Effect of tungsten doping on catalytic properties of niobium oxide

Bibliographic Details
Main Author: Cardoso,Franciane P.
Publication Date: 2012
Other Authors: Nogueira,Andre E., Patrício,Patrícia S. O., Oliveira,Luiz C. A.
Format: Article
Language: eng
Source: Journal of the Brazilian Chemical Society (Online)
Download full: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000400016
Summary: A novel material based on niobia (Nb2O5) was synthesized to oxidize an organic compound in aqueous medium in the presence of H2O2 after chemical modifications. Niobia was modified by doping with tungsten and also treating with H2O2 in order to maximize the oxidative properties of this oxide. The analysis of the products from methylene blue dye oxidation with electrospray ionization mass spectrometry (ESI-MS) showed that the dye was successively oxidized to different intermediate compounds. The successive hydroxylation during this oxidation strongly suggests that highly reactive hydroxyl radicals are generated involving H2O2 on the W-doped niobia grain surface. These results strongly suggest that the H2O2 can regenerate in situ the peroxo group remaining active the system.
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spelling Effect of tungsten doping on catalytic properties of niobium oxideniobiatungstencatalytic oxidationorganic contaminantA novel material based on niobia (Nb2O5) was synthesized to oxidize an organic compound in aqueous medium in the presence of H2O2 after chemical modifications. Niobia was modified by doping with tungsten and also treating with H2O2 in order to maximize the oxidative properties of this oxide. The analysis of the products from methylene blue dye oxidation with electrospray ionization mass spectrometry (ESI-MS) showed that the dye was successively oxidized to different intermediate compounds. The successive hydroxylation during this oxidation strongly suggests that highly reactive hydroxyl radicals are generated involving H2O2 on the W-doped niobia grain surface. These results strongly suggest that the H2O2 can regenerate in situ the peroxo group remaining active the system.Sociedade Brasileira de Química2012-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000400016Journal of the Brazilian Chemical Society v.23 n.4 2012reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532012000400016info:eu-repo/semantics/openAccessCardoso,Franciane P.Nogueira,Andre E.Patrício,Patrícia S. O.Oliveira,Luiz C. A.eng2012-04-27T00:00:00Zoai:scielo:S0103-50532012000400016Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2012-04-27T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Effect of tungsten doping on catalytic properties of niobium oxide
title Effect of tungsten doping on catalytic properties of niobium oxide
spellingShingle Effect of tungsten doping on catalytic properties of niobium oxide
Cardoso,Franciane P.
niobia
tungsten
catalytic oxidation
organic contaminant
title_short Effect of tungsten doping on catalytic properties of niobium oxide
title_full Effect of tungsten doping on catalytic properties of niobium oxide
title_fullStr Effect of tungsten doping on catalytic properties of niobium oxide
title_full_unstemmed Effect of tungsten doping on catalytic properties of niobium oxide
title_sort Effect of tungsten doping on catalytic properties of niobium oxide
author Cardoso,Franciane P.
author_facet Cardoso,Franciane P.
Nogueira,Andre E.
Patrício,Patrícia S. O.
Oliveira,Luiz C. A.
author_role author
author2 Nogueira,Andre E.
Patrício,Patrícia S. O.
Oliveira,Luiz C. A.
author2_role author
author
author
dc.contributor.author.fl_str_mv Cardoso,Franciane P.
Nogueira,Andre E.
Patrício,Patrícia S. O.
Oliveira,Luiz C. A.
dc.subject.por.fl_str_mv niobia
tungsten
catalytic oxidation
organic contaminant
topic niobia
tungsten
catalytic oxidation
organic contaminant
description A novel material based on niobia (Nb2O5) was synthesized to oxidize an organic compound in aqueous medium in the presence of H2O2 after chemical modifications. Niobia was modified by doping with tungsten and also treating with H2O2 in order to maximize the oxidative properties of this oxide. The analysis of the products from methylene blue dye oxidation with electrospray ionization mass spectrometry (ESI-MS) showed that the dye was successively oxidized to different intermediate compounds. The successive hydroxylation during this oxidation strongly suggests that highly reactive hydroxyl radicals are generated involving H2O2 on the W-doped niobia grain surface. These results strongly suggest that the H2O2 can regenerate in situ the peroxo group remaining active the system.
publishDate 2012
dc.date.none.fl_str_mv 2012-04-01
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=S0103-50532012000400016
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000400016
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532012000400016
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.4 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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