Natural‐Sunlight‐Driven H 2 O 2 Photosynthesis Over Bandgap Engineered Truxene‐Based Porous Aromatic Frameworks

Developing efficient photocatalysts for hydrogen peroxide (H 2 O 2 ) photosynthesis driven by natural sunlight is of great interest. In this study, we designed two photoactive donor (D)–acceptor (A) type truxene‐based porous aromatic frameworks (Tx‐PAFs) by introducing different electron acceptors as linker units. It was found that fluorenone‐linked Tx‐PAF with stronger D–A interaction exhibits a broader light absorption range and enhanced charge separation. This Tx‐PAF displayed the superior photocatalytic H 2 O 2 production with the rates of 3443 μmol g −1 h −1 (O 2 atmosphere) and 1153 μmol g −1 h −1 (air) under Xe lamp irradiation. Notably, it can also achieve an H 2 O 2 production rate of 716 μmol g −1 h −1 even under natural sunlight irradiation. This work provides feasible access to designing efficient and stable PAF‐based photocatalysts for H 2 O 2 production directly driven by solar energy.