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Method for preparing carbon nanotube (CNT)/layered double-metal hydroxide (LDH) compound

A layered bimetallic and carbon nanotube technology, which is applied in the preparation of microspheres and microcapsule preparations, can solve the problems of low uniformity of carbon nanotube dispersion and cumbersome steps, and achieve good ion exchange and stripping performance, phase Capacitance is improved and the preparation steps are simple and easy

Inactive Publication Date: 2012-02-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combination of LDH and carbon nanotubes usually adopts a two-step method, that is, first synthesize LDH, and then mix it with the aqueous dispersion of carbon nanotubes. The steps are relatively cumbersome, and more importantly, the dispersion of carbon nanotubes is not uniform.

Method used

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  • Method for preparing carbon nanotube (CNT)/layered double-metal hydroxide (LDH) compound
  • Method for preparing carbon nanotube (CNT)/layered double-metal hydroxide (LDH) compound
  • Method for preparing carbon nanotube (CNT)/layered double-metal hydroxide (LDH) compound

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Put the carbon nanotubes into a muffle furnace, calcinate at 450°C for 30 minutes, add deionized water after cooling, ultrasonicate for 30 minutes, then treat with 9mol / L concentrated nitric acid at 80°C for 5 hours, filter with suction, and use excess Rinse with deionized water several times until the filtrate is neutral, and then dry to obtain acidified carbon nanotubes.

[0031] Add 0.05 g of the above-mentioned acidified carbon nanotubes into 200 ml of deionized water and sonicate for 15 minutes, and let stand to obtain a dispersion of acidified carbon nanotubes.

[0032]0.87g cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O), 0.56g aluminum nitrate (Al(NO 3 ) 3 9H 2 O) and 0.63g urea (CH 4 N 2 O) be dissolved in 100ml deionized water, after stirring evenly, then mix with the dispersion liquid of above-mentioned acidified carbon nanotubes in a flask to obtain a reaction solution, wherein the concentration of acidified carbon nanotubes is 0.17mg / ml, cobalt nitrate, aluminu...

Embodiment 2

[0036] Put carbon nanotubes in a muffle furnace, calcinate at 400°C for 40min, add deionized water after cooling, ultrasonicate for 30min, then treat with 9mol / L concentrated nitric acid at 90°C for 5h, filter with suction, and use excess deionized water Rinse several times until the filtrate is neutral, and dry to obtain acidified carbon nanotubes.

[0037] Add 0.1 g of the above-mentioned acidified carbon nanotubes into 200 ml of deionized water and sonicate for 15 minutes, and let stand to obtain a dispersion of acidified carbon nanotubes.

[0038] 0.87g cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O), 0.56g aluminum nitrate (Al(NO 3 ) 3 9H 2 O) and 0.63g urea (CH 4 N 2 O) be dissolved in 100ml deionized water, after stirring uniformly, then mix with the dispersion liquid of above-mentioned acidified carbon nanotubes in a flask to obtain a reaction solution, wherein, the concentration of acidified carbon nanotubes is 0.34mg / ml, cobalt nitrate, aluminum nitrate and urea concent...

Embodiment 3

[0042] Put the carbon nanotubes in a muffle furnace, calcinate at 500°C for 20min, add deionized water after cooling, ultrasonicate for 30min, then treat with 9mol / L concentrated nitric acid at 100°C for 5h, suction filter, and use excess deionized water Rinse several times until the filtrate is neutral, and dry to obtain acidified carbon nanotubes.

[0043] Add 0.2 g of the above-mentioned acidified carbon nanotubes into 200 ml of deionized water and sonicate for 15 minutes, and let stand to obtain a dispersion of acidified carbon nanotubes.

[0044] 0.87g cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O), 0.56g aluminum nitrate (Al(NO 3 ) 3 9H 2 O) and 0.63g urea (CH 4 N 2 O) be dissolved in 100ml deionized water, after stirring uniformly, then mix with the dispersion liquid of above-mentioned acidified carbon nanotubes in a flask to obtain a reaction solution, wherein the concentration of acidified carbon nanotubes is 0.68mg / ml, cobalt nitrate, aluminum nitrate and urea concentr...

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Abstract

The invention discloses a method for preparing a CNT / LDH compound. The CNT / LDH compound is obtained through connecting hydroxy groups and carboxylic groups to the surface of CNTs through acidifying, adding metal salts and an alkaline substance to an aqueous dispersion of the CNTs, and forming an LDH in an in situ mode. The method of the invention has the advantages of simplicity, no need of a high temperature and low cost; and in the prepared CNT / LDH compound, the CNTs are uniformly dispersed in the LDH, and the composition and the structure are controllable. The prepared CNT / LDH compound which well preserves the layered structure of the LDH and effectively improves the dispersibility of the CNTs allows the sheet peeling of the LDH and the uniform dispersion of the CNTs to be easily realized when the CNT / LDH compound is applied to a polymer matrix.

Description

technical field [0001] The invention belongs to the field of inorganic material synthesis, and in particular relates to a method for preparing a carbon nanotube / layered double metal hydroxide compound. Background technique [0002] As we all know, since the advent of carbon nanotubes (CNTs) in 1991, it has become one of the research hotspots worldwide due to its unique structure and various excellent properties including mechanics, electricity, magnetism, electrochemical and adsorption properties. First, it is widely used in nano-devices, polymer composite materials, catalyst supports, etc. Especially when carbon nanotubes are used as fillers, adding a very small amount can greatly improve the mechanical, conductive and electromagnetic shielding properties of the polymer matrix. However, carbon nanotubes are almost insoluble in any solvent, and because of their small size and large surface energy, they are prone to agglomeration and difficult to uniformly disperse in the po...

Claims

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Application Information

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IPC IPC(8): B01J13/02
Inventor 郑强傅华康杜淼
Owner ZHEJIANG UNIV
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