Journal
PROGRESS IN CRYSTAL GROWTH AND CHARACTERIZATION OF MATERIALS
Volume 58, Issue 2-3, Pages 92-105Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.pcrysgrow.2012.02.001
Keywords
Soft chemical processes; Low-temperature synthesis; Hydrothermal; Solvothermal; Mechanochemical doping; Nitrogen-doped titania; Nitrogen-doped strontium titanate; Visible light responsive photocatalyst; deNO(x)
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Fabrication of nitrogen-doped titania and/or strontium titanate nanoparticles via soft chemical reactions and their performance for environmental cleanup under visible light irradiation were introduced. Nitrogen-doped anatase, brookite and rutile with high specific surface area can be selectively prepared by the solvothermal reactions in mixed aqueous solution of titanium trichloride-hexamethylenetetramine. Nitrogen-doped strontium titanate can be prepared by mechanochemical reaction of strontium carbonate, titania and hexamethylenetetramine using a planetary ball-mill. Nitrogen-doped titania shows excellent photocatalytic activity for the nitrogen monoxide destruction under visible light irradiation. The photocatalytic activity of nitrogen-doped titania is in the order anatase > brookite > rutile. The photocatalytic activity of nitrogen-doped titania and strontium titanate can be improved by co-doping with higher valence metal ions to reduce oxygen vacancy and/or coupling with Fe2O3 and Pt to retard quick recombination of photo-induced electron and hole by the heterogeneous electron transfer. (C) 2012 Elsevier Ltd. All rights reserved.
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