Iron-carbon composite material as well as preparation method and application thereof

A composite material, iron-carbon technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problem of weak binding force between iron nanoparticles and carbon particles, long preparation process time, and loading capacity Low-level problems, to achieve strong redox activity, increase effective utilization, and increase the effect of loading capacity

Pending Publication Date: 2021-06-15
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of low loading capacity, weak binding force between iron nanoparticles and carbon particles, and long preparation time when iron nanoparticles are loaded on the surface of carbon particles by iron salt solution impregnation method to prepare iron-carbon composite materials. , low efficiency, providing an iron-carbon composite material and its preparation method and application

Method used

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  • Iron-carbon composite material as well as preparation method and application thereof
  • Iron-carbon composite material as well as preparation method and application thereof
  • Iron-carbon composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A kind of iron-carbon composite material of the present embodiment, its preparation method is as follows:

[0050] (1) Coal powder and ferrous sulfate are used as reaction raw materials, and methyl cellulose is used as a binder. According to the iron-carbon molar ratio of 1:1.2, the amount of binder is 1%, the ingredients are mixed uniformly, the particle size of the powder is controlled by granulation to be about 1 μm, and then put into the blast drying oven for 4 hours at 60°C, ground and sieved After separation, the precursor for preparing iron-carbon composite materials was obtained.

[0051] (2) Take 5g of the precursor obtained in step 1 and put it into the heating furnace, control the nitrogen flow rate to 100ml / min, the thickness of the precursor powder to be 1mm, and the partial pressure of the inert gas in the entire reaction system to be 90-95%, and heat it at 600°C Keep warm for 240min, then cool down to room temperature. Specifically, when the temperature...

Embodiment 2

[0056] A kind of iron-carbon composite material of the present embodiment, its preparation method is as follows:

[0057] (1) Taking graphite powder and ferric nitrate as reaction raw materials, taking stearic acid as binding agent. According to the iron-carbon molar ratio of 1:11, the amount of binder is 10%, the ingredients are mixed evenly, the particle size of the powder is controlled by granulation to be about 30 μm, and then put into a blast drying oven for 2 hours at 80°C, ground and sieved After separation, the precursor for preparing iron-carbon composite materials was obtained.

[0058] (2) Take 100g of the precursor obtained in step 1 and put it into the heating furnace, control the nitrogen flow rate to 5000ml / min, the powder thickness of the precursor is 30mm, and the partial pressure of the inert gas in the whole reaction system is 91-96%, and heat it at 1000°C Keep warm for 120min, then cool down to room temperature. Specifically, when the temperature is raise...

Embodiment 3

[0063] A kind of iron-carbon composite material of the present embodiment, its preparation method is as follows:

[0064] (1) With active carbon and ferrous carbonate as reaction raw materials, with polyvinyl alcohol as binding agent. According to the iron-carbon molar ratio of 1:5, the amount of binder is 5%, the ingredients are mixed uniformly, the particle size of the powder is controlled by granulation to be about 10 μm, and then put into a blast drying oven for 3 hours at 70°C, ground and sieved After separation, the precursor for preparing iron-carbon composite materials was obtained.

[0065] (2) Take 30g of the precursor obtained in step 1 and put it into the heating furnace, control the nitrogen flow rate to 1000ml / min, the powder thickness of the precursor is 10mm, and the partial pressure of the inert gas in the whole reaction system is 90-96%. Keep warm for 180min, then cool down to room temperature. Specifically, when the temperature is raised, when the temperat...

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Abstract

The invention discloses an iron-carbon composite material as well as a preparation method and application thereof, and belongs to the technical field of environment-friendly materials. According to the invention, carbon particles and iron salt are used as raw materials, a technical method of bonding granulation-carbon thermal reduction-surface coating is adopted for preparation, and the prepared material takes the carbon particles as a carrier, and iron particle clusters as a load. The molar ratio of the iron particles to the carbon particles is 1:0.2 to 1:10. The iron particles are of a core-shell structure, the core is elemental iron with the particle size of 50-200 nm, and the shell is ferroferric oxide with the thickness of 1-10 nm. The carbon particles are similar to spheres, and the particle size is 0.3-20 microns. The composite material is coated with a layer of water-soluble film for isolating air, and the mass of the film accounts for 0.05-0.5% of the total mass of the material. The material provided by the invention can efficiently remove heavy metal pollutants in water, improves the treatment rate, reduces the treatment cost, shortens the treatment flow, and is a novel water treatment material which has a wide application prospect and is easy to realize industrial production and application.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, and more specifically relates to an iron-carbon composite material and its preparation method and application. Background technique [0002] In the field of environmental protection, heavy metals mainly refer to heavy elements with significant biological toxicity such as mercury, cadmium, lead, chromium, and metalloid arsenic. With the increasing activities of mining, smelting and processing of heavy metals in human society, a large amount of heavy metals have been discharged into water bodies, causing increasingly severe water pollution and drinking water safety problems. In recent years, domestic and foreign scholars have developed a variety of new water treatment materials based on the concept of stabilization and harmlessness of heavy metal pollutants. [0003] Nanoscale iron particles have the advantages of excellent water treatment performance, environmental frie...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/461C02F1/70B01J20/20B01J20/30C02F101/20C02F101/22C02F101/10
CPCC02F1/288C02F1/46176C02F1/46114C02F1/705B01J20/06B01J20/20B01J20/02C02F2001/46133C02F2101/20C02F2101/22C02F2101/103
Inventor 李梦醒周杨杨张晓峰吴泽韩召
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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