Abstract
In this study, we developed a novel in situ growth scheme to construct
the Cu-MOFs@ZIF-9(Co) core-shell precursor material. The
Cu-MOFs@ZIF-9(Co) core-shell precursor was treated by low-temperature
phosphorization to obtain a Cu3P@CoP composite catalyst with a
self-supporting structure. Cu3P@CoP composite catalyst not only has a
hierarchical structure, but also builds a p-n heterojunction at the
interface. The unique structure and composition of Cu3P@CoP can promote
charge migration and provide large surface area and rich active sites to
drive water photolysis. In addition, by controlling the degree of
phosphation of Cu-MOFs@ZIF-9(Co) material and adjusting the ratio of Cu
and Co, it was found that the maximum hydrogen-producing activity of the
composite photocatalyst reaches 469.95 μmol, and it has a very excellent
cycle stability. The results of photoelectrochemical and fluorescence
tests showed that the proper conduction and valence band of Cu3P and CoP
formed a more effective path way for charge transfer.