Abstract Scope |
Bifunctional photocatalyst has received increasing attention due to its best utilization of photogenerated holes and electrons. Herein, we introduce a novel step-scheme (S-scheme) heterojunction constructed by metal-organic frameworks-derived hollow ZnO nanoboxes and CuInS2 quantum dots. The composite sample exhibits a robust photocatalytic H2O2 production rate (0.31 mmol L–1 h–1), coupling with a glycerin oxidation rate (0.27 mmol L–1 h–1) with a selectivity of 56.1% towards dihydroxyacetone. The boosted activity can be mainly attributed to the formation of S-scheme heterojunction, which effectively retains photogenerated carriers with supreme redox activity. Furthermore, the charge migration between ZnO and CuInS2 increases the concentration of free charge carriers in the p-type semiconductor at the interface, which enhances the localized surface plasmon resonance effect and near-infrared-response of CuInS2. This work provides new insights into designing new types of bifunctional photocatalysts towards high-efficiency photocatalytic H2O2 production coupling with organic synthesis. |