Electrochemical Fabrication and Properties of Highly Ordered Fe-Doped TiO2 Nanotubes

被引：27

作者：

Kyeremateng, Nana A. ^{[1
,2
]}

Hornebecq, Virginie ^{[2
]}

Martinez, Herve ^{[3
]}

Knauth, Philippe ^{[2
]}

Djenizian, Thierry ^{[1
]}

机构：

[1] Aix Marseille Univ, CNRS, LP3 UMR 7341, F-13288 Marseille, France

[2] Aix Marseille Univ, CNRS, MADIREL UMR 7246, F-13397 Marseille, France

[3] Univ Pau & Pays de lAdour, Lab IPREM UMR 5254, F-64053 Pau 9, France

来源：

CHEMPHYSCHEM | 2012年 / 13卷 / 16期

关键词：

anodization; band gaps; doping; Mott-Schottky equation; titania nanotubes; ELECTRONIC-STRUCTURE; CORE-LEVEL; OXIDE; TITANIUM; IRON; FILMS; XPS; ALPHA-FE2O3; TRANSITION; ARRAYS;

D O I：

10.1002/cphc.201200406

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Highly-ordered Fe-doped TiO2 nanotubes (TiO(2)nts) were fabricated by anodization of co-sputtered TiFe thin films in a glycerol electrolyte containing NH4F. The as-sputtered TiFe thin films correspond to a solid solution of Ti and Fe according to X-ray diffraction. The Fe-doped TiO(2)nts were studied in terms of composition, morphology and structure. The characterization included scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, UV/Vis spectroscopy, X-ray photoelectron spectroscopy and MottSchottky analysis. As a result of the Fe doping, an indirect bandgap of 3.0 eV was estimated using Taucs plot, and this substantial red-shift extends its photoresponse to visible light. From the MottSchottky analysis, the flat-band potential (E-fb) and the charge carrier concentration (N-D) were determined to be -0.95 V vs Ag/AgCl and 5.0 x10(19) cm(-3) respectively for the Fe-doped TiO(2)nts, whilst for the undoped TiO(2)nts, E-fb of -0.85 V vs Ag/AgCl and N-D of 6.5x10(19) cm(-3) were obtained.

引用

页码：3707 / 3713

页数：7

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