A cobalt-iron bimetallic catalytic material based on mof-74 and its preparation method and application

Abstract

The invention discloses a cobalt-iron bimetallic catalytic material based on MOF-74, a preparation method and application thereof. In the present invention, the metal salt and the organic ligand are added into the solvent in a molar ratio (1-5): 1, stirred uniformly and then transferred to a polytetrafluoroethylene reactor; wherein, the metal salt is composed of cobalt-containing metal salt and cobalt-containing Composed of iron metal salt, and the molar ratio of cobalt and iron in the metal salt is (1-9): (1-9); put the polytetrafluoroethylene reactor into an oven and react at 100-160 ° C for 12-72 hours, A cobalt-iron bimetallic catalytic material based on MOF‑74 was obtained. The cobalt-iron bimetallic catalytic material combined with persulfate can efficiently and deeply degrade various organic pollutants in water. The cobalt-iron bimetallic catalytic material-persulfate catalytic system based on MOF‑74 can be applied to deep purification of organic pollution sewage.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a cobalt-iron bimetallic catalytic material based on MOF-74 and its preparation method and application. Background technique [0002] In recent years, the number of synthetic organic chemicals has increased by millions or even tens of thousands each year, and these organic chemicals enter water bodies through various channels. Organic substances account for the vast majority of these organic chemicals, and these organic substances generally have the characteristics of stable structure, high ecological and environmental risks, carcinogenic, teratogenic and mutagenic, and difficult to effectively remove in traditional water treatment technologies. [0003] Based on the activation of persulfate to generate sulfate radicals (SO 4 - .) The advanced oxidation technology for treating water organic pollutants has received extensive attention in recent years. Compa...

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Problems solved by technology

In the homogeneous activation system, metals exist in the form of ions, and a large amount of metal ions remaining in the water after the reaction will cause new pollution; while in the heterogeneous catalytic oxidation system, metals usually exist in the form of oxides, However, the activation effect of traditional cobalt oxide and iron oxide on persulfate is not as good as that of the homogeneous system, and there are still ions overflowing into the solution during the activation process.