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Received January 16, 2017
Accepted March 13, 2017
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Effective photoconversion of CO2 into CH4 over Ti30Si70MCM-41 nanoporous catalyst photosensitized by a ruthenium dye
Department of Chemistry, College of Natural Sciences, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Korea
Korean Journal of Chemical Engineering, June 2017, 34(6), 1669-1677(9), 10.1007/s11814-017-0073-6
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Abstract
Nanoporous Ti30Si70MCM-41 was applied as a photocatalyst for effective reduction of CO2 to CH4. A ruthenium dye (N719) was also introduced onto the surface of Ti30Si70MCM-41 as a photosensitizer to improve its photoabsorption in the visible range. The catalytic performance of N719-photosensitized Ti30Si70MCM-41 was superior to that of the non-photosensitized Ti30Si70MCM-41 and N719-photosensitized Ti30Si70O200 nanomaterials. The photoreduction of CO2 to CH4 was remarkably improved on N719-(5 h)-photosensitized Ti30Si70MCM-41, with a production of 1,900 μmol gcat -1 L-1 after an 8 h reaction. The results were attributed to the effective charge separation and the inhibited recombination of photogenerated electron-hole pairs on N719-photosensitized Ti30Si70MCM-41. Lastly, a model for the enhanced photoactivity over N719-photosensitized Ti30Si70MCM-41 was proposed.
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References
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Sookhakian M, Amin YM, Baradaran S, Tajabadi MT, Golsheikh AM, Basirun WJ, Thin Solid Films, 552, 204 (2014)
