A non-noble metal MoS2-Cd0.5Zn0.5S photocatalyst with efficient activity for high H2 evolution under visible light irradiation

Here we describe the synthesis and characteristics of MoS2-Cd0.5Zn0.5S, an efficient non-noble metal photocatalyst of H-2 evolution from water under visible light irradiation. This new quaternary composite was successfully synthesized by using a two-step hydrothermal method. The formation of a uniform Cd0.5Zn0.5S solid solution through hydrothermal coprecipitation and the subsequent loading of a suitable amount of MoS2 were essential to enhance the catalytic activity of the MoS2-Cd0.5Zn0.5S photocatalyst, which exhibited a synergistic effect for H-2 evolution derived from splitting water. This photocatalyst exhibited good photostability and high photocatalytic activity, which was maintained even after being re-used three times. An H-2 evolution rate of 12.30 mmol h(-1) g(-1) was achieved under visible light irradiation from an aqueous solution of lactic acid, indicative of superior water-splitting activity for this noble metal-free photocatalyst.