| 초록 |
Zinc and copper are considered as excellent metals for oxidation and reducibility, respectively. To create a large number of activated sites on the catalyst's surface, the morphologies of the catalysts were controlled and several angular parts were formed. During the junction process, Cu2O and ZnO particles were controlled in cubic and starfish shapes, respectively, and the structure of the junctioned Cu2O/ZnO composite was similar to that of a chrysanthemum flower. The TRPL and IMVS, as well as the photocurrent density and IMPS, confirmed that the recombination between electrons and holes in the junctioned Cu2O/ZnO particles was very slow, and effective charge separation was achieved. As a result, the amount of hydrogen generated from the junction catalyst was significantly higher than that generated from the single catalysts. In particular, the accumulated amount of evolved hydrogen after 10 h in the 2Cu2O/1ZnO junction catalyst was 2089.5 μmol. |
