Preparation, characterization and electronic structures of Fe-doped TiO{sub 2} nanostructured fibers

Journal Article · Mon Jul 15 00:00:00 EDT 2013 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2013.04.002· OSTI ID:22290485

Liu, X. T. ^[1]; Qin, W. W. ^[2]; Liu, X. S.; Cai, N. N.; Wang, X. Q.; Lin, X. J.; Zhang, G. H.; Xu, D. ^[1]

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1. State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100 (China)
2. School of Mechanical, Shandong Kaiwen College of Science and Technology, Jinan 250200 (China)

Graphical abstract: - Highlights: • Mesoporous Fe-doped TiO{sub 2} fibers were prepared on a large scale by sol–gel method. • Fe-doping greatly enhance the visible-light photocatalytic activity of TiO{sub 2} fibers. • First-principle study the effects of different replaced sites on the absorption edge and band gap. - Abstract: Mesoporous and nanostructured Fe-doped TiO{sub 2} fibers were fabricated on a large scale by sol–gel method combined with the polyorganotitanium as the precursor and ferric nitrate as dopant. The prepared fibers were characterized by XRD, XPS, SEM, TEM, N{sub 2} adsorption–desorption isotherms and UV–vis spectroscopy. The photocatalytic activity was evaluated by photodegradation of methyl orange (MO) aqueous solution under UV and visible-light irradiation. Compared with different types of photocatalysts, the 0.5%Fe-doped TiO{sub 2} fibers exhibit super photocatalytic activity. This is ascribed to the fact that the Fe-doping induces the shift of the absorption edge into the visible-light range with the narrowing of the band gap and reduces the recombination of the photo-generated electrons and holes. Furthermore, first-principle study for their electronic structures was carried out to confirm the effects of different replaced lattice sites on the red shift of the absorption edge and the changes of the band gap of the Fe-doped TiO{sub 2} fibers.

• OSTI ID: 22290485
• Journal Information: Materials Research Bulletin, Vol. 48, Issue 7; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
AQUEOUS SOLUTIONS
DOPED MATERIALS
ELECTRONIC STRUCTURE
FIBERS
METHYL ORANGE
NANOSTRUCTURES
PHOTOCATALYSIS
SEMICONDUCTOR MATERIALS
SOL-GEL PROCESS
TITANIUM OXIDES
X-RAY PHOTOELECTRON SPECTROSCOPY