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Effective photoconversion of CO2 into CH4 over Ti30Si70MCM-41 nanoporous catalyst photosensitized by a ruthenium dye

  • Catalysis, Reaction Engineering
  • Published:
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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 g cat −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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Authors and Affiliations

  1. Department of Chemistry, College of Natural Sciences, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Korea

    Younghwan Im, Jae Hyung Lee & Misook Kang

Authors
  1. Younghwan Im
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  2. Jae Hyung Lee
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  3. Misook Kang
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Correspondence to Misook Kang.

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Im, Y., Lee, J.H. & Kang, M. Effective photoconversion of CO2 into CH4 over Ti30Si70MCM-41 nanoporous catalyst photosensitized by a ruthenium dye. Korean J. Chem. Eng. 34, 1669–1677 (2017). https://doi.org/10.1007/s11814-017-0073-6

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  • DOI: https://doi.org/10.1007/s11814-017-0073-6

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