Preparation and Properties of Carbon Cage Supported Nickel-Based Magnetic Catalyst Ni@Cage-C
In this paper,a non-noble metal magnetic catalyst Ni@Cage-C was successfully prepared.By using ZIF-67 as the precursor,carbon cage(Cage-C)nanoparticles with uniform size were obtained by means of encapsulation-etching-carbonization strategy.Then the active metal nickel was supported by Cage-C in liquid phase.The catalytic reduction of p-nitrophenol to p-aminophenol was employed to evaluate the catalytic performance of Ni@Cage-C.The results indicated that the Ni@Cage-C catalyst prepared under optimized conditions had a carbon cage coated nickel structure with an average particle size of about 550 nm.When it was used for the reduction of p-nitrophenol,its comprehensive catalytic performance was obviously better than the reference catalyst(Raney-Ni),with the mass reaction rate constant kM of 6.11 mg-1·min-1,the catalytic efficiency of 98.87%,and the catalytic conversion rate maintaining more than 85%after 10 cycles of the catalytic reaction.
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