Citation: Kai Fan, Zhiliang Jin, Hong Yuan, Hongyan Hu, Yingpubi. Construction of CuO-modified zeolitic imidazolate framework-9 for photocatalytic hydrogen evolution[J]. Chinese Journal of Catalysis, ;2017, 38(12): 2056-2066. doi: 10.1016/S1872-2067(17)62969-3 shu

Construction of CuO-modified zeolitic imidazolate framework-9 for photocatalytic hydrogen evolution

Kai Fan ^a, ,
Zhiliang Jin ^a ,
Hong Yuan ^a ,
Hongyan Hu ^b ,
Yingpubi ^b

a School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan 750021, Ningxia, China;
b State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China

Received Date: 1 October 2017
Revised Date: 31 October 2017

Fund Project: This work was supported by the National Natural Science Foundation of China (21433007, 21603274, 41663012) and the Ningxia Low-Grade Resource High Value Utilization and Environmental Chemical Integration Technology Innovation Team Project, North Minzu University.

An efficient CuO-modified zeolitic imidazolate framework-9 (ZIF-9) photocatalyst is successfully prepared at room temperature under mild conditions. It is observed that the ZIF-9/CuO photocatalyst is effective for H₂ generation under visible light with sacrificial agent conditions. When the CuO is introduced, the photocatalytic properties of ZIF-9 are greatly improved and when the content of CuO is 40%, the photocatalytic activity reaches a maximum of 78.74 μmol after 5 h. This results from the 200-300 nm cube structure of ZIF-9 being able to adsorb more dye molecules and the CuO, which connects with ZIF-9, greatly improving the electronic transmission efficiency. Moreover, the interaction between the dye molecule Eosin Y (EY) and the catalyst is also studied by transient fluorescence spectroscopy. A series of characterizations, such as SEM, TEM, XPS, XRD, UV-vis, FTIR, transient fluorescence and photocurrent, are conducted, and the results are in good agreement with the experimental result. In addition, the possible reaction mechanism over EY-sensitized ZIF-9/CuO under visible light irradiation is proposed.
- ZIF-9,
- CuO,
- Eosin Y,
- Sensitized pathway,
- Hydrogen evolution,
- Reaction optimization
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