Boosting H2 Production over C60‐Mediated NH2‐MIL‐125(Ti)/Zn0.5Cd0.5S S‐Scheme Heterojunction via Enhanced Interfacial Carrier Separation

Abstract Improving greatly the separation efficiency of interfacial charge carrier is a major challenge in photocatalysis. Herein, a new class of C 60 ‐mediated NH 2 ‐MIL‐125(Ti)/Zn 0.5 Cd 0.5 S S‐scheme heterojunction with enhanced interfacial charge carrier separation is designed and synthesized. The constructed S‐scheme heterojunction thermodynamically favors photocatalytic H 2 evolution because of the large driving force resulting from its strong redox abilities. As a consequence, the optimum proportion of C 60 ‐mediated NH 2 ‐MIL‐125(Ti)/Zn 0.5 Cd 0.5 S S‐scheme heterojunction displays comparable H 2 evolution activity with a rate of 7825.20 µmol h −1 g −1 under visible light irradiation, which is about 93.05 times, 6.38 times and 2.65 times higher than that of 2% C 60 /NH 2 ‐MIL‐125(Ti), Zn 0.5 Cd 0.5 S and 45% NH 2 ‐MIL‐125(Ti)/Zn 0.5 Cd 0.5 S, and outperforms the majority of the previously reported MOFs‐based photocatalysts. Spectroscopic characterizations and theory calculations indicate that the S‐scheme heterojunction can powerfully promote the separation of photogenerated carriers. This work offers a new insight for future design and development of highly active MOFs‐based photocatalysts.