Fabrication of the SnS2/ZnIn2S4 heterojunction for highly efficient visible light photocatalytic H2 evolution

A series of SnS2/ZnIn2S4 (x-SS/ZIS) photocatalysts with different mass ratios of SnS2 were prepared by a hydrothermal method. The resulted composites were used for photocatalytic hydrogen evolution under visible light excitation. All the SS/ZIS composites exhibited significantly enhanced photocatalytic activity for H-2 evolution. Obviously, the highest H-2 evolution rate of 769 mmol g(-1) h(-1) was observed over 2.5-SS/ZIS, which was approximately 10.5 times that of the ZnIn2S4 (73 mmol g(-1) h(-1)). The enhanced photocatalytic performance was attributed to the successful construction of SnS2/ZnIn2S4 heterojunctions, leading to rapid charge separation and fast transfer of the photo-generated electrons and holes under light irradiation. On the basis of PL, electrochemical impedance spectroscopy (EIS), photocurrent measurements and the H-2 evolution tests, a plausible photocatalytic mechanism was proposed.& nbsp;(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

A series of SnS2/ZnIn2S4 photocatalysts with different mass ratios of SnS2 were prepared and used for photocatalytic hydrogen evolution under visible light excitation. Enhanced photocatalytic activity was observed in all the composites, with 2.5-SS/ZIS achieving the highest H-2 evolution rate.