Title:
PHOTOCATALYST MATERIAL AND PHOTOCATALYST DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/162372
Kind Code:
A1
Abstract:
Provided are a photocatalyst material and photocatalyst device capable of efficiently producing hydrogen from water through solar radiation. The photocatalyst material comprises a nitride-compound semiconductor in which some of the Ga and/or Al have been replaced with a 3d transition metal, has one or more impurity bands, and the nitride-compound semiconductor has a photo-absorption coefficient in the entire wavelength range between 300nm and 1500nm that is equal to or greater than 1000cm-1. The material satisfies the following conditions: the energy level of the conductor base is more negative than the redox potential of H+/H2; and the energy level of the top of the valence band is more positive than the redox potential of O2/H20. There is very little or no degradation in the material when photoirradiated underwater.
Inventors:
SONODA, Saki (1 Matsugasaki Hashikami-cho, Sakyo-ku, Kyoto-sh, Kyoto 85, 〒6068585, JP)
園田 早紀 (〒85 京都府京都市左京区松ヶ崎橋上町１番地 国立大学法人京都工芸繊維大学内 Kyoto, 〒6068585, JP)
KAWASAKI, Osamu (1 Matsugasaki Hashikami-cho, Sakyo-ku, Kyoto-sh, Kyoto 85, 〒6068585, JP)
川崎 修 (〒85 京都府京都市左京区松ヶ崎橋上町１番地 国立大学法人京都工芸繊維大学内 Kyoto, 〒6068585, JP)
園田 早紀 (〒85 京都府京都市左京区松ヶ崎橋上町１番地 国立大学法人京都工芸繊維大学内 Kyoto, 〒6068585, JP)
KAWASAKI, Osamu (1 Matsugasaki Hashikami-cho, Sakyo-ku, Kyoto-sh, Kyoto 85, 〒6068585, JP)
川崎 修 (〒85 京都府京都市左京区松ヶ崎橋上町１番地 国立大学法人京都工芸繊維大学内 Kyoto, 〒6068585, JP)
Application Number:
JP2011/064534
Publication Date:
December 29, 2011
Filing Date:
June 24, 2011
Export Citation:
Assignee:
NATIONAL UNIVERSITY CORPORATION KYOTO INSTITUTE OF TECHNOLOGY (1 Matsugasaki Hashikami-cho, Sakyo-ku Kyoto-sh, Kyoto 85, 〒6068585, JP)
国立大学法人京都工芸繊維大学 (〒85 京都府京都市左京区松ヶ崎橋上町１番地 Kyoto, 〒6068585, JP)
SONODA, Saki (1 Matsugasaki Hashikami-cho, Sakyo-ku, Kyoto-sh, Kyoto 85, 〒6068585, JP)
園田 早紀 (〒85 京都府京都市左京区松ヶ崎橋上町１番地 国立大学法人京都工芸繊維大学内 Kyoto, 〒6068585, JP)
KAWASAKI, Osamu (1 Matsugasaki Hashikami-cho, Sakyo-ku, Kyoto-sh, Kyoto 85, 〒6068585, JP)
国立大学法人京都工芸繊維大学 (〒85 京都府京都市左京区松ヶ崎橋上町１番地 Kyoto, 〒6068585, JP)
SONODA, Saki (1 Matsugasaki Hashikami-cho, Sakyo-ku, Kyoto-sh, Kyoto 85, 〒6068585, JP)
園田 早紀 (〒85 京都府京都市左京区松ヶ崎橋上町１番地 国立大学法人京都工芸繊維大学内 Kyoto, 〒6068585, JP)
KAWASAKI, Osamu (1 Matsugasaki Hashikami-cho, Sakyo-ku, Kyoto-sh, Kyoto 85, 〒6068585, JP)
International Classes:
B01J27/24; B01J35/02; C01B3/04
Attorney, Agent or Firm:
TANAKA, Mitsuo et al. (AOYAMA & PARTNERS, IMP Building 3-7, Shiromi 1-chome, Chuo-ku, Osaka-sh, Osaka 01, 〒5400001, JP)
Claims: