| 초록 |
This study focuses on the relationship between the photocatalytic activity of benzene and the surface properties of nano-sized Al/TiO2. The XRD pattern for Al/TiO2 developed a stable anatase structure after thermal treatment at 800℃. The XPS and TG results showed that Al/TiO2 possessed a higher hydrophilic property than pure TiO2 did. The TPR results also revealed that the Ti3+ or Ti4+ in Al/TiO2 could be easily reduced into Ti0, compared with pure TiO2. The photodecomposition of benzene was enhanced in Al/TiO2 compared to pure TiO2, especially with H2O addition. The catalytic activities of TiO2 and 10.0-wt-% Al/TiO2 were almost the same in the plasma system. The conversion to CO2, however, was slightly enhanced in the case of 10.0-wt-% Al/TiO2. Nonetheless, upon H2O addition, the conversion to CO2 in both catalysts was remarkably increased. This outcome may be attributed to the presence of the OOH radical in both catalysts, which induced the complete oxidation reaction of benzene in TiO2 and 10.0-wt-% Al/TiO2. |
