Nióbia sintética modificada como catalisador na oxidação de corante orgânico: utilização de H2O2 e O2 atmosférico como oxidantes Modified synthetic niobia as catalyst in the oxidation of organic dye: utilization of H2O2 and atmospheric O2 as oxidants
<abstract language="eng">In this work synthetic niobia was used to promote the oxidation of methylene blue dye in aqueous medium. The niobia was characterized by N2 adsorption/desorption, XRD and TG measurements. The presence of reactive species on the niobia surface strongly increas...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2009-01-01
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| Series: | Química Nova |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422009000600002 |
| _version_ | 1819173273834881024 |
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| author | Kele T. G. Carvalho Adilson C. Silva Luiz C. A. Oliveira Maraisa Gonçalves Zuy M. Magriotis |
| author_facet | Kele T. G. Carvalho Adilson C. Silva Luiz C. A. Oliveira Maraisa Gonçalves Zuy M. Magriotis |
| author_sort | Kele T. G. Carvalho |
| collection | DOAJ |
| description | <abstract language="eng">In this work synthetic niobia was used to promote the oxidation of methylene blue dye in aqueous medium. The niobia was characterized by N2 adsorption/desorption, XRD and TG measurements. The presence of reactive species on the niobia surface strongly increased the oxidation rate of the methylene blue dye. The reaction mechanism was studied by ESI-MS suggesting that the oxidation of the organic dye involve oxidizing species generated mainly after previous treatment with H2O2. It can be observed that the catalyst is a good material in the activation of gas (atmospheric oxygen) or liquid (hydrogen peroxide) oxidant agent with a total discoloration of the dye solution after only 1 h of reaction. |
| first_indexed | 2024-12-22T20:20:28Z |
| format | Article |
| id | doaj.art-6bd8bfec268b4e348239f760f80f5950 |
| institution | Directory Open Access Journal |
| issn | 0100-4042 1678-7064 |
| language | English |
| last_indexed | 2024-12-22T20:20:28Z |
| publishDate | 2009-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-6bd8bfec268b4e348239f760f80f59502022-12-21T18:13:51ZengSociedade Brasileira de QuímicaQuímica Nova0100-40421678-70642009-01-013261373137710.1590/S0100-40422009000600002Nióbia sintética modificada como catalisador na oxidação de corante orgânico: utilização de H2O2 e O2 atmosférico como oxidantes Modified synthetic niobia as catalyst in the oxidation of organic dye: utilization of H2O2 and atmospheric O2 as oxidantsKele T. G. CarvalhoAdilson C. SilvaLuiz C. A. OliveiraMaraisa GonçalvesZuy M. Magriotis<abstract language="eng">In this work synthetic niobia was used to promote the oxidation of methylene blue dye in aqueous medium. The niobia was characterized by N2 adsorption/desorption, XRD and TG measurements. The presence of reactive species on the niobia surface strongly increased the oxidation rate of the methylene blue dye. The reaction mechanism was studied by ESI-MS suggesting that the oxidation of the organic dye involve oxidizing species generated mainly after previous treatment with H2O2. It can be observed that the catalyst is a good material in the activation of gas (atmospheric oxygen) or liquid (hydrogen peroxide) oxidant agent with a total discoloration of the dye solution after only 1 h of reaction.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422009000600002niobiaESI-MSoxidation process |
| spellingShingle | Kele T. G. Carvalho Adilson C. Silva Luiz C. A. Oliveira Maraisa Gonçalves Zuy M. Magriotis Nióbia sintética modificada como catalisador na oxidação de corante orgânico: utilização de H2O2 e O2 atmosférico como oxidantes Modified synthetic niobia as catalyst in the oxidation of organic dye: utilization of H2O2 and atmospheric O2 as oxidants Química Nova niobia ESI-MS oxidation process |
| title | Nióbia sintética modificada como catalisador na oxidação de corante orgânico: utilização de H2O2 e O2 atmosférico como oxidantes Modified synthetic niobia as catalyst in the oxidation of organic dye: utilization of H2O2 and atmospheric O2 as oxidants |
| title_full | Nióbia sintética modificada como catalisador na oxidação de corante orgânico: utilização de H2O2 e O2 atmosférico como oxidantes Modified synthetic niobia as catalyst in the oxidation of organic dye: utilization of H2O2 and atmospheric O2 as oxidants |
| title_fullStr | Nióbia sintética modificada como catalisador na oxidação de corante orgânico: utilização de H2O2 e O2 atmosférico como oxidantes Modified synthetic niobia as catalyst in the oxidation of organic dye: utilization of H2O2 and atmospheric O2 as oxidants |
| title_full_unstemmed | Nióbia sintética modificada como catalisador na oxidação de corante orgânico: utilização de H2O2 e O2 atmosférico como oxidantes Modified synthetic niobia as catalyst in the oxidation of organic dye: utilization of H2O2 and atmospheric O2 as oxidants |
| title_short | Nióbia sintética modificada como catalisador na oxidação de corante orgânico: utilização de H2O2 e O2 atmosférico como oxidantes Modified synthetic niobia as catalyst in the oxidation of organic dye: utilization of H2O2 and atmospheric O2 as oxidants |
| title_sort | niobia sintetica modificada como catalisador na oxidacao de corante organico utilizacao de h2o2 e o2 atmosferico como oxidantes modified synthetic niobia as catalyst in the oxidation of organic dye utilization of h2o2 and atmospheric o2 as oxidants |
| topic | niobia ESI-MS oxidation process |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422009000600002 |
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