| 초록 |
To enhance the photoreduction of CO2 into CH4, this study focused on a new typed photocatalyst, Sb1.5Sn8.5-xTixOy, which partially Ti-incorporated to the framework of ATO (antimony-doped tin oxide) with high conducting property and low band-gap, synthesized using a controlled hydrothermal method. The structures and properties of the Sb1.5Sn8.5-xTixOy (x=0, 0.5, 1.0, 1.5) photocatalysts were characterized by XRD, TEM, EDAX, XPS, BET, CV, UV–vis and PL spectroscopy. On the XRD and TEM analysis results, it was confirmed that the Sb1.5Sn8.5-xTixOy nanoparticles exhibited a tetragonal crystal structure with about 20 nm. The band-gap increased depends on Ti-addition. In the result of photoreduction of CO2 with H2O, the generated CH4 remarkable increased in Sb1.5Sn8.5-xTixOy catalysts, in particular, it was the best on the Sb1.5Sn8.5Ti1.0Oy, and it reached 3-fold higher than an anatase TiO2 presented for comparison. |
