Abstract
Reasonable control of the interface of semiconductor materials is one of the potential strategies to develop efficient solar photocatalysts for hydrogen production. In the S-scheme heterojunction, the valid electrons and holes are preserved and the meaningless photocarriers are reorganized. Using the strategy of band structure matching and morphology regulation, we tightly coupled ZIF-67 with NiAl LDH by electrostatic self-assembly method, and constructed ZIF-67@NiAl LDH composite catalyst with S-scheme heterojunction structure. In addition to improving the interfacial charge transfer efficiency of catalyst, the design of S-scheme charge transfer path can enhance the redox capacity of catalyst to a certain extent. The design of two-dimensional/one-dimensional spatial structure increases the contact interface between ZIF-67 and NiAl LDH, which is conducive to the production of active sites. In addition, the introduction of P accelerates the carrier separation efficiency. Finally, phosphating ZIF-67@NiAl LDH catalyst showed excellent hydrogen production activity (2.99 mmol g-1h−1) with a 5 W LED as light source and eosin as a photosensitizer. This work provides experimental support and theoretical basis for the design of photocatalysts for efficient catalytic hydrogen evolution involving sacrificial reagents.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have