Polyoxometalate-based frameworks, as a kind of material combined both the advantages of oxygen-rich polyoxometalates (POMs) and porous metal-organic frameworks (MOFs) within one single system, could serve as potential photocatalysts with diverse structure features. This review focus on the recent development based on the POM-based frameworks along with their construction strategies and applications in various areas of photocatalysis, mainly including water splitting, CO₂ reduction, organic synthesis and also the selective coupling reactions.

Abstract

Polyoxometalate-based frameworks, as a kind of material constructed by polyoxometalates (POMs), metal ions or clusters, organic ligands, are combined both the advantages of oxygen-rich POMs and porous metal-organic frameworks (MOFs) within one single system. This integration greatly expands their potential applications compared to the individual POMs or MOFs. Particularly for photocatalysis, the narrow light absorption range of the typical POMs units in the ultraviolet region hinders their extensive uses as visible-light-driven photocatalysts. However, the incorporation of photoactive units into POMs-based frameworks can be considered as an effective approach to overcome this limitation. In this paper, we review selected examples of recent progress based on the POM-based frameworks along with their construction strategies and applications in various areas of photocatalysis, mainly including water splitting, CO₂ reduction, organic synthesis and also the selective coupling reactions.