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.