A kind of solid Fenton catalyst and its preparation method and application

Abstract

The invention discloses a solid Fenton catalyst and a preparation method and application thereof.The preparation method of the sigma-surface copper-graphitized nitrogen carbide complex modified copper and cobalt co-doped mesoporous alumina solid Fenton catalyst includes the following steps that 1, glucose and aluminum isopropoxide are added in water, stirring is performed to obtain a solution A; 2, an aqueous solution of copper salt and an aqueous solution of cobalt salt are dropwise added to the solution A, and stirring is performed to obtain a solution B; 3, the pH value of the solution B is regulated to be 5-5.5, and stirring is performed to obtain a solution C; the solution C undergoes standing, drying and calcinations, and then a solid D is obtained; 4, the solid D is added to an aqueous solution of urea so as to obtain a suspension E; moisture in the suspension E is evaporated to obtain a solid F; the solid Fenton catalyst can be obtained after the solid F undergoes drying and calcination.The solid Fenton catalyst has the very good removal effect on poisonous and harmful organic pollutants difficult to degrade under the neutral and weak-acid room temperature conditions and has very high hydrogen peroxide utilization rate.

Description

technical field [0001] The invention relates to a solid Fenton catalyst and its preparation method and application, belonging to the technical field of water treatment. Background technique [0002] In recent years, high-concentration and refractory toxic and harmful organic pollutants such as phenols, pharmaceuticals, pesticides, dyes, and endocrine disruptors have been continuously released into the water environment and persist, and seriously threaten human health through accumulation and enrichment. Life and health, so it is imminent to explore and develop low-cost, new and efficient technologies and methods for removing such pollutants. [0003] The Fenton reaction utilizes reduced metals to reduce H 2 o 2 produce hydroxyl radicals ( · OH), becoming an effective technology for removing refractory organic matter in water. However, there is a bottleneck problem in practical application: the homogeneous Fe 2+ The Fenton reaction needs to be carried out under the acidi...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of solid Fenton catalyst and its preparation method and application, and this solid Fenton catalyst is the copper-cobalt co-doped mesoporous alumina solid Fenton of sigma-surface copper-graphitization carbide nitrogen complex modification Catalyst (g-C 3 N 4 / CuCo-γ-Al 2 o 3 ), through the σ-Cu complex formed by graphitization of carbonized nitrogen and surface copper, the Cu on the surface of the catalyst + Reduce H 2 o 2 produce · OH, formed Cu 2+ σ-Cu 2+ -C 3 N 4 Reduction of electrons on π orbitals of arene-like rings to Cu in complexation + , while in C 3 N 4 Holes on the surface oxidize water molecules to form · OH, equivalent to consuming 1 H 2 o 2 yields 2 · OH, H 2 o 2 The utilization rate is close to 100%, which solves the problems of harsh reaction conditions, iron sludge generation, acid-base neutralization device, poor catalytic activity, and low utilization rate of hydrogen peroxide in the current Fenton system.

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