1. Enhanced Visible-Light-Driven Hydrogen Production through MOF/MOF Heterojunctions
- Author
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Kampouri, Stavroula, Ebrahim, Fatmah M., Fumanal, Maria, Nord, Makenzie, Schouwink, Pascal A., Elzein, Radwan, Addou, Rafik, Herman, Gregory S., Smit, Berend, Ireland, Christopher P., and Stylianou, Kyriakos C.
- Subjects
heterojunctions ,hydrogen production ,stability ,metal-organic frameworks ,photocatalysis - Abstract
A strategy for enhancing the photocatalytic performance of MOF- based systems (MOF: metal-organic framework) is developed through the construction of MOF/MOF heterojunctions. The combination of MIL-167 with MIL-125-NH2 leads to the formation of MIL-167/MIL-125-NH2 heterojunctions with improved optoelectronic properties and efficient charge separation. MIL-167/MIL-125-NH2 outperforms its single components MIL-167 and MIL-125-NH2, in terms of photocatalytic H-2 production (455 versus 0.8 and 51.2 mu mol h(-1) g(-1), respectively), under visible-light irradiation, without the use of any cocatalysts. This is attributed to the appropriate band alignment of these MOFs, the enhanced visible-light absorption, and long charge separation within MIL-167/MIL-125-NH2. Our findings contribute to the discovery of novel MOF-based photocatalytic systems that can harvest solar energy and exhibit high catalytic activities in the absence of cocatalysts.