Facile Preparation of Hydrogen-Bonded Organic Framework/Cu 2 O Heterostructure Films via Electrophoretic Deposition for Efficient CO 2 Photoreduction.

Photocatalytic CO 2 reduction is one of the most cost-effective and environmentally friendly techniques of converting CO 2 into high-value compounds and/or fuels. However, the performance of most current photocatalytic CO 2 reduction catalysts is less than satisfactory for practical applications. Here, we synthesized a heterogeneous structure by integrating Cu 2 O and a porphyrin hydrogen-bonded organic framework (PFC-45), which was then fabricated into a thin-film catalyst on carbolic paper (CP) using a facile electrophoretic deposition technology. With improved electron-hole separation efficiency and visible-light-harvesting ability, this film (PFC-45/Cu 2 O@CP) significantly enhanced CO 2 -to-CO photoreduction, exceeding 2.4 and 3.2 times that of PFC-45@CP and PFC-45/Cu 2 O particles, respectively. Remarkably, PFC-45/Cu 2 O@CP also exhibited high selectivity (99%) and outstanding activity (11.81 μmol g -1 h -1 ) for photocatalytic CO 2 reduction in pure water without any sacrificial agent. This work demonstrates a new strategy to design photocatalysts for efficient CO 2 reduction.