(117ab) 2D Cu-Fetcpp MOF Assembled on Znti-LDH to Construct 2D/2D Direct Z-Scheme Heterojunction for Enhanced Photocatalytic CO2 Reduction

The artificial photocatalysis to convert CO₂ into renewable fuels has been of great significance in solving climate crisis and depletion of fossil fuels. The development of Z-scheme photocatalyst is crucial to achieve efficient photocatalytic CO₂ reduction. Herein, a 2D/2D Z-scheme ZnTi-LDH/Cu-FeTCPP MOF heterojunction is designed for photocatalytic CO₂ reduction without photosensitizer and organic sacrificial agent. The optimized ZnTi-LDH/Cu-FeTCPP MOF photocatalyst exhibits attractive activity with a CO yield of 37.80 μmol•g^-1, which is 28 and 26 times higher than those of ZnTi-LDH and Cu-FeTCPP MOF, respectively. The improved photocatalytic activity is attributed to the contact interface of Cu-FeTCPP MOF and ZnTi-LDH that generates internal electric field and forms a direct Z-scheme heterostructure to separate photogenerated carriers more efficiently and promote redox reactions. Additionally, cycling tests confirm its favorable stability. This study strategies designing effective LDHs/MOFs Z-scheme heterojunction photocatalysts toward CO₂ photocatalytic reduction.