Covalent Organic Framework (COF)/Molybdenum Disulfide (MoS 2 ) Heterostructures for Visible-Light-Driven Hydrogen Peroxide Synthesis

Sustainable hydrogen peroxide (H2O2) production is crucial for addressing environmental challenges and advancing chemical synthesis. Photosynthesis of H2O2 from water, oxygen, and light offers an eco-friendly and cost-effective alternative to conventional methods; however, its practical application is limited by the poor performance of traditional photocatalysts due to rapid charge recombination, inefficient charge utilization, and limited redox capability. Herein, we developed a hybrid photocatalyst by integrating MoS2 nanosheets into a covalent organic framework (COF), forming a MoS2–1,3,5-triformylphloroglucinol–4,4′,4″-(1,3,5-triazine-2,4,6-triyl)-trianiline (MoS2–Tp–TAPT) heterostructure. This structure exhibits enhanced charge separation, reduced charge transfer resistance, and improved stability during photocatalytic reactions in pure water. Control experiments revealed that H2O2 generation proceeds via two synergistic pathways. The optimized 3% MoS2–Tp–TAPT catalyst achieved a high H2O2 production rate of 667 μmol g–1 h–1, significantly outperforming the pristine COF. This work demonstrates an effective strategy to enhance both the stability and the photocatalytic efficiency of COFs through hybrid structure engineering.