Atomic-layer Fe2O3-modified 2D porphyrinic metal-organic framework for enhanced photocatalytic disinfection through electron-withdrawing effect

In this work, an atomic-layer Fe 2 O 3 -modified two-dimensional (2D) porphyrinic metal-organic framework (MOF) was prepared (2D MOF-Fe 2 O 3 ), which exhibits unique interfacial electron-withdrawing effect via charge transfer pathways from Zn 2 O 8 and C-O bonds to Fe-O bonds. Concretely, the atomic-layer Fe 2 O 3 is deposited on 2D porphyrinic MOF (ZnTCPP) by atomic layer deposition technique to enhance the photocatalytic performance and the subsequent bacteria-killing efficacy. After 20 min light irradiation, the photocatalytic antibacterial efficacy of 2D MOF-Fe 2 O 3 can reach up to 99.9%. The underlying mechanism of enhanced photocatalytic activity is that the heterointerface between 2D MOF and Fe 2 O 3 can facilitate the transfer of lots of photogenerated electrons from 2D MOF to Fe 2 O 3 , where 2D MOF and Fe 2 O 3 act as electronic donator and receptor, respectively. This work provides an insight into developing highly effective photocatalysts by using electron-withdrawing modulator to optimize charge transfer pathway.