-5053 1678-4790 10.5935/0103-5053.20130136 S0103-50532013000600022 2-s2.0-84880307027 S0103-50532013000600022.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of the Brazilian Chemical Society 1.444 0,357 0,357 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1057-1063 application/pdf |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
SciELO 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_ |
1799965530284621824 |