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Catalytic properties of goethite prepared in the presence of Nb on oxidation reactions in water: Computational and experimental studies

Paper ID Volume ID Publish Year Pages File Format Full-Text
48148 46495 2008 8 PDF Available
Title
Catalytic properties of goethite prepared in the presence of Nb on oxidation reactions in water: Computational and experimental studies
Abstract

Nb-substituted goethites have been prepared and characterized by Mössbauer spectroscopy, XRD, FTIR and BET surface area measurements. The doublet formation in Mössbauer spectra and the decreasing of the crystallinity shown in XRD analyses indicated that the Fe domain size is small, which may be the result of either Fe3+ substitution for Nb5+ in the goethite structure or simply the formation of small particle-size goethite when Nb is present. FTIR analyses showed shifts and broadening of the bands as result of the incorporation of Nb5+ ions into the α-FeOOH structure. The insertion of Nb in the goethite structure caused a significant increase in the BET surface area of the material. The prepared materials were investigated for the H2O2 decomposition and the Fenton reaction in the oxidation of methylene blue dye. It was observed that the introduction of Nb during the synthesis of goethite produced a strong increase in the activity for the dye contaminant oxidation by H2O2. Theoretical quantum DFT calculations were carried out in order to understand the degradation mechanism for methylene blue with goethites.

Keywords
Goethite; Niobium; DFT; Fenton reaction
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Catalytic properties of goethite prepared in the presence of Nb on oxidation reactions in water: Computational and experimental studies
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 83, Issues 3–4, 23 September 2008, Pages 169–176
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
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