Z-scheme Cu2(OH)3F nanosheets-decorated 3D Bi2WO6 heterojunction with an intimate hetero-surface contact through a hydrogen bond for enhanced photoinduced charge separation and transfer

Abstract Enhancing the effective contact between heterogeneous interfaces and accelerating photo-generated charge separation is the focus of current photocatalysis research. Herein, a novel Z-scheme Cu2(OH)3F/Bi2WO6(CFO/BWO) heterojunctions with intimate hetero-surface contact were successfully synthesized via electronic coupling of the surface hydrogen bonds. The optimal proportion of 25%CFO/BWO displayed outstanding photocatalytic performance among the removal of tetracycline hydrochloride (TC-HCl). The excellent catalytic effect comes from the construction of the Z-Scheme heterojunction, which accelerates the separation of photogenerated carriers, and the linking of hydrogen bonds between different planes providing more charge transfer channels. Moreover, explored the main active substances in the reaction process and tested the stability of the as-prepared samples, and the charge transfer law and degradation mechanism in the Z-scheme heterojunction are discussed in detail. This work provides a new way to construct heterojunctions with more adequate hetero-surface contact and faster charge transfer capabilities.