title: Photocatalysis using a Wide Range of the Visible Light Spectrum: Hydrogen Evolution from Doped AgGaS2.
abstract: Doping of nickel into AgGaS2 yields a new absorption band, at a wavelength longer than the intrinsic absorption band of the AgGaS2 host. The doped nickel forms an electron donor level in a forbidden band of AgGaS2 . The nickel-doped AgGaS2 with rhodium co-catalyst shows photocatalytic activity for sacrificial H2 evolution under the light of up to 760 nm due to the transition from the electron donor level consisting of Ni(2+) to the conduction band of AgGaS2 . Apparent quantum yields for the sacrificial H2 evolution at 540-620 nm are about 1 %. Moreover, the nickel-doped AgGa0.75 In0.25 S2 also responds to near-IR light, up to 900 nm.
authors.affiliation: Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3, Kagurazaka, Shinjyuku-ku, Tokyo 162-8601 (Japan).
authors.forename: Kohei
authors.initials: K
authors.lastname: Yamato
authors.affiliation: Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3, Kagurazaka, Shinjyuku-ku, Tokyo 162-8601 (Japan).|Photocatalysis International Research Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510 (Japan).
authors.forename: Akihide
authors.initials: A
authors.lastname: Iwase
authors.affiliation: Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3, Kagurazaka, Shinjyuku-ku, Tokyo 162-8601 (Japan). a-kudo@rs.kagu.tus.ac.jp.|Photocatalysis International Research Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510 (Japan). a-kudo@rs.kagu.tus.ac.jp.
authors.forename: Akihiko
authors.initials: A
authors.lastname: Kudo
mesh_terms: D002384:Catalysis; D005708:Gallium / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry*; D008027:Light; D055668:Photochemical Processes; D012834:Silver / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D013440:Sulfides; D012834:Silver; D006859:Hydrogen; D005708:Gallium
keywords: doping; heterogeneous catalysis; hydrogen; nickel; photocatalysis