| 초록 |
With the increasing interests of environmental-friendly energy, solar energy conversion for hydrogen via photocatalytic water splitting becomes a promising method. Among various photocatalysts, metal oxide is commonly used because of its nontoxic and eco-friendly properties. BiVO4 and TiO2 nanoparticles are considered as a co-catalyst for better photocatalytic performance. In this work, WO3/BiVO4/TiO2 heterostructure thin films have been manufactured. First, WO3 structure is made by the spin-coating of prepared solution on FTO substrate. Afterwards, BiVO4 and TiO2 nanoclusters are deposited on WO3 surfaces by same spin-coating method. The thickness of metal oxide film is controlled by changing the number of spin-coating cycles. The photoelectrochemical performance of photoelectrodes is analyzed using potentiostat(Iviumstat, Netherland) and IPCE. Structural and optical characterizations are measured by SEM to observe the morphology of WO3/BiVO4/TiO2 substrate and by UV-vis to investigate the light absorption. In order to measure the hydrogen evolution, gas chromatography and solar simulator are used. |
