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A graphitized carbon-supported nano-zero-valent iron material and its preparation method and application

A nano-zero-valent iron and graphitized carbon technology, which is applied in chemical instruments and methods, chemical/physical processes, oxidized water/sewage treatment, etc., can solve the large-scale industrial production of unfavorable materials, complex operation process and synthesis conditions, waste water Deal with problems that need to be further improved to achieve the effect of increasing stability and reusability, increasing stability and durability, and easy adsorption

Active Publication Date: 2021-11-02
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the operation process and synthesis conditions of the fine preparation method are complicated, which is not conducive to the large-scale industrial production of materials.
[0004] Chinese patent application CN 106044921 A provides a method for preparing carbon sphere-supported nano-zero-valent iron composite materials, which includes (1) preparing carbon spheres containing hydrophilic functional groups (-OH, -COOH) by hydrothermal method; (2) Chelate iron ions and functional groups by soaking; (3) Finally, drop potassium borohydride or sodium borohydride solution into the mixed solution of carbon spheres with iron ions, and form carbon spheres to support nano-zero valence through strong reduction Iron composite materials; although this preparation method solves the problem of nano-zero-valent iron agglomeration to a certain extent, the disadvantage of preparing nano-carbon spheres by glucose hydrothermal method is that its particle size control range is limited, and the particle size distribution of the obtained material is not uniform. The performance is affected, resulting in the efficiency of wastewater treatment to be further improved

Method used

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  • A graphitized carbon-supported nano-zero-valent iron material and its preparation method and application
  • A graphitized carbon-supported nano-zero-valent iron material and its preparation method and application
  • A graphitized carbon-supported nano-zero-valent iron material and its preparation method and application

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Effect test

Embodiment 1

[0045] A preparation method of graphitized carbon-supported nanometer zero-valent iron material, comprising the following steps:

[0046] (1) Ferrous acetate and 2-aminoterephthalic acid are placed in a ball mill reactor with a mass ratio of 3:1;

[0047] (2) Add a zirconia grinding medium with a diameter of 5 mm to the ball mill reactor, adjust the rotating speed of the ball mill to 300 rpm, add 1 mL / g of ethylene glycol solution and grind for 5 hours to obtain a polymer material;

[0048] (3) Put the polymer material in a tube furnace and heat it up to 800°C at a heating rate of 10°C / min under a nitrogen atmosphere; pyrolyze for 3 hours and cool to obtain graphitized carbon-loaded nano-zero-valent iron material .

Embodiment 2

[0050] A preparation method of graphitized carbon-supported nanometer zero-valent iron material, comprising the following steps:

[0051] (1) Ferric sulfate and 2-aminoterephthalic acid are placed in a ball mill reactor at a mass ratio of 2:1;

[0052] (2) Add an alumina grinding medium with a diameter of 5 mm to the ball mill reactor, adjust the rotating speed of the ball mill to 350 rpm, add 1 mL / g of dimethylformamide solution and grind for 4 hours to obtain a polymer material;

[0053] (3) Put the polymer material in a tube furnace and heat it to 900°C at a heating rate of 10°C / min in an argon atmosphere; pyrolyze it for 3 hours and cool it down to obtain graphitized carbon-supported nano-zero-valent iron Material.

Embodiment 3

[0055] A preparation method of graphitized carbon-supported nanometer zero-valent iron material, comprising the following steps:

[0056] (1) ferric chloride and 2-aminoterephthalic acid are placed in a ball mill reactor with a mass ratio of 4:1;

[0057] (2) add the agate ball grinding medium of diameter 10mm in the ball mill reactor, adjust the rotating speed of ball mill to be 290rpm, add the ethylene glycol solution of 1mL / g and grind for 5 hours to obtain polymer material;

[0058] (3) Put the polymer material in a tube furnace and heat it to 750°C at a heating rate of 5°C / min under a nitrogen atmosphere; pyrolyze for 3 hours and cool to obtain graphitized carbon-loaded nano-zero-valent iron material .

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Abstract

The invention belongs to the field of preparation of nano-zero-valent iron-carbon materials, and in particular relates to a graphitized carbon-loaded nano-zero-valent iron material and its preparation method and application. The preparation method of the graphitized carbon-loaded nanometer zero-valent iron material comprises the following steps: (1) iron salt and 2-aminoterephthalic acid are placed in a ball mill reactor; (2) grinding media is added to the ball mill reactor , and grind to obtain the ball-milled material; (3) pyrolyzing and cooling the ball-milled material to obtain the graphitized carbon-supported nanometer zero-valent iron material. The prepared graphitized carbon-loaded nano-zero-valent iron material has higher and more durable catalytic degradation efficiency, and can better remove pollutants in environmental water samples, especially organic dye pollutants.

Description

technical field [0001] The invention belongs to the field of preparation of nanometer zero-valent iron-carbon materials, and in particular relates to a graphitized carbon-supported nanometer zero-valent iron material and its preparation method and application. Background technique [0002] Advanced Oxidation Processes (AOPs) is a method for treating toxic organic pollutants by generating hydroxyl radicals (OH·) with strong oxidizing properties. Among them, the Fenton method is an important part of the advanced oxidation technology. Compared with the traditional physical and biological treatment methods, the Fenton method using active free radicals as the oxidant has a fast reaction speed and high salinity, so it is widely used in sewage treatment. Iron exists widely in nature, and the use of iron-based materials in the removal of organic matter by the Fenton method has attracted extensive attention. Fenton's reagent consists of ferrous ions (Fe 2+ ) and hydrogen peroxide (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/72C02F101/30
CPCB01J27/24C02F1/725C02F2101/30C02F2101/308
Inventor 赵晓丽吕宏洲吴丰昌蔡亚岐
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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