Non-porous Iron Titanate Thin Films Doped with Nitrogen: Optical, Structural, and Photocatalytic Properties

The synthesized undoped and nitrogen doped iron titanate films treated at 450 and 500 °C were crystallized forming pseudobrookite and landauite phase as shown by XRD patterns. The presence of urea in the synthesis procedure promoted the crystallization rate. XPS data indicated that iron ions existed...

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Bibliographic Details
Published in:Nanoscale research letters 2017-12, Vol.12 (1), p.249-249, Article 249
Main Authors: Linnik, O., Chorna, N., Smirnova, N.
Format: Article
Language:English
Subjects:
Aging
Catalytic activity
Chemical synthesis
Chemistry and Materials Science
Coordination compounds
Crystallization
Ecological photocatalysis
Electromagnetic absorption
Energy gap
Iron
Landauite
Materials Science
Molecular Medicine
Nano Express
Nanochemistry
Nanoscale Science and Technology
Nanotechnology
Nanotechnology and Microengineering
Nanotechnology and Nanomaterials 2016
Nitrogen
Nitrogen-doped iron titanate films
Optical and structural properties
Optical properties
Photocatalysis
Pseudobrookite
Thin films
Ultraviolet radiation
Urea
XPS
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Summary:The synthesized undoped and nitrogen doped iron titanate films treated at 450 and 500 °C were crystallized forming pseudobrookite and landauite phase as shown by XRD patterns. The presence of urea in the synthesis procedure promoted the crystallization rate. XPS data indicated that iron ions existed in divalent and trivalent forms, and their ratio was changed for nitrogen-doped sample. The formation of the complexes between iron and urea during sol aging with the following reduction of Fe 3+ to Fe 2+ within calcination can be a reason not only for accumulation of iron onto the surface as shown by EDS but also for twice increase of divalent iron as registered by XPS. The iron titanate films extended the visible light absorption. Two band gap energy values for all iron-contained films were calculated. The photocatalytic response of all iron titanate films treated at 450 °C compared to pure titania films was spectacularly enhanced under UV and visible light. The slight enhance in photocatalytic activity of nitrogen-doped iron titanate films can be explained by the interstitial nitrogen incorporation rather than substitutional.
ISSN:1931-7573
1556-276X
DOI:10.1186/s11671-017-2027-7