Robust Ti- and Zr-Based Metal-Organic Frameworks for Photocatalysis

Photocatalysis represents a promising pathway for the direct conversion of solar energy to valuable chemical energy. Metal-organic frameworks （MOFs）, which are constructed from metal/metal clusters interconnected with organic ligands, have recently emerged as a promising candidate in this field. Among various MOFs, Ti- and Zr-based MOFs have gained intensive interest in photocatalysis due to their relation to the commonly used photo- catalyst （TiO2） and high stability. In this review, we summarized the recent applications of Ti- and Zr-based MOFs in solar fuel production, including water reduction and oxidation, CO2 reduction and organics syntheses. Strategies to improve the MOF-based photocatalysis via improving their light absorption and facilitate the charge separation were also demonstrated. Finally, opportunities and challenges facing the MOFs-based photocatalysis, especially the Ti- and Zr containing MOFs were addressed.