High Efficiency Photocatalytic Hydrogen Production with Zn-Via (Via=O, S, Se, Te) Enhanced by Lamellar Cu2mos4  Under Visible Ligh

Abstract

Cu2MoS4 became a novel active alternative material to noble metal co-catalysts, which can effectively promote photocatalytic hydrogen evolution. In order to investigate the effect of Cu2MoS4 on the photocatalytic performance of Zn-ⅥA compounds, ZnO, ZnS, ZnSe, and ZnTe were composited with Cu2MoS4 to construct the photocatalysts, and we analyzed the four catalysts for the crystal structure, microscopic morphology, photoelectronic properties, and hydrogen evolution performance. Comparing the four different photocatalysts, the composite of ZnSe and Cu2MoS4 has the highest photocatalytic hydrogen evolution efficiency, and the hydrogen evolution rate of the optimal ratio of ZSeC-20 reaches about 2617 μmol/g/h, which is about 46 times higher than that of pure ZnSe. It is attributed to the loading of Cu2MoS4 to build a heterogeneous structure, which reduces the photogenerated electron and hole recombination rate, which enhances the photocatalytic water splitting hydrogen evolution rate.

Keywords: Zn-ⅥA, ZnSe, Cu2MoS4, Photocatalytic, Hydrogen, lamellar