Photocatalytic degradation of camphor by suspended and immobilized photocatalysts

Detalhes bibliográficos
Autor(a) principal: Sirtori,Carla
Data de Publicação: 2012
Outros Autores: Freitas,Adriane M. de, Fujiwara,Sérgio Toshio, Peralta-Zamora,Patricio
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000800020
Resumo: In this work, the degradation of aqueous solution of camphor by heterogeneous photocatalysis was study using suspended and supported TiO2 and ZnO. The supported catalysts (TiO2/borosilicate reaching ring, TiO2/calcium alginate and ZnO/calcium alginate) were characterized by scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM/EDX), X-ray diffractometry (XRD), energy dispersive X-ray fluorescence (EDXRF) and Raman spectroscopy, techniques that permitted to confirm the porosity of the material as well as the characteristic crystalline forms (anatase and wurtzite). The degradation efficiency of the supported photocatalysts was compared with the performance of free TiO2 and ZnO, observing comparable results between conventional Degussa P25 TiO2 and TiO2 immobilized in glass-rings. On the other hand, the use of calcium alginate beads leads to lower degradation efficiency probably due to the significant area reduction observed in immobilized systems.
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spelling Photocatalytic degradation of camphor by suspended and immobilized photocatalystscamphorphotocatalysisimmobilized photocatalystsTiO2ZnOIn this work, the degradation of aqueous solution of camphor by heterogeneous photocatalysis was study using suspended and supported TiO2 and ZnO. The supported catalysts (TiO2/borosilicate reaching ring, TiO2/calcium alginate and ZnO/calcium alginate) were characterized by scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM/EDX), X-ray diffractometry (XRD), energy dispersive X-ray fluorescence (EDXRF) and Raman spectroscopy, techniques that permitted to confirm the porosity of the material as well as the characteristic crystalline forms (anatase and wurtzite). The degradation efficiency of the supported photocatalysts was compared with the performance of free TiO2 and ZnO, observing comparable results between conventional Degussa P25 TiO2 and TiO2 immobilized in glass-rings. On the other hand, the use of calcium alginate beads leads to lower degradation efficiency probably due to the significant area reduction observed in immobilized systems.Sociedade Brasileira de Química2012-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000800020Journal of the Brazilian Chemical Society v.23 n.8 2012reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532012005000020info:eu-repo/semantics/openAccessSirtori,CarlaFreitas,Adriane M. deFujiwara,Sérgio ToshioPeralta-Zamora,Patricioeng2012-09-14T00:00:00Zoai:scielo:S0103-50532012000800020Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2012-09-14T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Photocatalytic degradation of camphor by suspended and immobilized photocatalysts
title Photocatalytic degradation of camphor by suspended and immobilized photocatalysts
spellingShingle Photocatalytic degradation of camphor by suspended and immobilized photocatalysts
Sirtori,Carla
camphor
photocatalysis
immobilized photocatalysts
TiO2
ZnO
title_short Photocatalytic degradation of camphor by suspended and immobilized photocatalysts
title_full Photocatalytic degradation of camphor by suspended and immobilized photocatalysts
title_fullStr Photocatalytic degradation of camphor by suspended and immobilized photocatalysts
title_full_unstemmed Photocatalytic degradation of camphor by suspended and immobilized photocatalysts
title_sort Photocatalytic degradation of camphor by suspended and immobilized photocatalysts
author Sirtori,Carla
author_facet Sirtori,Carla
Freitas,Adriane M. de
Fujiwara,Sérgio Toshio
Peralta-Zamora,Patricio
author_role author
author2 Freitas,Adriane M. de
Fujiwara,Sérgio Toshio
Peralta-Zamora,Patricio
author2_role author
author
author
dc.contributor.author.fl_str_mv Sirtori,Carla
Freitas,Adriane M. de
Fujiwara,Sérgio Toshio
Peralta-Zamora,Patricio
dc.subject.por.fl_str_mv camphor
photocatalysis
immobilized photocatalysts
TiO2
ZnO
topic camphor
photocatalysis
immobilized photocatalysts
TiO2
ZnO
description In this work, the degradation of aqueous solution of camphor by heterogeneous photocatalysis was study using suspended and supported TiO2 and ZnO. The supported catalysts (TiO2/borosilicate reaching ring, TiO2/calcium alginate and ZnO/calcium alginate) were characterized by scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM/EDX), X-ray diffractometry (XRD), energy dispersive X-ray fluorescence (EDXRF) and Raman spectroscopy, techniques that permitted to confirm the porosity of the material as well as the characteristic crystalline forms (anatase and wurtzite). The degradation efficiency of the supported photocatalysts was compared with the performance of free TiO2 and ZnO, observing comparable results between conventional Degussa P25 TiO2 and TiO2 immobilized in glass-rings. On the other hand, the use of calcium alginate beads leads to lower degradation efficiency probably due to the significant area reduction observed in immobilized systems.
publishDate 2012
dc.date.none.fl_str_mv 2012-08-01
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=S0103-50532012000800020
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000800020
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532012005000020
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 Journal of the Brazilian Chemical Society v.23 n.8 2012
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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