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Hollow amorphous cobalt carbide Fenton catalyst, and preparation method and application thereof

A carbide-based, amorphous technology, applied in the field of hollow amorphous cobalt carbide-based Fenton catalyst and its preparation, can solve the problems of low singlet oxygen generation efficiency and the like

Active Publication Date: 2021-07-06
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the general Fenton system, the efficiency of singlet oxygen generation is low

Method used

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  • Hollow amorphous cobalt carbide Fenton catalyst, and preparation method and application thereof
  • Hollow amorphous cobalt carbide Fenton catalyst, and preparation method and application thereof
  • Hollow amorphous cobalt carbide Fenton catalyst, and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1: First take 80mL of isopropanol, add 0.75mmol of cobalt nitrate hexahydrate, 0.25mmol of glucose monohydrate, and 16mL of glycerin in sequence, and stir the mixed solution for 0.5h at a speed of 600-800rpm to obtain a dark purple solution.

[0035] Step 2: Transfer the above dark purple solution to a 150mL reactor, react at 180°C for 6h, wash the product three times with water and ethanol, and then dry it at 60°C for 12h to obtain hollow amorphous cobalt carbides Co / C-3 Fenton catalyst.

[0036] The above-mentioned Co / C-3 catalyst has been characterized by scanning and transmission electron microscopy for its morphology and element distribution. It can be seen that it has an obvious hollow structure and a large number of wrinkled nanosheets on the surface. The three elements of cobalt, carbon, and oxygen are evenly distributed; and the ratio is 12.45:40.34:47.21. The amorphous phase state can be confirmed by X-ray diffractometer, and cobalt does not form obvious...

Embodiment 2

[0039] Step 1: Take 80mL of isopropanol, add 0.25mmol of cobalt nitrate hexahydrate, 0.25mmol of glucose monohydrate, and 16mL of glycerin in sequence, and stir the mixed solution for 0.5 hours at a speed of 600-800rpm to obtain a lavender solution.

[0040] Step 2: Transfer the above lavender solution to a 150mL reactor, react at 180°C for 6h, wash the obtained product three times with water and ethanol, and then dry at 60°C for 12h to obtain hollow amorphous cobalt carbide Co / C-1 Fenton catalyst.

[0041] The above-mentioned Co / C-1 catalyst was characterized by scanning and transmission electron microscopy for its morphology and element distribution. It can be seen that it has an obvious hollow structure, the surface is relatively smooth, and the three elements of cobalt, carbon, and oxygen are evenly distributed; and the ratio is 8.89:51.15:39.96 . Its amorphous phase state can be confirmed by X-ray diffractometer. Fourier transform infrared spectroscopy shows that there ...

Embodiment 3

[0044] Step 1: First take 80mL of isopropanol, add 0.50mmol of cobalt nitrate hexahydrate, 0.25mmol of glucose monohydrate, and 16mL of glycerin in sequence, and stir the mixed solution for 0.5h at a speed of 600-800rpm to obtain a purple solution.

[0045] Step 2: Transfer the above purple solution to a 150mL reactor, react at 180°C for 6h, wash the obtained product three times with water and ethanol, and then dry at 60°C for 12h to obtain a hollow amorphous cobalt carbide Co / C-2-like Fenton catalyst.

[0046] The above-mentioned Co / C-2 catalyst was characterized by scanning and transmission electron microscopy for its morphology and element distribution. It can be seen that it has an obvious hollow structure and a small amount of wrinkled nanosheets on the surface. The three elements of cobalt, carbon, and oxygen are evenly distributed; and the ratio is 10.33:41.49:48.18. Its amorphous phase state can be confirmed by X-ray diffractometer, and cobalt has no obvious crystalli...

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Abstract

The invention discloses a hollow amorphous cobalt carbide Fenton catalyst capable of simply, conveniently, economically and efficiently producing singlet oxygen, and a preparation method thereof. The preparation method comprises the following specific steps: stirring cobalt nitrate hexahydrate, dextrose monohydrate, glycerol and isopropanol until the materials are dissolved into a uniform solution; and transferring the mixture into a reaction kettle, and carrying out a high-temperature reaction to obtain the hollow amorphous cobalt carbide rich in nanosheets on the surface. The prepared hollow amorphous cobalt carbide is used as a catalyst to be applied to a heterogeneous Fenton advanced oxidation reaction, singlet oxygen can be efficiently produced, and antibiotic pollutants in water can be efficiently degraded in a complex water sample. The catalyst has the advantages of low raw material cost and simple preparation steps, overcomes the defect that the pH needs to be adjusted to be acidic in the conventional Fenton reaction, and is beneficial to practical application.

Description

technical field [0001] The invention relates to a simple, economical and efficient hollow amorphous cobalt carbide-based Fenton catalyst for producing singlet oxygen and a preparation method thereof. The catalyst can efficiently activate hydrogen peroxide and generate singlet oxygen, which can be realized in complex water samples The efficient degradation of tetracycline antibiotics belongs to the technical field of environmental protection and water treatment. Background technique [0002] Antibiotics are a class of secondary metabolites produced by microorganisms or higher animals and plants with anti-pathogen and other activities, and are widely used in the fields of medical treatment and aquaculture. The metabolism rate of antibiotics in humans and animals is extremely low, and most of them are excreted in the form of original drugs (more than 70%) or active metabolites. However, there are currently no environmental quality and discharge standards for antibiotics, result...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J27/22B01J35/02B01J35/08B01J35/10C02F1/72C02F101/38
CPCB01J23/75B01J27/22C02F1/722C02F1/725C02F2101/38C02F2305/026B01J35/51B01J35/617B01J35/40B01J35/647B01J35/615
Inventor 孔令涛洪沛东刘锦淮
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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