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Preparation method of catalyst capable of controlling growth of carbon nano pipe and carbon fibre

A carbon nanotube and catalyst technology, applied in the field of catalyst preparation that can control the growth of carbon nanotubes and carbon fibers, can solve the problems of difficult control of metal particle size and high preparation cost, and achieve the difficulty of particle size control, convenient operation and easy separation Effect

Inactive Publication Date: 2012-05-09
BEIJING UNIV OF CHEM TECH
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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 provide a catalyst preparation method that can control the growth of carbon nanotubes and carbon fibers, which overcomes the disadvantages of high preparation cost and difficult control of metal particle size in traditional catalysts

Method used

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  • Preparation method of catalyst capable of controlling growth of carbon nano pipe and carbon fibre
  • Preparation method of catalyst capable of controlling growth of carbon nano pipe and carbon fibre
  • Preparation method of catalyst capable of controlling growth of carbon nano pipe and carbon fibre

Examples

Experimental program
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Effect test

Embodiment 1

[0024] 0.8421g urea and 1.2266g NiSO 4 ·6H 2 O mixed with 5mL deionized water to prepare a salt mixture solution, impregnated with 2.0041g of γ-Al 2 o 3 Carrier, and then put the impregnated carrier into a hydrothermal kettle, hydrothermally react at 120°C for 12h in a static state, take out the product and wash until the washing water is neutral, and dry at 70°C for 12h to obtain a supported hydrotalcite. Put 100mg of this hydrotalcite into a porcelain boat, then put it in the heating position of the horizontal quartz tube in the tubular heating furnace, feed in nitrogen gas with a flow rate of 60mL / min, raise the temperature to 700°C at a rate of 5°C / min, and then At this temperature, acetylene gas was introduced at a flow rate of 6 mL / min, and the introduction of acetylene was stopped after 4 hours of heat preservation. Finally, carbon nanotubes with uniform sizes were obtained after cooling to room temperature with the furnace. The generated carbon nanotubes have unifor...

Embodiment 2

[0026] 1.1212g urea and 1.0166g Ni(NO 3 ) 2 ·6H 2 O and 0.2370 gMgCl 2 ·6H 2 O was mixed with 3mL deionized water to prepare a mixed salt solution, and 2.0075g of γ-Al was impregnated with this solution 2 o 3 Carrier, and then put the impregnated carrier into a hydrothermal kettle, hydrothermally react at 100°C for 12h in a static state, take out the product and wash until the washing water is neutral, and dry at 70°C for 12h to obtain a supported hydrotalcite. Put 100mg of this product into a porcelain boat, then put it on the heating position of the horizontal quartz tube in the tubular heating furnace, feed nitrogen gas with a flow rate of 60mL / min, raise the temperature to 700°C at a rate of 5°C / min, and then At this temperature, the flow rate of acetylene gas was 6mL / min, and the acetylene gas was stopped after 1 hour of heat preservation. Finally, carbon nanotubes with uniform size were obtained after cooling to room temperature with the furnace, with an average dia...

Embodiment 3

[0028] 0.5620g urea and 1.0205g Ni(NO 3 ) 2 ·6H 2 O and 0.2819gCu(NO 3 ) 2 ·3H 2 O mixed with 2mL of deionized water to prepare an aqueous solution, and impregnated 1.0255g of γ-Al with this solution 2 o 3 Carrier, and then put the impregnated carrier into a hydrothermal kettle, hydrothermally react at 130°C for 6 hours in a static state, take out the product and wash until the washing water is neutral, and dry at 70°C for 12 hours to obtain a supported hydrotalcite. Put 100mg of this hydrotalcite into a porcelain boat, then put it in the heating position of the horizontal quartz tube in the tubular heating furnace, feed in nitrogen gas with a flow rate of 60mL / min, raise the temperature to 700°C at a rate of 5°C / min, and then At this temperature, acetylene gas with a flow rate of 6mL / min was introduced, and the introduction of acetylene was stopped after 2 hours of heat preservation. Finally, helical carbon fibers with uniform size were obtained after cooling to room te...

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Abstract

The invention relates to a preparation method of a catalyst capable of controlling the growth of a carbon nano pipe and carbon fibre, which belongs to the technical field of catalysts. In the invention, the characteristic of the pore structure of a carrier of gamma-Al2O3 is combined according to the characteristics of designability of the structure of lamellar bimetallic hydroxide (LDHs) and adjustable degeneration of the formation of a laminate, urea is used as a precipitator, the surface of the inner pore of the carrier is utilized to provide an aluminum source, LDHs containing the active components of Ni and Cu is synthesized in situ at the surface of the aluminum source, and nano metal particles generated by the LDHs used as a catalyst precursor in the chemical vapor deposition process can catalyze and decompose acetylene gas to respectively obtain a carbon nano pipe or helical carbon fibre with uniform size. The invention overcomes the defects of high preparation cost and uncontrollable metal grain diameter existing in a traditional catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular provides a catalyst preparation method capable of controlling the growth of carbon nanotubes and carbon fibers. technical background [0002] Carbon nanotubes and carbon fibers have been attracting the attention of researchers at home and abroad with their unique structures and excellent properties since they came out. Carbon nanotubes and carbon fibers have good mechanical properties, thermal stability, special electrical properties, thermal conductivity, hydrogen storage, adsorption and catalytic properties, etc., but they have great differences in synthesis methods, morphology, and structure. At present, the most common preparation method is the catalytic chemical vapor deposition method, in which the active components of the catalyst used are mainly transition metals Fe, Co, Ni or their alloys. In recent years, Cu, Mo, Sn, etc. have also been introduced into the catalyst c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755D01F9/127B01J35/10C01B31/02B82B3/00
Inventor 李峰秦华项顼
Owner BEIJING UNIV OF CHEM TECH