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Magnetic mesoporous carbon-supported cobalt catalyst and preparation method and application of catalyst

A mesoporous carbon and catalyst technology, which is applied in the field of magnetic immobilization catalysts and dye pollutants, can solve the problems of narrow pH adaptation range and large amount of sludge production, and achieves high free radical generation rate, low catalyst dosage, and high reaction efficiency. Simple and mild conditions

Inactive Publication Date: 2015-06-03
CHANGSHA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pH adaptation range of this chemical oxidation method is narrow, and the amount of sludge produced is large.

Method used

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  • Magnetic mesoporous carbon-supported cobalt catalyst and preparation method and application of catalyst
  • Magnetic mesoporous carbon-supported cobalt catalyst and preparation method and application of catalyst
  • Magnetic mesoporous carbon-supported cobalt catalyst and preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of preparation method of magnetic mesoporous carbon supported cobalt catalyst of the present invention, comprises the following steps:

[0039] S1, using template method to prepare magnetic mesoporous carbon, its specific preparation method is as follows:

[0040] S1-1: Weigh 0.1062 g of oxalic acid and 2.1650 g of ferric nitrate nonahydrate, put them in a small beaker, accurately pipette 20 ml of ethanol into the above small beaker, stir to dissolve oxalic acid and ferric nitrate nonahydrate, and obtain mixture.

[0041] S1-2: Weigh 2.0177g of SBA-15 into the crucible, quickly pour the mixed solution in step S1-1 into the crucible, and keep stirring the contents in the crucible; then take 3.0 mL of SBA-15 with a pipette Furfuryl alcohol was quickly added to the crucible under stirring conditions, and kept stirring until the material in the crucible was paste, then sealed with plastic wrap, put the crucible into an oven, and adjusted the oven temperature to 90 °...

Embodiment 2

[0052] An application of the magnetic mesoporous carbon-supported cobalt catalyst of Example 1 in the degradation of azo dyes (methylene blue is used in this example), and the specific application method includes the following steps:

[0053] (1) Prepare 100 mL of methylene blue solution with concentrations of 50 mg / L, 100 mg / L, 150 mg / L, 200 mg / L, 250 mg / L, and 300 mg / L, and add 0.920 mg / mL monopersulfate and 0.2 mg / mL magnetic mesoporous carbon-supported cobalt catalyst, and shake it for 45 minutes at a shaking speed of 150 r / min (the shaking speed is 150 r / min~200 r / min, and the shaking time is 30 min~45 min, respectively). implementable).

[0054] (2) After the shaking treatment is completed, take 5 mL of the treated methylene blue solution and add 2 mL of methanol solution to terminate the catalytic reaction. Under the action of an external magnetic field, the solution to be tested was separated, and the concentration of methylene blue was measured using a spectrophotom...

Embodiment 3

[0057] Example 3: Reuse of magnetic mesoporous carbon-supported cobalt catalysts.

[0058] In order to explore the reusability of magnetic mesoporous carbon-supported cobalt catalysts, the magnetic mesoporous carbon-supported cobalt catalysts treated with the methylene blue solution by the method of Example 2 were used as the research object, and were magnetically separated under the action of an external magnetic field. / L of HCl and ultrapure water to clean, and then again for the degradation concentration of 50 mg / L methylene blue solution 50 dmL, and repeated treatment of methylene blue dye solution 5 times according to the method of Example 2.

[0059] see Figure 4 , after the magnetic mesoporous carbon-supported cobalt catalyst of Example 1 was reused five times, the removal efficiency of the methylene blue dye solution still reached more than 99%.

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Abstract

The invention discloses a magnetic mesoporous carbon-supported cobalt catalyst and a preparation method and application of the catalyst. The magnetic mesoporous carbon-supported cobalt catalyst takes magnetic mesoporous carbon as a carrier, a cobalt ion is fixed into the magnetic mesoporous carbon through an isopyknic immersion method, and the weight percent of cobalt is 2.5%-4.5%. The preparation method particularly comprises the steps of preparing the magnetic mesoporous carbon by adopting a template method; dripping ultrapure water to the magnetic mesoporous carbon to obtain saturated water-absorbing capacity of the magnetic mesoporous carbon; then dripping a cobalt nitrate solution with saturated water-absorbing volume to the magnetic mesoporous carbon, immersing for 24-36 hours to obtain the magnetic mesoporous carbon immersed with cobalt; drying the magnetic mesoporous carbon immersed with the cobalt, grinding the dried magnetic mesoporous carbon into powder, and calcining to complete the preparation of the magnetic mesoporous carbon-supported cobalt catalyst. The magnetic mesoporous carbon-supported cobalt catalyst provided by the invention adopts a simple preparation method, can be separated by using a magnet after being used and can be repeatedly used, has high degradation efficiency on an azo dye and has no secondary pollution and can be used for degrading the azo dye.

Description

technical field [0001] The invention relates to the technical field of magnetically immobilized catalysts and dye pollutants, in particular to a magnetic mesoporous carbon-supported cobalt catalyst, and also relates to a preparation method of the magnetic mesoporous carbon-supported cobalt catalyst and an application in degrading azo dyes. Background technique [0002] Azo dye organic pollutants have the characteristics of refractory biodegradation, high toxicity and high chroma, and are important contents in the field of water pollution control. Among the many physical, chemical and biological treatment methods, the chemical oxidation method has the advantages of high treatment efficiency and wide application range, but it also has the disadvantage of secondary pollution. In recent years, advanced oxidation techniques based on catalytic reactions have attracted extensive attention for the treatment of azo dyes. The traditional Fenton advanced oxidation technology relies on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75C02F1/72C02F1/58
Inventor 庞娅李雪罗琨廖兴盛裴习君许第发王丽平
Owner CHANGSHA UNIVERSITY
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