The well-designed wollastonite-ZnIn2S4 composite photocatalysts for efficient hydrogen production

A sustainable pathway to green hydrogen generation, the design and synthesis of targeted photocatalysts based on semiconductors or other organic/inorganic materials has emerged as a promising approach for efficient hydrogen production under light irradiation. In this paper, wollastonite-ZnIn 2 S 4 composite photocatalysts (ZIS-W) were successfully prepared by the chemical deposition method with wollastonite as the carrier. The hydrogen evolution reaction from water under simulated sunlight irradiation and the enhancement mechanism of ZIS-W were investigated. The results showed that ZIS-W exhibits favorable photocatalytic hydrogen evolution performance and stability, and the photocatalytic hydrogen evolution efficiency of ZIS-W was 4.94 ​mmol ​h −1  ​g −1 , which was 1.44 times higher than that of pure ZnIn 2 S 4 . The unique crystal structure of wollastonite provides favorable conditions for the growth of ZnIn 2 S 4 and effectively enhances the dispersion and stability of ZnIn 2 S 4 . The recombination of photogenerated electron-hole pairs was effectively suppressed while the specific surface area was increased. This study provided a facile synthesis method for preparing photocatalysts with highly efficient hydrogen generation.