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Title: Study of new states in visible light active W, N co-doped TiO{sub 2} photo catalyst

Abstract

Highlights: ► Visible light efficient W, N co-doped TiO{sub 2} photo catalysts are prepared by sol–gel. ► Oxygen vacancies are detected in the form of new linkages as N-Ti-O, N-W-O, Ti-O-N and W-O-N. ► W, N co-doped titania has new energy states which narrows the band gap effectively. ► Oxygen vacancies are proved to be the cause for high photo catalytic activity. ► W and N co-doping plays the major role to make the composite thermally stable. -- Abstract: The visible light efficient W, N co-doped TiO{sub 2} photo catalysts are prepared by sol–gel method. New linkages of N, W and O are formed as N-Ti-O, N-W-O, Ti-O-N and W-O-N. Electron paramagnetic resonance illustrates the presence of oxygen vacancies in W, N co-doped TiO{sub 2} acting as trapping agencies for electrons to produce active species. X-ray photoelectron spectroscopy confirms the presence of new energy states. New linkages and oxygen vacancies are proved to be the main cause for the improved photo catalytic performances. W, N co-doped TiO{sub 2} has new energy states which narrow the band gap effectively. W, N co-doped TiO{sub 2} is thermally stable and retains its anatase phase up to 900 °C. 4.5% W, N co-doped TiO{submore » 2} showed superior activity for the degradation of Rhodamine B and 2,4-dichlorophenol as compared to pure titania, Degussa P-25, traditional N-doped TiO{sub 2} and pure WO{sub 3}.« less

Authors:
 [1];  [1];  [1]
  1. Key Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237 (China)
Publication Date:
OSTI Identifier:
22215540
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 47; Journal Issue: 11; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CATALYSTS; DOPED MATERIALS; ELECTRON SPIN RESONANCE; OXYGEN; TITANIUM OXIDES; TUNGSTATES; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Sajjad, Ahmed Khan Leghari, Shamaila, Sajjad, E-mail: shalisajjad@yahoo.com, and Zhang, Jinlong. Study of new states in visible light active W, N co-doped TiO{sub 2} photo catalyst. United States: N. p., 2012. Web. doi:10.1016/J.MATERRESBULL.2012.08.032.
Sajjad, Ahmed Khan Leghari, Shamaila, Sajjad, E-mail: shalisajjad@yahoo.com, & Zhang, Jinlong. Study of new states in visible light active W, N co-doped TiO{sub 2} photo catalyst. United States. doi:10.1016/J.MATERRESBULL.2012.08.032.
Sajjad, Ahmed Khan Leghari, Shamaila, Sajjad, E-mail: shalisajjad@yahoo.com, and Zhang, Jinlong. Thu . "Study of new states in visible light active W, N co-doped TiO{sub 2} photo catalyst". United States. doi:10.1016/J.MATERRESBULL.2012.08.032.
@article{osti_22215540,
title = {Study of new states in visible light active W, N co-doped TiO{sub 2} photo catalyst},
author = {Sajjad, Ahmed Khan Leghari and Shamaila, Sajjad, E-mail: shalisajjad@yahoo.com and Zhang, Jinlong},
abstractNote = {Highlights: ► Visible light efficient W, N co-doped TiO{sub 2} photo catalysts are prepared by sol–gel. ► Oxygen vacancies are detected in the form of new linkages as N-Ti-O, N-W-O, Ti-O-N and W-O-N. ► W, N co-doped titania has new energy states which narrows the band gap effectively. ► Oxygen vacancies are proved to be the cause for high photo catalytic activity. ► W and N co-doping plays the major role to make the composite thermally stable. -- Abstract: The visible light efficient W, N co-doped TiO{sub 2} photo catalysts are prepared by sol–gel method. New linkages of N, W and O are formed as N-Ti-O, N-W-O, Ti-O-N and W-O-N. Electron paramagnetic resonance illustrates the presence of oxygen vacancies in W, N co-doped TiO{sub 2} acting as trapping agencies for electrons to produce active species. X-ray photoelectron spectroscopy confirms the presence of new energy states. New linkages and oxygen vacancies are proved to be the main cause for the improved photo catalytic performances. W, N co-doped TiO{sub 2} has new energy states which narrow the band gap effectively. W, N co-doped TiO{sub 2} is thermally stable and retains its anatase phase up to 900 °C. 4.5% W, N co-doped TiO{sub 2} showed superior activity for the degradation of Rhodamine B and 2,4-dichlorophenol as compared to pure titania, Degussa P-25, traditional N-doped TiO{sub 2} and pure WO{sub 3}.},
doi = {10.1016/J.MATERRESBULL.2012.08.032},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 11,
volume = 47,
place = {United States},
year = {2012},
month = {11}
}