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http://repositorio.ufla.br/jspui/handle/1/37123| Title: | Nióbia sintética modificada como catalisador na oxidação de corante orgânico: utilização de H2O2 e O2 atmosférico como oxidantes |
| Other Titles: | Modified synthetic niobia as catalyst in the oxidation of organic dye: utilization of H2O2 and atmospheric O2 as oxidants |
| Keywords: | Niobia ESI-MS Oxidation process |
| Issue Date: | 2009 |
| Publisher: | Sociedade Brasileira de Química (SBQ) |
| Citation: | CARVALHO, K. T. G. et al. Nióbia sintética modificada como catalisador na oxidação de corante orgânico: utilização de H2O2 e O2 atmosférico como oxidantes. Química Nova, São Paulo, v. 32, n. 6, p. 1373-1377, 2009. DOI: 10.1590/S0100-40422009000600002. |
| Abstract: | 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. |
| URI: | http://repositorio.ufla.br/jspui/handle/1/37123 |
| Appears in Collections: | DEG - Artigos publicados em periódicos |
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| ARTIGO_Nióbia sintética modificada como catalisador na oxidação de corante orgânico utilização de H2O2 e O2 atmosférico como oxidantes.pdf | 588,57 kB | Adobe PDF | View/Open |
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