Synthesis and catalytic properties on oxidation reaction of goethite containing niobium

Quimica nova

Guarieiro, Aline L. N.¹  Gonçalves, Maraísa¹  Oliveira, Luiz C. A.¹  Oliveira, Diana Q. L.¹  Pereira, Márcio C.² 

[1]Universidade Federal de Lavras, Lavras, Brasil

[2]Universidade Federal de Minas Gerais, Belo Horizonte, Brasil

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 andcharacterized by Mössbauer spectroscopy, XRD, SEM and BET surface areameasurements. Mössbauer and XRD analyses suggested that Nb replaces Fe3+in the structure with duplet formation. The insertion of Nb into the goethitestructure caused a significant increase in the BET surface area of the material.The prepared a-Fe1-xNbxOOH was investigated for the H2O2 decomposition to O2and for the Fenton reaction to oxidize the dye methylene blue. It was observedthat the introduction of Nb in to goethite produced a strong increase in theactivity of oxidation of the dye contaminant by H2O2.

【 授权许可】

CC BY