Química Nova | |
Modified synthetic niobia as catalyst in the oxidation of organic dye: utilization of H2O2 and atmospheric O2 as oxidants | |
Magriotis, Zuy M.1  Silva, Adilson C.1  Universidade Federal de Lavras, Lavras, Brasil1  Carvalho, Kele T. G.1  Gonçalves, Maraisa1  Oliveira, Luiz C. A.1  | |
关键词: niobia; ESI-MS; oxidation process.; | |
DOI : 10.1590/S0100-40422009000600002 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 摘 要 】
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.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912050594579ZK.pdf | 588KB | download |