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Title: Enhancing the photocatalytic activity of nanocrystalline TiO{sub 2} by co-doping with fluorine and yttrium

Highlights: • (F, Y)-codoped TiO{sub 2} nanoparticles were prepared by a simple sol–gel method. • The highest photocatalytic activity (15 times of that over the pure TiO{sub 2}) was exhibited in the codoped TiO{sub 2} with 0.05% Y doping level. • The Y doping induced oxygen vancancies played a duel role on the photocatalyic activity of the codoped TiO{sub 2}. • The photocatalytic reactive oxygen species are critical to the photocatalytic degradation processes. - Abstract: Fluorine and yttrium codoped TiO{sub 2} nanoparticles were prepared using a simple sol–gel method. The products were characterized with various spectroscopic and analytical techniques to determine their structural, morphological, optical absorption and photocatalytic properties. The results reveal that neither F nor Y doping causes obvious absorption edge shift in TiO{sub 2}. Photoluminescence (PL) emission spectra present that the PL signal is enhanced, suggesting a decrease of photo-generated charge carrier separation efficiency, after the F or Y doping. The synergistic action by the F and Y doping leads to the highest photocatalytic activity for the degradation of methylene blue solution in the 0.05% (F, Y)-codoped sample (15 times of that over the pure TiO{sub 2}). With the increase of Y doping level, the photocatalytic performance inmore » the codoped samples increases firstly and then decreases. The photocatalytic activity variations after the F and Y doping were interpreted by the formation of photocatalytic reactive oxygen species induced by the dopings.« less
Authors:
 [1] ;  [2] ; ; ;  [3] ;  [1] ;  [2]
  1. Key Laboratory of Photovoltaic Materials of Henan Province, Henan University, Kaifeng 475001 (China)
  2. (China)
  3. Institute of Microsystemic Physics and School of Physics and Electronics, Henan University, Kaifeng 475001 (China)
Publication Date:
OSTI Identifier:
22348667
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 55; Other Information: Copyright (c) 2014 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; CHARGE CARRIERS; CRYSTALS; EFFICIENCY; EMISSION SPECTRA; FLUORINE; METHYLENE BLUE; NANOPARTICLES; NANOSTRUCTURES; OXYGEN; PHOTOCATALYSIS; PHOTOLUMINESCENCE; SEMICONDUCTOR MATERIALS; SOL-GEL PROCESS; SOLUTIONS; TITANIUM OXIDES; X-RAY DIFFRACTION; YTTRIUM