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Process for preparing nano metal particles/carbon composite material

A technology of nano-metal particles and carbon composite materials, which is applied in the field of preparation of nano-metal particles/carbon composite materials, which can solve the problems of difficult control of metal content, complicated process, and high carbonization pressure

Inactive Publication Date: 2002-12-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Apparently, this method has complicated process (need to synthesize metal copolymer, and process such as dissolution, evaporation, slow carbonization), low carbonization yield (in addition to carbon, hydrogen and metal elements, the polymer also contains a certain amount of O , N, S and other heteroatoms), high carbonization pressure (up to 100MPa), difficulty in controlling the metal content in the material, high material cost, and difficulty in large-scale preparation, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Refined petroleum residue by catalytic cracking (wt% element content: C 88.86, H 9.42, C / H 0.97, N≤0.3, O 0.42, S 0.82) and analytically pure ferrocene in a weight ratio of 1:0.2 evenly Mix and place in an autoclave. The reaction was heated under continuous mechanical stirring and nitrogen protection. The heating rate was maintained at 3°C / min, and the pyrolysis product was obtained at 420°C for 6 hours. The reaction product was subjected to repeated thermal extraction (temperature 80° C.) with pyridine as a solvent until the filtrate became colorless and clear. The filter residue after drying is the powdered metal / carbon material, and the elemental analysis results show that the weight percentage of metallic iron is about 9.3%, and the content of carbon element is 90.0%. The product was analyzed by X-ray diffraction (XRD) and transmission electron microscope (TEM), and the results showed that the obtained metal particles were mainly iron (α-Fe), with a particle size b...

Embodiment 2

[0021] The operation method is the same as in Example 1, the weight ratio of petroleum residue to ferrocene is 1: 0.01, and the other conditions are unchanged. After carbonization and solvent extraction, nano-particles mainly composed of α-Fe and with a particle size distribution of 10-50nm are obtained. Iron particles / carbon composites.

Embodiment 3

[0023] The operation method is the same as in Example 1, the weight ratio of petroleum residue to ferrocene is 1:1, and the other conditions are unchanged. After carbonization and solvent extraction, nano Iron particles / carbon composites. Example 4

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Abstract

A metal nano particle / carbon composite material is prepared from hydrocarbon compound and transition metal compound in a weight ratio of 1:(0.01-1) through proportional mixing, charring reaction at 400-550 deg.C in inert gas for 6 hr, and extracting by hot fusion. Said hydrocarbon compound may be paraffine, olefin, etc. Said transition metal compound may be cyclopentadienyl transition metal compound, carbonyl transition metal compound, etc. Its advantages are simple preparing process and high purity.

Description

technical field [0001] The invention relates to a new method for preparing nano metal particle / carbon composite material, which is prepared by carbonization reaction of hydrocarbon compound and transition metal compound. technical background [0002] Nano-metal particle / carbon material is a new type of nano-scale functional composite material, in which the metal particle size is less than 100nm and the particle size is neatly and uniformly dispersed in the carbon matrix. It can be stable in the air for a long time and has good heat resistance. Nano metal particles cannot exist stably in the air. Once this new type of material appeared, it aroused great interest in the chemical, material science and business circles, and was considered to be a new type of special material with broad application prospects. Depending on the type of metal particles and the carbon matrix, the material is expected to be used as electrical and electronic materials (sensors, conductive adhesives, e...

Claims

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Application Information

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IPC IPC(8): C04B35/52C04B35/56
Inventor 宋怀河陈晓红
Owner BEIJING UNIV OF CHEM TECH
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