Modified synthetic niobia as catalyst in the oxidation of organic dye: utilization of H2O2 and atmospheric O2 as oxidants

Quimica nova

Magriotis, Zuy M.¹  Silva, Adilson C.¹  Carvalho, Kele T. G.¹  Gonçalves, Maraisa¹  Oliveira, Luiz C. A.¹ 

[1] Universidade Federal de Lavras, Lavras, Brasil

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 syntheticniobia was used to promote the oxidation of methylene blue dye in aqueous medium.The niobia was characterized by N2 adsorption/desorption, XRD andTG measurements. The presence of reactive species on the niobia surface stronglyincreased the oxidation rate of the methylene blue dye. The reaction mechanismwas studied by ESI-MS suggesting that the oxidation of the organic dye involveoxidizing species generated mainly after previous treatment with H2O2.It can be observed that the catalyst is a good material in the activation ofgas (atmospheric oxygen) or liquid (hydrogen peroxide) oxidant agent with atotal discoloration of the dye solution after only 1 h of reaction.

【 授权许可】

CC BY