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Title: Synthesis and properties of (Yb, N)-TiO{sub 2} photocatalyst for degradation of methylene blue (MB) under visible light irradiation

Highlights: • The (Yb, N)-TiO{sub 2} nanoparticles were prepared and characterized. • The spectrum absorption region of (Yb, N)-TiO{sub 2} is red-shifted to visible light. • The recombination of the photo-generated electron–hole pairs of (Yb, N)-TiO{sub 2} is suppressed. • The photocatalytic activity of (Yb, N)-TiO{sub 2} is more higher than that of TiO{sub 2}-P25, N-TiO{sub 2} and the Yb-TiO{sub 2}. - Abstract: (Yb, N)-TiO{sub 2} photocatalyst has been synthesized by sol–gel method combined with microwave chemical synthesis. Also, the efficiency of the (Yb, N)-TiO{sub 2} as a photocatalyst for the degradation of methylene blue (MB) using visible light irradiation has been evaluated. The prepared samples were characterized by XRD, TEM, XPS, UV–vis-DRS and PL. The results show that the (Yb, N)-TiO{sub 2} photocatalyst has the anatase TiO{sub 2} crystalline phase. The TEM micrograph demonstrated that the average particle size of the sample was about 12 nm. The band-gap energy absorption edge shifted to longer wavelength as compared to commercial TiO{sub 2}-P25, N-TiO{sub 2} and the Yb-TiO{sub 2} prepared by our group. Results of degradation revealed that the (Yb, N)-TiO{sub 2} has shown much more higher photocatalytic activity than that of the TiO{sub 2}-P25, the N-TiO{sub 2} and the Yb-TiO{submore » 2} under the visible light.« less
Authors:
 [1] ;  [2] ;  [1] ;  [2] ;  [1] ;  [2] ;  [1]
  1. Yunnan Key Laboratory of Micro/Nano Materials & Technology, Yunnan University, Kunming 650091 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22475919
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 70; Other Information: Copyright (c) 2015 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:
77 NANOSCIENCE AND NANOTECHNOLOGY; CATALYSTS; DECOMPOSITION; ENERGY ABSORPTION; METHYLENE BLUE; NANOPARTICLES; NITROGEN ADDITIONS; PARTICLE SIZE; PHOTOCATALYSIS; RECOMBINATION; RED SHIFT; SOL-GEL PROCESS; SPECTRA; SYNTHESIS; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY; VISIBLE RADIATION; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY; YTTERBIUM ADDITIONS