Abstract
The author made a light-source device with blue LEDs. Although the device is cheap and simple it is enough to investigate photocatalyst properties of visible-light-driven photocatalysts. Moreover, preparation and diffuse reflection spectrum measurements of metal-sulfide photocatalysts AgInS2-ZnS were carried out. The desired solid solutions (AgIn)xZn2(1-x)S2 between AgInS2 and ZnS with wurtzite structure could be prepared as single-phase materials. The diffuse reflection spectra for these solid solutions indicate they may be suitable for photocatalysts with visible-light response. These solid solutions showed photocatalytic activities for H2 evolution from aqueous solutions containing sacrificial reagents SO32- under visible-light irradiation with blue LEDs.
