Synthesis and catalytic properties on oxidation reaction of goethite containing niobium.

被引：30
作者：
Oliveira, Luiz C. A.
Goncalves, Maraisa
Oliveira, Diana Q. L.
Guarieiro, Aline L. N.
Pereira, Marcio C.
机构：
[1] Univ Fed Lavras, Dept Quim, BR-37200000 Lavras, MG, Brazil
[2] Univ Fed Minas Gerais, Inst Ciencias Exatas, Dept Quim, BR-31270901 Belo Horizonte, MG, Brazil
来源：
QUIMICA NOVA | 2007年 / 30卷 / 04期
关键词：
goethite; niobium; oxidation;
D O I：
10.1590/S0100-40422007000400031
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Nb-substituted goethites have been prepared and characterized by Mossbauer spectroscopy, XRD, SEM and BET surface area measurements. Mossbauer 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 alpha-Fe1-xNbxOOH was investigated for the H2O2 decomposition to O-2 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.
引用
收藏
页码：925 / 929
页数：5
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