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Photocatalysis using a Wide Range of the Visible Light Spectrum: Hydrogen Evolution from Doped AgGaS 2
Author(s) -
Yamato Kohei,
Iwase Akihide,
Kudo Akihiko
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201500540
Subject(s) - nickel , photocatalysis , visible spectrum , doping , photochemistry , materials science , absorption (acoustics) , catalysis , hydrogen , rhodium , optoelectronics , chemistry , metallurgy , biochemistry , composite material , organic chemistry
Doping of nickel into AgGaS 2 yields a new absorption band, at a wavelength longer than the intrinsic absorption band of the AgGaS 2 host. The doped nickel forms an electron donor level in a forbidden band of AgGaS 2 . The nickel‐doped AgGaS 2 with rhodium co‐catalyst shows photocatalytic activity for sacrificial H 2 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 AgGaS 2 . Apparent quantum yields for the sacrificial H 2 evolution at 540–620 nm are about 1 %. Moreover, the nickel‐doped AgGa 0.75 In 0.25 S 2 also responds to near‐IR light, up to 900 nm.