| 초록 |
Bi ions were inserted into a TiO2 framework in order improve the CO2 reduction. The x-mol% Bi ion-incorporated TiO2s were prepared by a conventional sol-gel method, and characterized by XRD, TEM, UV-visible spectroscopy, photocurrent spectroscopy, and CO2-TPD. The adsorption of CO2 was significantly increased on Bi-TiO2s, which demonstrated superior photocatalytic behavior compared to that of pure TiO2. The 5.0 mol.-% Bi-TiO2 produced 3,400 μmol gcat−1L−1CH4 gases after an 8 h reaction. The photocatalytic activity was dramatically enhanced by the improved effective CO2 gas adsorption and by the inhibited recombination of photogenerated electron–hole pairs due to the enhanced charge separation. |
