Ultrafast Carrier Migration via Z‐Scheme Heterojunction: Ultrathin Carbon Nitride/Ni‐Modified Ti‐MOF for Photocatalytic H ₂ Generation

ABSTRACT To enhance charge carrier separation and migration efficiency during photocatalytic hydrogen evolution, thereby improving overall photocatalytic performance, a Z‐Scheme heterojunction of Ti‐Ni bimetallic MOF/Ultrathin g‐C 3 N 4 was prepared via high‐temperature annealing method. As a photocatalyst, the composite was applied in the hydrogen evolution. The hydrogen production yield reached 21.42 mmol·g −1 within 6 h upon exposure to simulated sunlight, the average hydrogen evolution was measured as about 3.75 mmol h −1 g −1 , which was 2.63‐fold enhancement over that of PCN. The hydrogen generation rate of the heterojunction maintained well within a 4‐cycle test, the average H 2 evolution was more than 3.60 mmol h −1 g −1 . The prepared heterojunction exhibits high catalytic performance and good stability in the domain of photocatalysis of H 2 generation, which provide a novel alternative for subsequent investigations into solar‐driven hydrogen evolution.