Coupling ZnIn 2 S 4 Nanosheets with MoS 2 Hollow Nanospheres as Visible-Light-Active Bifunctional Photocatalysts for Enhancing H 2 Evolution and RhB Degradation.

In this study, Mo-glycerate was used as a precursor to create MoS 2 hollow nanospheres (HNS), which were then used for the first time to modify ZnIn 2 S 4 nanosheets to create MoS 2 HNS/ZnIn 2 S 4 photocatalysts. The findings demonstrate that MoS 2 HNS/ZnIn 2 S 4 heterojunctions exhibited remarkably boosted photocatalytic properties and excellent reusability for both RhB degradation and H 2 evolution without the use of Pt as a co-catalyst. Among the heterojunctions, the RhB degradation and H 2 evolution efficiencies of the optimized MoS 2 HNS/ZnIn 2 S 4 -3 wt % composite were almost 5 and 34 times higher than those of ZnIn 2 S 4 , respectively. The excellent performance of MoS 2 HNS/ZnIn 2 S 4 -3 wt % might be attributed to the expansion of the visible-light response range and the accelerated separation efficiency of photo-induced carriers, according to the findings of the optical property tests. Based on the established band gap position and characterization results, a potential mechanism for appealing photocatalytic activity over MoS 2 HNS/ZnIn 2 S 4 heterojunctions was also postulated.