TY - JOUR
T1 - Novel dual-layer photoelectrode prepared by RF magnetron sputtering for photocatalytic water splitting
AU - Liao, Chi Hung
AU - Huang, Chao Wei
AU - Wu, Jeffrey C.S.
N1 - Funding Information:
This work was financially supported by the National Science Council under the project of NSC 100-2221-E-002-137 . The authors would like to express their acknowledgement for the experimental support offered by the Institute of Nuclear Energy Research, Atomic Energy Council.
PY - 2012/8
Y1 - 2012/8
N2 - Visible-light absorbing TiO 2 and WO 3 photocatalytic thin films were prepared by radio-frequency (RF) magnetron sputtering. The effects of sputtering condition on the structural, optical, as well as photocatalytic properties of the prepared thin films were explored. In addition, a novel dual-layer photocatalytic thin film that combines both visible-light TiO 2 and WO 3 was prepared by the same deposition technique to further enhance the photocatalytic performance. Instrumental analyses such as XRD, SEM-EDX, and UV-visible absorption spectrometry were performed to reveal the crystallinity, surface morphology, chemical composition, and light absorption of the prepared photocatalytic thin films. The activities of the prepared photocatalytic thin films under both UV and visible-light irradiations were evaluated by conducting photovoltammetry and water-splitting reaction in an H-type reactor. The enhanced photocurrent of dual-layer photocatalytic thin film was proved to be resulted from the improved charge separation of the dual-layer structure. The H 2 and O 2 yields obtained from the water-splitting reactions were consistent with the photocurrent results, showing dual-layer photocatalyst with higher photoactivity than mono-layer photocatalyst.
AB - Visible-light absorbing TiO 2 and WO 3 photocatalytic thin films were prepared by radio-frequency (RF) magnetron sputtering. The effects of sputtering condition on the structural, optical, as well as photocatalytic properties of the prepared thin films were explored. In addition, a novel dual-layer photocatalytic thin film that combines both visible-light TiO 2 and WO 3 was prepared by the same deposition technique to further enhance the photocatalytic performance. Instrumental analyses such as XRD, SEM-EDX, and UV-visible absorption spectrometry were performed to reveal the crystallinity, surface morphology, chemical composition, and light absorption of the prepared photocatalytic thin films. The activities of the prepared photocatalytic thin films under both UV and visible-light irradiations were evaluated by conducting photovoltammetry and water-splitting reaction in an H-type reactor. The enhanced photocurrent of dual-layer photocatalytic thin film was proved to be resulted from the improved charge separation of the dual-layer structure. The H 2 and O 2 yields obtained from the water-splitting reactions were consistent with the photocurrent results, showing dual-layer photocatalyst with higher photoactivity than mono-layer photocatalyst.
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U2 - 10.1016/j.ijhydene.2012.05.107
DO - 10.1016/j.ijhydene.2012.05.107
M3 - Article
AN - SCOPUS:84863781417
SN - 0360-3199
VL - 37
SP - 11632
EP - 11639
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 16
ER -
