ZnO@In2O3 Core–Shell Heterojunctions Constructed With ZIF-8 and MIL-68 (In) for Improving Photogenerated Carrier Transfer Process

Abstract

The realization of fast carrier transport can effectively enhance photocatalytic performance. A core–shell structure of ZnO and In₂O₃ is successfully constructed by using MIL-68 (In) and ZIF-8 as a substrate, forming a heterojunction. This MOF-derived core–shell heterojunction inherits the advantages of ZIF-8, with pores facilitating carriers transfer to the surface for reactions and a large specific surface area providing more active sites. This Z-scheme heterojunction of ZnO and In₂O₃ can effectively separate and improve the utilization of photogenerated carriers. The well-designed interface of the core–shell structure achieves the rapid transfer of photogenerated carriers. The photocatalytic degradation capability of ZnO@ In₂O₃ is enhanced by the synergistic effect of Z-scheme heterojunction and core–shell structure. This work provides insight into the investigation of constructing core–shell heterojunctions.