Solid Fenton catalyst and preparation method and application thereof

A catalyst and solid technology, applied in the field of solid Fenton catalyst and its preparation, can solve the problems of harsh reaction conditions, low utilization rate of hydrogen peroxide, poor catalytic activity, etc., and achieves low cost, easy recovery and recycling, and high utilization rate. Effect

Active Publication Date: 2016-07-20
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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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

Method used

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  • Solid Fenton catalyst and preparation method and application thereof

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Embodiment 1

[0040] Embodiment 1, preparation and application experiment of solid Fenton catalyst

[0041] 1. Preparation

[0042] The copper-cobalt co-doped mesoporous alumina solid Fenton catalyst (g-C 3 N 4 / CuCo-γ-Al 2 o 3 ):

[0043] (1) Dissolve 7.2g of glucose into 100mL of deionized water, then add 8.4g of powdered aluminum isopropoxide, and mix and stir for 2 hours (rotating at 450 rpm) to form solution A;

[0044] (2) 0.5g copper chloride dihydrate (CuCl 2 2H 2 O) and 0.3g cobalt chloride hexahydrate (CoCl 2 ·6H 2 O) Dissolve in 10mL deionized water, and add the solution dropwise to solution A, fully stir (stirring time is 30 minutes, rotating speed is 450 rpm), to form solution B;

[0045] (3) The pH of solution B is gradually adjusted to 5 with aqueous hydrochloric acid (the mass percentage of hydrochloric acid is 1%), and the resulting solution is stirred in a water bath at 50° C. for 5 hours (rotating speed is 450 to 700 rpm) , to form solution C; solution C was lef...

Embodiment 2

[0075] Embodiment 2, prepare different g-C 3 N 4 σ-surface copper-graphitized nitrogen carbide complex-modified copper-cobalt co-doped mesoporous alumina solid Fenton catalysts.

[0076] Follow the steps below to prepare different g-C 3 N 4 g-C 3 N 4 / CuCo-γ-Al 2 o 3 :

[0077] (1) Dissolve 7.2g of glucose into 100mL of deionized water, then add 8.4g of powdered aluminum isopropoxide, and mix and stir for 2 hours (rotating at 450 rpm) to form solution A;

[0078] (2) 0.5g copper chloride dihydrate (CuCl 2 2H 2 O) and 0.3g cobalt chloride hexahydrate (CoCl 2 ·6H 2 O) Dissolve in 10mL deionized water, and add the solution dropwise to solution A, fully stir (stirring time is 30 minutes, rotating speed is 450 rpm), to form solution B;

[0079] (3) The pH of solution B is gradually adjusted to 5 with aqueous hydrochloric acid (the mass percentage of hydrochloric acid is 1%), and the resulting solution is stirred in a water bath at 50°C for 5 hours, and after standing at...

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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...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/72
CPCB01J27/24C02F1/722C02F1/725C02F2305/026
Inventor 胡春吕来张丽丽
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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