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Magnetic iron-carbon composite material, preparation method and application thereof

A technology of carbon composite materials and magnetic iron, which is applied in the preparation of hydroxyl compounds, organic compounds, chemical instruments and methods, etc., can solve the problems of harsh preparation conditions, uneven particles, and inaccurate weight percentage of iron, etc. The effect of the degree of contact, the promotion of the reaction, and the advantage of energy saving

Inactive Publication Date: 2014-03-12
西安荣轩分析测试技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method has many shortcomings such as harsh preparation conditions, uneven particles, weak material magnetism, and highly toxic precursors. For example, the carbon-wrapped cobalt material mentioned in the literature (J. High temperature of 1700 °C, the weight percentage of iron in the obtained material is not exact, and the structural information is lacking

Method used

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  • Magnetic iron-carbon composite material, preparation method and application thereof
  • Magnetic iron-carbon composite material, preparation method and application thereof
  • Magnetic iron-carbon composite material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation of embodiment 1 iron MOF precursor MIL-53

[0032] Iron MOF materials (MOF, metal organic framework) are complexes of iron ions and organic compounds, including MIL-53, MIL-68, MIL-88, MIL-100, MIL-101, MOF-74, etc.

[0033] In the present embodiment, iron salt 2.7g FeCl 3 ·6H 2 O mixed with organic ligand 1.66g terephthalic acid, dissolved in 100ml N, N-dimethylformamide (DMF) solvent and stirred until clarified, put into a stainless steel reaction kettle lined with polytetrafluoroethylene, and 12 Hours from room temperature to 150 ° C, and then reacted at this temperature for 3 days, cooled and filtered to obtain a yellow solid. Such as figure 1 A thermogravimetric map of MIL-53 is shown, figure 1 It shows that the organic matter begins to decompose at 350°C, and the carbonization of the organic matter is complete at 700°C.

Embodiment 2

[0034] Example 2 Preparation of iron MOF precursor MIL-100

[0035] Mix 0.83g of iron powder, 2.06g of trimesic acid, 0.6ml of hydrofluoric acid (40%), and 1.14ml of nitric acid (65%) in 80ml of deionized water. In a stainless steel reaction kettle, it took 8 hours to rise from room temperature to 150° C., then reacted at this temperature for 4 days, cooled and filtered to obtain a solid.

Embodiment 3

[0036] Embodiment 3 Preparation of magnetic iron-carbon composite material

[0037] Take 1g of the iron MOF precursor obtained in Example 1 and put it into a quartz boat, use nitrogen as a protective gas in a tube furnace, program the temperature up to 450°C at 10°C per minute, keep it for 3 hours, start to cool down, and cool to room temperature Finally, take out the black magnetic iron-carbon composite material. The obtained material is tested by XRD analysis to have metal iron nanoparticles, and the average particle diameter is between 20-50nm. In the heating process, the preferred heating rate is 5°C-10°C, and ideal experimental results can be obtained.

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Abstract

A disclosed magnetic iron-carbon composite material comprises carbon-coated metallic iron nanoparticles and nanometeriron oxide particles, wherein the iron content is 45%-90% by weight and the specific surface area is 100-500 m<2> / g, and further the composite material comprises a compound composed of the carbon-coated metallic iron nanoparticles and the nanometeriron oxide particles. The invention also discloses a preparation method and application of the magnetic iron-carbon composite material. The magnetic iron-carbon composite material provided by the invention is relatively high in iron content, resistant to 400 DEG C high-temperature oxidation, excellent in magnetic property, easy for magnetic separation and guiding role and high in specific surface area; employed precursors are nontoxic and the preparation conditions are mild; and the material loaded with precious metals has extremely good activity on catalytic hydrogenation reactions, and the composite material is applicable to different catalytic reactions as an excellent catalyst carrier.

Description

technical field [0001] The invention relates to a carbon composite material preparation process, in particular to a magnetic iron-carbon composite material and a preparation method and application thereof. Background technique [0002] Today's society is facing an energy crisis and the test of sustainable development. Catalytic chemistry plays an extremely important role in economic development and energy production. The active centers of common catalysts are mainly noble metal nanoparticles or coordination compounds. During the catalytic reaction process, especially the liquid phase reaction, the active components are easy to lose, which not only causes environmental pollution, but also leads to high cost of the catalytic process. Therefore, the development of non-polluting, recyclable, and recyclable catalysts has important application value. [0003] Carbon materials are non-toxic, stable in chemical properties, easy to obtain raw materials, and can be widely used as cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/89B01J23/94C07C13/18C07C5/03C07C33/22C07C29/141
CPCY02P20/584
Inventor 关业军张大珉王一萌
Owner 西安荣轩分析测试技术服务有限公司
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