Photocatalytic H-2 evolution under visible light irradiation on Ni-doped ZnS photocatalyst

Zn0.999Ni0.001S photocatalysts (energy gap = 2.3 eV) heat-treated at 773 K in an N-2 flow showed activity for hydrogen evolution from aqueous solutions containing K2SO3 and Na2S as reducing reagents under visible light irradiation without co-catalysts such as Pt.