High performance visible light responsive photocatalysts for environmental cleanup via solution processing |
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| Authors: | Tsugio Sato Peilin Zhang Shu Yin |
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| Institution: | 1. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China;2. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan;3. College of Chemistry and Biological Engineering, Taiyuan University of Science and Technology, Taiyuan 030021, China;1. School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China;2. Institute of Multidisciplinary Research for Advanced Material, Tohoku University, Sendai 980-8577, Japan |
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| Abstract: | 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. |
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