Preparation of Silicalite-1 Encapsulated Au Nanoparticles Catalyst and Selective Reduction of Nitrobenzene Compounds
Metal-supported catalysts have been widely used and studied in the field of industrial catalysis.However,the accumulation and loss of metal active sites during reaction has been a longstanding pain point for this type of catalytic material.In this paper,Au nanoparticles were completely encapsulated in Silicalite-1 by a simple and effective synthesis method with Silicalite-1 as the carrier and Au nanoparticles as the active center.This method can effectively inhibit the loss of Au nanoparticles and improve the stability of the catalyst.The results of SEM,TEM,XRD,XPS,N2 physical adsorption and desorption proved the encapsulation structure of the catalyst.The catalysts exhibited excellent catalytic activity and high cycle stability for the reduction of nitro compounds,greatly impro-ving the prospect of industrial application.
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