Synthesis and catalytic properties on oxidation reaction of goethite containing niobium

Química Nova

Pereira, Márcio C.¹  Guarieiro, Aline L. N.¹  Universidade Federal de Lavras, Lavras, Brasil¹  Gonçalves, Maraísa¹  Universidade Federal de Minas Gerais, Belo Horizonte, Brasil¹  Oliveira, Luiz C. A.¹  Oliveira, Diana Q. L.¹ 

关键词: goethite;    niobium;    oxidation.;   

DOI  :  10.1590/S0100-40422007000400031

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Nb-substituted goethites have been prepared and characterized by Mössbauer spectroscopy, XRD, SEM and BET surface area measurements. Mössbauer and XRD analyses suggested that Nb replaces Fe3+ in the structure with duplet formation. The insertion of Nb into the goethite structure caused a significant increase in the BET surface area of the material. The prepared a-Fe1-xNbxOOH was investigated for the H2O2 decomposition to O2 and for the Fenton reaction to oxidize the dye methylene blue. It was observed that the introduction of Nb in to goethite produced a strong increase in the activity of oxidation of the dye contaminant by H2O2.

【 授权许可】

Unknown