Synthesis of stable and highly efficient Au@ZIF-8 for selective hydrogenation of nitrophenol
Miao Zhang1, Houang Long1, Qi Liu1
1Shandong Applied Research Center of Nanogold Technology (Au-SDARC), School of Chemistry & Chemical Engineering, Yantai University, Yantai 264005, People's Republic of China.
Abstract:
A series of nanoparticles (NPs) with different Au content was successfully encapsulated into metal organic framework ZIF-8 with highly porous structure through room-temperature crystallization. X-ray diffraction, Fourier transform infrared spectroscopy, N2 adsorption and transmission electron microscopy were carried out to characterize the obtained Au@ZIF-8 heterogeneous catalytic material comprehensively. Au NPs were dispersed uniformly in the ZIF-8 and the Au NP diameter was 5-6 nm. The crystal structure of ZIF-8 was unchanged when compared with that before Au loading. It was found that the Au content plays an important role in the hydrogenation reaction. The obtained Au@ZIF-8 exhibited high hydrogenation activity to nitrophenol and excellent selectivity to aminophenol. The recyclability of the Au@ZIF-8 catalysts showed excellent catalytic performance and great stability in the recycling reaction.
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