| 초록 |
Photocatalytic CO2 reduction is a promising strategy to minimize atmospheric CO2 concentrations. However, it requires significant efforts for improved photoreduction performance and product selectivity. Herein, we developed newly reduced TiO2, prepared by a reduction process using Mg in 5% H2/Ar. Using Pt nanoparticles as a co-catalyst, under simulated solar light irradiation the reduced anatase TiO2 exhibits a threefold increase in the rate of CH4 production (1640.58 ppm g−1 h−1, 1.13 μmol g−1 h−1) as compared to anatase TiO2 nanoparticles. The improved photocatalytic performance is attributed to enhanced light absorption and suitable band edge alignment with respect to the CO2/CH4 redox potential. We found that reduced TiO2 was rich in oxygen vacancy (Vo) and Ti3+, promoting charge transport and CO2 activation as electron donors. This poster is reviewed Appl. Catal. B: Environ. 215, 2017, 28-35 paper. |
