| 초록 |
A novel photoanode architecture consisting of CdS nanoflower (NF)/rutile(R)-TiO2 nanorod (NR) heterojunction were successfully synthesis using ethylenediamine (EDA) as a solvent, template and coordination agents by facile two-step hydrothermal process. The optimal photocurrent density of the CdS NF(MC)/R-TiO2 NR heterojunction is 3.23 mACm-2. This photoanode shows 60.68 % higher than that of the pristine R-TiO2 NR, due to an effective light absorption, an appropriate band-edge position, the charge separation and less recombination. The vital role of CdS NFs acted as an efficient visible-light absorber, and synergistic charge-separation effect regarding the CdS NF grafted onto the R-TiO2 NR facet only, while the R-TiO2 NRs acted as an ultraviolet-light absorber as well as an electron transporter. The optimal CdS NF(MC)/R-TiO2 NR heterojunction showed a photo electrochemical hydrogen generation of 336µmol/h. The current novel heterojunction photoanode can shed light on the fabrication of new, cheap photocatalysts for the effective generation of hydrogen. |
