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

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 themore » Fe-doped TiO{sub 2} fibers.« less
Authors:
 [1] ;  [1] ;  [2] ; ; ; ; ; ;  [1]
  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)
Publication Date:
OSTI Identifier:
22290485
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal 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)
Country of Publication:
United States
Language:
English
Subject:
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