Hydrogen production with ultrahigh efficiency under visible light by graphene well-wrapped UiO-66-NH2 octahedrons

作者：Wang, Yang^*; Yu, Yu; Li, Rui; Liu, Huijin; Zhang, Wei; Ling, Lianjie; Duan, Wubiao; Liu, Bo^*

来源：Journal of Materials Chemistry A, 2017, 5(38): 20136-20140.

DOI：10.1039/c7ta06341e

• METAL-ORGANIC FRAMEWORKS
• ARTIFICIAL PHOTOSYNTHESIS
• WATER
• SEMICONDUCTOR
• EVOLUTION
• PHOTOCATALYSTS
• HYBRID
• TIO2
• H-2
• NANOARCHITECTURES

An efficient catalytic system and surface modification are considered as two important routes for the enhancement of MOF-based photocatalytic properties. Herein, we report a significant improvement in hydrogen production efficiency with MOFs achieved through both the abovementioned routes. With the newly developed highly efficient TEOA-ErB system, H-2 generation rate on UiO-66-NH2 octahedrons could amount to 21.2 mmol h(-1) g(-1). Then, based on this system, the interaction of the UiO-66-NH2 surface with graphene was judiciously controlled. The prepared graphene well-wrapped UiO-66-NH2 octahedrons, in which every face was in contact with graphene, led to the highest H-2 production efficiency of 41.4 mmol h(-1) g(-1). These findings suggest that MOFs could potentially evolve into highly efficient photocatalysts when incorporated into a proper system and further revealed that modifications on the surface of MOFs might result in a better inhibition of electron-hole recombination in H-2 generation.

• 出版日期2017-10-14
• 单位北京交通大学