| 초록 |
Nanoporous Ti30Si70MCM-41 is applied as a photocatalyst for effectively reducing CO2 to CH4. A ruthenium dye (N719) is also introduced onto the surfaces of Ti30Si70MCM-41 as a photosensitizer to improve its photo-absorption in the visible range. The catalytic performance of N719-photosensitized-Ti30Si70MCM-41 is superior to that of the non-photosensitized Ti30Si70MCM-41 and N719-photosensitized-Ti30Si70O200 nanomaterials. The photoreduction of CO2 to CH4 is 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 are attributed to the effective charge separation and the inhibited recombination of photogenerated electron–hole pairs on N719-photosensitized Ti30Si70MCM-41. Finally, a model for the enhanced photoactivity over N719-photosensitized-Ti30Si70MCM-41 is proposed. |
