In-situ-doped cobalt fenton catalyst as well as synthetic method and application thereof

Abstract

The invention discloses an in-situ-doped cobalt fenton catalyst as well as a synthetic method and application thereof. The synthetic method of the in-situ-doped cobalt fenton catalyst comprises the following steps: adding a cobalt source into a precursor; and then synthesizing the in-situ-doped cobalt fenton catalyst through an in-situ doping roasting process, wherein the precursor is tripolycyanamide, cyanamide, dicyandiamide or urea. The in-situ-doped cobalt fenton catalyst (in-situ-Co-g-C3N4) disclosed by the invention shows a classic carbon nitride sheet laminated structure, due to formation of a C-O-Co bond in the structure, formation of a double-reaction center is promoted, H2O2 and pollutants are separately reduced and decomposed in an electron-rich center and an electron-deficientcenter, so that the problem of loss of active ingredients caused by self-oxidative reduction of metal ions is avoided. The in-situ-Co-g-C3N4 has a good removal effect on novel organic pollutants whichare difficultly degraded under a neutral condition, and in a process of degrading the pollutants, the in-situ-Co-g-C3N4 has strong ability of activating H2O2 and also has good stability, and moreover, a dissolution ratio of cobalt ions is low.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an in-situ doped cobalt-based Fenton catalyst capable of catalytically degrading organic pollutants, and a synthesis method and application thereof. Background technique [0002] Water is one of the indispensable basic substances for the survival of all life on earth, human life and production. In recent years, human life and production activities have led to the production of various new organic pollutants, such as pesticides, phenols, medicines, dyes, insecticides and endocrine disruptors, etc., which have caused great harm to the natural water environment. pollution. After these new organic pollutants enter the environment, they are difficult to degrade and persist for a long time. They can be transported in various ways and affect the regional and global environment. They will eventually seriously affect human health through the enrichment of the food chain. Due to the compl...

AI Technical Summary

Problems solved by technology

The biggest feature of the heterogeneous Fenton catalyst developed on the basis of the classical Fenton reaction is the solidification of metal ions. Although it makes up for the shortcomings of the classical Fenton reaction to a certain extent, it still does not substantially break away from the classical Fenton reaction. In the homogeneous Fenton reaction, the redox of the metal species occurs at a single site, but there are still problems such as poor stability, low utilization rate of hydrogen peroxide, and large dissolution of metal ions.

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