Title:
PHOTOCATALYST COMPOSITION AND METHOD FOR PRODUCING A PHOTOCATALYST COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2011/148683
Kind Code:
A1
Abstract:
Provided are a photocatalyst composition that can split water into oxygen and hydrogen by absorbing visible light without using redox reagents or sacrificial agents and a method for producing the photocatalyst composition. The photocatalyst composition is configured by bringing a hydrogen-evolving photocatalyst which splits water to evolve hydrogen when irradiated with light in contact with an oxygen-evolving photocatalyst which splits water to evolve oxygen when irradiated with light. The hydrogen-evolving photocatalyst comprises a substance wherein the lower edge of the conduction band is a more negative potential than 0 V, and the substance has a band gap energy of less than 3.0 eV. The oxygen-evolving photocatalyst comprises a substance wherein the potential of the upper edge of the valence band with respect to the standard hydrogen electrode is more positive than 1.23 V, and the substance has a band gap energy less than 3.0 eV. When potentials with respect to the standard hydrogen electrode potential are compared, the Fermi level of said hydrogen-evolving photocatalyst is more negative than or equal to the Fermi level of said oxygen-evolving photocatalyst.
Inventors:
IRIE, Hiroshi (4-4-37 Takeda, Kofu-sh, Yamanashi 10, 〒4008510, JP)
入江 寛 (〒10 山梨県甲府市武田四丁目４番３７号 国立大学法人山梨大学内 Yamanashi, 〒4008510, JP)
SATO, Tetsuya (4-4-37 Takeda, Kofu-sh, Yamanashi 10, 〒4008510, JP)
入江 寛 (〒10 山梨県甲府市武田四丁目４番３７号 国立大学法人山梨大学内 Yamanashi, 〒4008510, JP)
SATO, Tetsuya (4-4-37 Takeda, Kofu-sh, Yamanashi 10, 〒4008510, JP)
Application Number:
JP2011/053946
Publication Date:
December 01, 2011
Filing Date:
February 23, 2011
Export Citation:
Assignee:
UNIVERSITY OF YAMANASHI (4-4-37, Takeda Kofu-sh, Yamanashi 10, 〒4008510, JP)
国立大学法人山梨大学 (〒10 山梨県甲府市武田四丁目４番３７号 Yamanashi, 〒4008510, JP)
IRIE, Hiroshi (4-4-37 Takeda, Kofu-sh, Yamanashi 10, 〒4008510, JP)
入江 寛 (〒10 山梨県甲府市武田四丁目４番３７号 国立大学法人山梨大学内 Yamanashi, 〒4008510, JP)
国立大学法人山梨大学 (〒10 山梨県甲府市武田四丁目４番３７号 Yamanashi, 〒4008510, JP)
IRIE, Hiroshi (4-4-37 Takeda, Kofu-sh, Yamanashi 10, 〒4008510, JP)
入江 寛 (〒10 山梨県甲府市武田四丁目４番３７号 国立大学法人山梨大学内 Yamanashi, 〒4008510, JP)
International Classes:
B01J35/02; B01J23/30; B01J37/00; C01B3/04
Attorney, Agent or Firm:
MATSUURA, Kenzo (Matsuura & Associates, P.O. Box 176 Shinjuku Sumitomo Bldg. 23F, 6-1, Nishi-shinjuku 2-chome, Shinjuku-k, Tokyo 23, 〒1630223, JP)
Claims: