Nanocompósitos semicondutores ZnO/TiO2: testes fotocatalíticos

Detalhes bibliográficos
Autor(a) principal: Silva,Shirley Santana
Data de Publicação: 2010
Outros Autores: Magalhães,Fabiano, Sansiviero,Maria Terezinha C.
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000100016
Resumo: Titanium dioxide is an efficient photocatalist, being possible to improve its efficiency with better charge separation which occurs when it is coupled with other semiconductors. Nanometric particles of ZnO were used to impregnate TiO2 P25 in order to optimize its photocatalytic properties. ZnO/TiO2 composites were obtained at different proportions and were characterized by X-ray diffraction (XRD), micro-Raman and diffuse reflectance spectroscopies, measurement of surface area (BET) and scanning electron microscopy (SEM). Raman spectroscopy data revealed a change on the TiO2 surface due the presence of ZnO which was observed by an enlargement of TiO2 peaks and a change on the relation rate between anatase and rutile phases of the composites. The photodegradation of azo-dye Drimaren red revealed better efficiency for ZnO/TiO2 3% nanocomposite and for ZnO pure.
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spelling Nanocompósitos semicondutores ZnO/TiO2: testes fotocatalíticossemiconductor nanocompositesphotocatalysisRaman spectroscopyTitanium dioxide is an efficient photocatalist, being possible to improve its efficiency with better charge separation which occurs when it is coupled with other semiconductors. Nanometric particles of ZnO were used to impregnate TiO2 P25 in order to optimize its photocatalytic properties. ZnO/TiO2 composites were obtained at different proportions and were characterized by X-ray diffraction (XRD), micro-Raman and diffuse reflectance spectroscopies, measurement of surface area (BET) and scanning electron microscopy (SEM). Raman spectroscopy data revealed a change on the TiO2 surface due the presence of ZnO which was observed by an enlargement of TiO2 peaks and a change on the relation rate between anatase and rutile phases of the composites. The photodegradation of azo-dye Drimaren red revealed better efficiency for ZnO/TiO2 3% nanocomposite and for ZnO pure.Sociedade Brasileira de Química2010-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000100016Química Nova v.33 n.1 2010reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422010000100016info:eu-repo/semantics/openAccessSilva,Shirley SantanaMagalhães,FabianoSansiviero,Maria Terezinha C.por2010-02-05T00:00:00Zoai:scielo:S0100-40422010000100016Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2010-02-05T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Nanocompósitos semicondutores ZnO/TiO2: testes fotocatalíticos
title Nanocompósitos semicondutores ZnO/TiO2: testes fotocatalíticos
spellingShingle Nanocompósitos semicondutores ZnO/TiO2: testes fotocatalíticos
Silva,Shirley Santana
semiconductor nanocomposites
photocatalysis
Raman spectroscopy
title_short Nanocompósitos semicondutores ZnO/TiO2: testes fotocatalíticos
title_full Nanocompósitos semicondutores ZnO/TiO2: testes fotocatalíticos
title_fullStr Nanocompósitos semicondutores ZnO/TiO2: testes fotocatalíticos
title_full_unstemmed Nanocompósitos semicondutores ZnO/TiO2: testes fotocatalíticos
title_sort Nanocompósitos semicondutores ZnO/TiO2: testes fotocatalíticos
author Silva,Shirley Santana
author_facet Silva,Shirley Santana
Magalhães,Fabiano
Sansiviero,Maria Terezinha C.
author_role author
author2 Magalhães,Fabiano
Sansiviero,Maria Terezinha C.
author2_role author
author
dc.contributor.author.fl_str_mv Silva,Shirley Santana
Magalhães,Fabiano
Sansiviero,Maria Terezinha C.
dc.subject.por.fl_str_mv semiconductor nanocomposites
photocatalysis
Raman spectroscopy
topic semiconductor nanocomposites
photocatalysis
Raman spectroscopy
description Titanium dioxide is an efficient photocatalist, being possible to improve its efficiency with better charge separation which occurs when it is coupled with other semiconductors. Nanometric particles of ZnO were used to impregnate TiO2 P25 in order to optimize its photocatalytic properties. ZnO/TiO2 composites were obtained at different proportions and were characterized by X-ray diffraction (XRD), micro-Raman and diffuse reflectance spectroscopies, measurement of surface area (BET) and scanning electron microscopy (SEM). Raman spectroscopy data revealed a change on the TiO2 surface due the presence of ZnO which was observed by an enlargement of TiO2 peaks and a change on the relation rate between anatase and rutile phases of the composites. The photodegradation of azo-dye Drimaren red revealed better efficiency for ZnO/TiO2 3% nanocomposite and for ZnO pure.
publishDate 2010
dc.date.none.fl_str_mv 2010-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000100016
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000100016
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40422010000100016
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
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 Química Nova v.33 n.1 2010
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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