Inventors: He CY, Yu D, Wei ST
Patent Title: Preparation method of core-shell pseudo template imprinted magnetic nano-catalyst for use in degradation of Congo red
Publication date: 2014
Publication number: CN104128207

Abstract: The invention discloses a preparation method of a core-shell pseudo template imprinted magnetic nano-catalyst for use in degradation of Congo red. The method comprises the following steps: preparing Fe3O4 nanoparticles; preparing Fe3O4@SiO2 magnetic nanoparticles; preparing Fe3O4@SiO2@TiO2 core-shell nanoparticles; and preparing Fe3O4@SiO2@TiO2@MIP core-shell imprinted nanoparticles. The imprinted catalyst plays a remarkable role in catalyzing degradation of the Congo red, and can be easily and rapidly separated from a solution through an external magnetic field to realize environment-friendly and low-cost degradation of polluting dyes. As proved by an experimental result, the catalyst has a high degradation catalyzing rate without illumination, and the first-order reaction rate coefficient of a catalytic reaction is 0.09615min<-1>.; After the catalyst is recycled repeatedly, the catalytic capability does not change remarkably. The catalyst has a good application prospect in degradation catalyzing of the Congo red in dyeing wastewater.
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