Carbon-based/metal composite material and preparation method thereof

A metal composite material and composite material technology are applied in the field of carbon-based/metal composite materials and their preparation, which can solve the problems of difficulty in obtaining single-atom or atomic cluster structures, aggregation and growth, etc., and achieve the effect of overcoming structural collapse and being easy to achieve.

Active Publication Date: 2022-07-01
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the high-temperature carbonization process, metal atoms will aggregate and grow under the drive of high temperature, making it difficult to obtain the structure of single atoms or atomic clusters

Method used

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  • Carbon-based/metal composite material and preparation method thereof
  • Carbon-based/metal composite material and preparation method thereof
  • Carbon-based/metal composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of a carbon-based / metal composite material, comprising: preparing potassium as an alkali metal, using ZIF-67 (Chemical Engineering Journal 289(2016) 59-64.) as a metal framework material, and combining the alkali metal and the metal framework The materials are mixed in a quartz tube, vacuumed, and the quartz tube is sealed. The quartz tube is placed in a muffle furnace to heat up to 300 °C, the heating rate is 5 °C / min, and the temperature is kept for 24 hours. Cool down to room temperature of 20-25 °C with the furnace, and take it out. , broken the quartz tube, quenched with methanol, and suction filtered to obtain a carbon-based / metal composite material, wherein, in parts by mass, the ratio of alkali metal to metal framework material is 4:1.

[0025] Therein, the temperature is raised to 300°C so that the alkali metal forms potassium vapor and acts as a reducing agent.

[0026] In the above-mentioned technical scheme, quenching with methanol is du...

Embodiment 2

[0032] A preparation method of a carbon-based / metal composite material, comprising: preparing potassium as an alkali metal, using ZIF-8 (Chemical Communications 47(7)(2011) 2071-2073.) as a metal framework material, using alkali metal and metal The framework material is mixed in a quartz tube, evacuated, and the quartz tube is sealed. The quartz tube is placed in a muffle furnace to heat up to 360 °C, the heating rate is 5 °C / min, the temperature is kept for 24 hours, and the furnace is cooled to room temperature 20-25 °C , take out, break the quartz tube, quench with methanol, and filter with suction to obtain a carbon-based / metal composite material, wherein, in parts by mass, the ratio of alkali metal to metal framework material is 4:1.

[0033] Therein, the temperature is raised to 360° C. so that the alkali metal forms potassium vapor and acts as a reducing agent.

[0034] Compared with ZIF-8, the structure of carbon-based / metal composites observed by transmission electron...

Embodiment 3

[0036] A method for preparing a carbon-based / metal composite material, comprising: preparing potassium as an alkali metal, using a ferric chloride-covalent framework material composite material as a metal framework material, and mixing the alkali metal and the metal framework material in a quartz tube, Vacuum, seal the quartz tube, place the quartz tube in a muffle furnace and heat up to 360 ° C, the heating rate is 5 ° C / min, keep the temperature for 24 hours, cool down to room temperature 20-25 ° C with the furnace, take out, break the quartz tube, Quenching with methanol and suction filtration to obtain a carbon-based / metal composite material, wherein, in parts by mass, the ratio of alkali metal to metal framework material is 4:1.

[0037] Therein, the temperature is raised to 360° C. so that the alkali metal forms potassium vapor and acts as a reducing agent.

[0038] The preparation method of the ferric chloride-covalent framework material composite material is as follows...

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Abstract

The invention discloses a carbon-based / metal composite material and a preparation method thereof. The method includes: under vacuum conditions, mixing alkali metal and metal framework material, heating the temperature to 200-600° C., keeping the temperature for 24-168 hours, and adding methanol Quenching and suction filtration to obtain the carbon-based / metal composite material, the present invention adopts alkali metal as a reducing agent, and under low temperature conditions, realizes the carbonization of the metal framework material, and overcomes the metal framework material caused by traditional carbonization. Structural collapse, metal element nucleation, growth or volatilization is limited, and atomically dispersed carbon / metal composites are obtained.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a carbon-based / metal composite material and a preparation method thereof. Background technique [0002] Metal framework compounds are metal-organic composites with large specific surface, abundant pores and great application potential. One of the important aspects is the high temperature carbonization of metal framework compounds to obtain metal / carbon composites. In the carbonization process, it is generally desirable to maintain the skeleton structure of carbon, that is, to maintain a large specific surface area and pores. However, generally in the carbonization process, it is easy to cause the structure to collapse due to the need to release the small molecules linked to the framework structure. [0003] In addition, the carbonization process also wants to maintain the independence of the metal atoms of the framework compound, preferably in the f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C01B32/05
CPCC22C1/08C01B32/05
Inventor 冯建民梁骥李德军董雷龙从来
Owner TIANJIN NORMAL UNIVERSITY
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