Photocatalytic Activity of WO3/BiVO4 Self – Assembled Nanocomposite
Chien Nguyen Van1*, Do Thi Hien1, Jhih-Wei Chen2, Wen-Yen Tzeng3, Heng-Jui Liu1, Kai-An Tasi1, Chung-Lin Wu2, Yi-Chun Chen2, Chih-Wei Luo3, Yung-Jung Hsu1, Ying-Hao Chu1,4
1Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
2Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan
3Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan
4Institute of Physics, Academia Sinica, Taipei, Taiwan
* presenting author:nguyen van chien,
We report on a novel WO3/BiVO4 self – assembled heterostructure photoanode, which are prepared by pulse laser deposition method for photoelectrochemical water splitting. The heterostructure photoanode show significantly improved photoactiviy comparing with pure WO3 and BiVO4. We believe that the high interface area, which can improve separation of photogenerated charge at the interface, is responsible for the enhanced photoactivity of WO3/BiVO4. The film morphologies, crystal structures and electronic band structure characterized by field emission scanning electron microscopy, X-ray diffraction, transmission electron microscopy and X-ray photoemission spectroscopy.

Keywords: charge transfer, heterostructure, water splitting