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The hydrobaric effect on cathodically deposited titanium dioxide photocatalyst

Published online by Cambridge University Press:  28 March 2017


Tso-Fu Mark Chang
Affiliation:
Institute of Innovative Research, Tokyo Institute of Technology, 4259-R2-35 Nagatsuta-cho Midori-ku Yokohama 226-8503, Japan CREST, Japan Science and Technology Agency, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
Wei-Hao Lin
Affiliation:
Institute of Innovative Research, Tokyo Institute of Technology, 4259-R2-35 Nagatsuta-cho Midori-ku Yokohama 226-8503, Japan Department of Materials Science and Engineering, National Chiao Tung University, 1001 University Road, Hsinchu 30010, Taiwan
Chun-Yi Chen
Affiliation:
Institute of Innovative Research, Tokyo Institute of Technology, 4259-R2-35 Nagatsuta-cho Midori-ku Yokohama 226-8503, Japan CREST, Japan Science and Technology Agency, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
Yung-Jung Hsu
Affiliation:
Department of Materials Science and Engineering, National Chiao Tung University, 1001 University Road, Hsinchu 30010, Taiwan
Masato Sone
Affiliation:
Institute of Innovative Research, Tokyo Institute of Technology, 4259-R2-35 Nagatsuta-cho Midori-ku Yokohama 226-8503, Japan CREST, Japan Science and Technology Agency, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
Corresponding

Abstract

The hydrobaric effect on photoactivity of titanium dioxide (TiO2) fabricated by cathodic deposition in an aqueous solution was evaluated in this study. When the applied pressure was increased to 35 MPa, the water-splitting performance was improved by almost fourfold of the performance of the TiO2 prepared at atmospheric pressure. The surface states effect was significant in the deposited TiO2, which was exploited to affect the charges recombination of TiO2, and thereby enhance the resultant photoelectrochemical water-splitting performance. The hydrobaric cathodic deposition could be extended to fabrication of other metal oxides to eliminate the negative influence from the high-temperature process.


Type
Research Letters
Copyright
Copyright © Materials Research Society 2017 

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