A MOF-on-MOF composite enhances visible light photocatalytic CO2 reduction performance

Abstract

Photocatalytic CO₂ reduction (Pc-CO₂RR) offers one way to covert CO₂ into useful chemicals. MOF-on-MOF materials can be made for Pc-CO₂RR with instinct performance. This work provides a family of MOF-on-MOF photocatalysts, IEF-11@Zr-TCPP for Pc-CO₂RR via the gas-solid mode. Owing to the appropriate synergistic effect between two MOF components, IEF-11@Zr-TCPP displayed high CO evolution rates of 201.71 (in pure CO₂) or 245.34 μmol g⁻¹ h⁻¹ (in diluted CO₂) respectively, without auxiliary photosensitizers or sacrificial agents. This study helps to discover new MOF based photocatalytic systems that collect solar energy and exhibit high catalytic activity with no cocatalyst.