Schottky Junction and D–A ₁ –A ₂ System Dual Regulation of Graphite‐Phase Carbon Nitride for Piezo‐Photocatalytic H ₂ O ₂ Production

Graphitic carbon nitride had garnered significant attention in recent years for its potential to produce clean H₂O₂ using solar energy. While current research primarily focused on pollutant degradation, the synthesis of H₂O₂ remaind underexplored. This project sought to enhanced graphitic carbon nitride (g -C₃N₄) by incorporating benzene rings (Ph) and bismuth (Bi) single atoms to form an organic polymer (Ph-g-C₃N₄-Bi) with a D-A₁-A₂ structure. Further modifications included the addition of reduced graphene oxide (RGO) to create a Ph-g-C₃N₄-Bi/RGO Schottky junction, which promoted efficient charge separation and transfer. The interaction between the Schottky junction and the D-A₁-A₂ system accelerated electron-hole pair separation, with RGO acting as a hole-extracting layer. Bismuth single atoms facilitated seamless charge transfer, enhancing both catalytic efficiency and stability. The combined piezoelectric and photocatalytic effects in Ph-g-C₃N₄-Bi/RGO significantly increased H₂O₂ production by accelerating charge carrier migration. This project highlighted the potential of piezoelectric photocatalysis for H₂O₂ synthesis, effectively merging photocatalysis and piezoelectric catalysis to produce a composite photocatalyst that improved charge carrier transfer at the molecular level.