| 초록 |
This study examined hydrogen production over Ag-TiO2 photocatalysts containing AgxO, a conducting component. Nanometer particles of 0.1 mol% Ag-TiO2 were produced using the conventional sol-gel method; they were treated at 500 and 800 ºC to obtain the anatase and rutile structures, respectively. The Ag2O (200 and 220 plane) peaks at 2θ = 38.04º and 54.4º, respectively, appeared in Ag-TiO2 treated at 800 ºC. The H2 production from methanol photodecomposition was greater over the rutile structure than over the anatase structure of TiO2. Moreover, the amount of hydrogen was enhanced over Ag-TiO2 compared to pure TiO2; the production reached 17,124 mole after 24 h over rutile Ag-TiO2. After methanol photodecomposition, the amount of Ag component in the Ag-TiO2 photocatalysts increased, while the Ag2O component decreased. |
