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Magnetic micropore-rich carbon-based cobalt catalyst based on space confinement effect as well as preparation method and application of magnetic micropore-rich carbon-based cobalt catalyst

A technology of carbon-based cobalt catalysts and cobalt catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, etc., can solve the problem of low reaction rate of heterogeneous solid catalysts problems, to achieve the effect of avoiding secondary risk problems, improving catalytic reaction efficiency, and improving degradation or separation efficiency

Pending Publication Date: 2022-03-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the low reaction rate of heterogeneous solid catalysts in water is an important technical problem. In addition, how to quickly and efficiently separate the catalyst suspended in water is also an important problem in practical application.

Method used

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  • Magnetic micropore-rich carbon-based cobalt catalyst based on space confinement effect as well as preparation method and application of magnetic micropore-rich carbon-based cobalt catalyst
  • Magnetic micropore-rich carbon-based cobalt catalyst based on space confinement effect as well as preparation method and application of magnetic micropore-rich carbon-based cobalt catalyst
  • Magnetic micropore-rich carbon-based cobalt catalyst based on space confinement effect as well as preparation method and application of magnetic micropore-rich carbon-based cobalt catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for preparing a magnetic microporous carbon-based cobalt catalyst based on a spatial confinement effect, comprising the following steps:

[0041] Step 1, making a solution of divalent cobalt salt, 2-methylimidazole and polyvinylpyrrolidone, mixing and stirring, and synthesizing a modified cobalt-based metal-organic framework material by a hydrothermal method;

[0042] Step 2, putting the modified cobalt-based metal-organic framework material into a tube furnace for carbonization to obtain a porous carbon-based cobalt catalyst;

[0043] Step 3, using an acid solution to etch the porous carbon-based cobalt catalyst to obtain a magnetic microporous carbon-based cobalt catalyst based on the spatial confinement effect.

[0044] Wherein, the divalent cobalt salt includes cobalt nitrate hexahydrate or cobalt chloride hexahydrate, the mass ratio of the divalent cobalt salt to 2-methylimidazole is 1:11-12, and the acid solution includes nitric acid solution or hydrochlo...

Embodiment 2

[0057] The difference from Example 1 is that in this example, 2.0 g of the modified cobalt-based metal-organic framework material was placed in a nitrogen atmosphere, carbonized at a temperature of 700 ° C for 2 hours, and the heating condition was 10 ° C / min, and the whole process was placed in nitrogen In the ambient environment, the porous carbon-based cobalt catalyst was obtained after cooling to room temperature.

[0058] The rest are the same as in Embodiment 1, and will not be repeated here.

Embodiment 3

[0060] The difference from Example 1 is that in this example, 2.0 g of the modified cobalt-based metal-organic framework material was placed in a nitrogen atmosphere, and carbonized at a temperature of 800 ° C for 2 hours. The heating condition was 10 ° C / min, and the whole process was placed in nitrogen In the ambient environment, the porous carbon-based cobalt catalyst was obtained after cooling to room temperature.

[0061] The rest are the same as in Embodiment 1, and will not be repeated here.

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Abstract

The invention discloses a magnetic micropore-rich carbon-based cobalt catalyst based on a space confinement effect and a preparation method and application thereof, and the preparation method comprises the following steps: step 1, preparing positive bivalent cobalt salt, 2-methylimidazole and polyvinylpyrrolidone into a solution, mixing and stirring, and synthesizing a modified cobalt-based metal organic framework material by adopting a hydrothermal method; 2, the modified cobalt-based metal organic framework material is put into a tubular furnace to be carbonized, and a porous carbon-based cobalt catalyst is obtained; and step 3, etching the porous carbon-based cobalt catalyst by using acid to obtain the magnetic micropore-rich carbon-based cobalt catalyst based on the spatial confinement effect. The prepared catalyst can effectively activate persulfate and efficiently remove dye and phenol organic pollutants, meanwhile, in the sewage treatment process, the mass transfer process can be effectively promoted, then the pollutant degradation or separation efficiency is improved, and in addition, the catalyst can be recycled through a magnet after sewage treatment is completed.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a magnetic microporous carbon-based cobalt catalyst based on the spatial confinement effect and its preparation method and application. Background technique [0002] With the rapid development of industry, a large number of refractory organic pollutants are inevitably discharged into water bodies, causing serious water pollution and potential harm to humans and animals. How to quickly and effectively remove refractory organic pollutants in water is an environmental issue. hot issues in the field. Most water-soluble azo dyes contain benzene rings and are stable in nature. Traditional biological treatment methods are difficult to achieve satisfactory results. However, organic pollutants such as acetaminophen are difficult to achieve good results by using traditional biological treatment techniques because of their refractory biodegradability. [0003] The advanced oxidat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75C02F1/72C02F101/30C02F101/34C02F101/38
CPCB01J23/75C02F1/725C02F1/722C02F2101/308C02F2101/345C02F2101/30C02F2101/40C02F2209/06C02F2209/44B01J35/33
Inventor 赵迎新邱潇洁李晨曦宋延星金若彤
Owner TIANJIN UNIV
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