The effect of milling atmospheres on photocatalytic property of Fe-doped TiO2 synthesized by mechanical alloying

The Fe-doped TiO2 powders were, respectively, milled in argon, air and oxygen atmospheres, the oxygen partial pressure (PO2) of which increase in turn. The Fe concentration was found to be 4.468, 4.227 and 4.473 at.% for the powders milled in argon, air and oxygen, respectively. The rietveld refined...

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Bibliographic Details
Published in:Journal of alloys and compounds 2009-02, Vol.470 (1-2), p.375-378
Main Authors: Fan, Lin, Dongmei, Jiang, Xueming, Ma
Format: Article
Language:English
Subjects:
Chemistry
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Materials science
Materials synthesis
materials processing
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Physics
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Summary:The Fe-doped TiO2 powders were, respectively, milled in argon, air and oxygen atmospheres, the oxygen partial pressure (PO2) of which increase in turn. The Fe concentration was found to be 4.468, 4.227 and 4.473 at.% for the powders milled in argon, air and oxygen, respectively. The rietveld refined of X-ray diffraction (XRD) revealed that the milled samples were pure rutile structure. The Raman spectra confirmed the results of XRD. Furthermore, it indicated that the amount of oxygen vacancies increased with the decrease of PO2. Fe dissolved in TiO2 was found to take Fe2+/Fe3+ ionic valences. The absorption edge was shifted to visible light range by the doping of Fe. And visible light photocatalytic activity enhanced with the decrease of PO2 due to the increase of oxygen vacancies.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2008.02.067