Preparation method and application of Fenton-like catalyst based on adsorption encapsulation strategy

Abstract

The invention discloses a preparation method of a Fenton-like catalyst based on an adsorption packaging strategy and application of the catalyst to degradation of organic pollutants, FeCl2. 4H2O is added into DMF to obtain a solution A, DHTA is added into a mixed solution of DMF, water and ethanol to obtain a solution B, the solution A and the solution B are mixed and subjected to a hydrothermal reaction, and iron-based MOF is obtained; the preparation method comprises the following steps: adding MOF and Co (NO3) 2.6 H2O into ethanol, and continuously stirring to enable Co ions to reach adsorption equilibrium on the surface of the MOF and migrate into a frame structure of the MOF; and calcining the obtained material to obtain the Co-encapsulated Fenton-like catalyst. The adsorption-packaging strategy enables the catalyst to form a highly dispersed CoFe2O4 / CoO heterostructure, the active site density is remarkably increased, metal oxide agglomeration and metal ion leaching are inhibited at the same time, and the catalyst has the characteristics of high catalytic activity, high stability and wide application range.

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