Spatially controllable plasmon enhanced water splitting photocurrent in Au/TiO sub(2)-Fe sub(2)O sub(3) cocatalyst system

Photocatalytic water splitting has been improved in this work by exploiting a Au/TiO sub(2)-Fe sub(2)O sub(3) plasmonic cocatalyst system. A 5-fold improvement of water splitting photocurrent was observed in the Au/TiO sub(2)-Fe sub(2)O sub(3) photoelectrode compared to that of iron oxide only. In o...

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Bibliographic Details
Published in:RSC advances 2014-09, Vol.4 (86), p.45710-45714
Main Authors: Hung, Wei-Hsuan, Chien, Tzu-Ming, Lo, An-Ya, Tseng, Chuan-Ming, Li, Dongdong
Format: Article
Language:English
Subjects:
Gold
Photocurrent
Photoelectric effect
Plasmonics
Plasmons
Stability
Titanium dioxide
Water splitting
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Summary:Photocatalytic water splitting has been improved in this work by exploiting a Au/TiO sub(2)-Fe sub(2)O sub(3) plasmonic cocatalyst system. A 5-fold improvement of water splitting photocurrent was observed in the Au/TiO sub(2)-Fe sub(2)O sub(3) photoelectrode compared to that of iron oxide only. In order to investigate the enhanced mechanism of this plasmonic cocatalyst system, different plasmonic photoelectrodes were systematically examined under different visible light lasers. The crystallography of the TiO sub(2)-Fe sub(2)O sub(3) cocatalyst was characterized by high-resolution transmission electron microscopy (HRTEM) and X-ray diffractometer (XRD). UV-visible spectroscopy (UV-vis) was employed to determine the plasmon enhanced absorption of photoelectrodes. In addition, a spatially controllable plasmon enhanced water splitting photocurrent was demonstrated in this study.
ISSN:2046-2069
DOI:10.1039/c4ra05143b