Surface modification method of carbon nanotube, carbon nanotube and application thereof

A technology of carbon nanotubes and modification methods, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve problems such as weak interaction, poor adsorption effect, and lack of functional groups , to achieve the effect of high reuse rate, easy separation and enhanced adsorption performance

Inactive Publication Date: 2012-06-20
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of functional groups on its surface, the interaction with metal ions is weak, so the adsorption

Method used

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  • Surface modification method of carbon nanotube, carbon nanotube and application thereof
  • Surface modification method of carbon nanotube, carbon nanotube and application thereof
  • Surface modification method of carbon nanotube, carbon nanotube and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 1.0 g of multi-walled carbon nanotubes into 100 g of concentrated nitric acid, and heat to reflux for 24 hours at 100° C. with stirring. After cooling to room temperature, high-speed centrifugal separation, the solid was washed with deionized water to a pH value of 7, and vacuum-dried at 50° C. for 12 hours to obtain acidified multi-walled carbon nanotubes.

[0022] Mix 200 mg of acidified carbon nanotubes, 40 g of dimethylformamide and 100 g of thionyl chloride, and ultrasonically disperse for 10 minutes. The reaction was then stirred at a temperature of 70°C for 20 hours. Excess thionyl chloride was removed by distillation under reduced pressure. The solid product was filtered with a nylon membrane, washed with tetrahydrofuran, and vacuum-dried at 50° C. for 24 hours to obtain acyl chloride carbon nanotubes.

[0023] Add 100 mg of carbonyl chloride carbon nanotubes and 100 mg of sodium p-aminobenzenesulfonate to 5 g of dimethylformamide, and ultrasonically dispe...

Embodiment 2

[0026] Add 1.0 g of single-walled carbon nanotubes into 200 g of concentrated nitric acid, and heat to reflux for 12 hours at 80° C. with stirring. After cooling to room temperature, high-speed centrifugation, the solid was washed with deionized water to a pH value of 7, and vacuum-dried at 70° C. for 10 hours to obtain acidified multi-walled carbon nanotubes.

[0027] Mix 200 mg of acidified carbon nanotubes, 10 g of dimethylformamide and 40 g of thionyl chloride, and ultrasonically disperse for 30 minutes. The reaction was then stirred at a temperature of 100° C. for 30 hours. Excess thionyl chloride was removed by distillation under reduced pressure. The solid product was filtered with a nylon filter membrane, washed with tetrahydrofuran, and dried under vacuum at 60°C for 18 hours to obtain acyl chloride carbon nanotubes.

[0028]Add 100 mg of acyl chloride carbon nanotubes and 200 mg of sodium p-aminobenzenesulfonate into 10 g of dimethylformamide, and disperse ultrason...

Embodiment 3

[0031] Add 1.0 g of single-walled carbon nanotubes into 150 g of concentrated nitric acid, and heat to reflux for 18 hours at 90° C. with stirring. After cooling to room temperature, high-speed centrifugation, the solid was washed with deionized water to a pH value of 7, and vacuum-dried at 70° C. for 6 hours to obtain acidified multi-walled carbon nanotubes.

[0032] Mix 200 mg of acidified carbon nanotubes, 30 g of dimethylformamide and 60 g of thionyl chloride, and ultrasonically disperse for 30 minutes. The reaction was then stirred at a temperature of 90°C for 25 hours. Excess thionyl chloride was removed by distillation under reduced pressure. The solid product was filtered with a nylon filter membrane, washed with tetrahydrofuran, and dried under vacuum at 70°C for 12 hours to obtain acyl chloride carbon nanotubes.

[0033] Add 100 mg of acyl chloride carbon nanotubes and 150 mg of sodium p-aminobenzenesulfonate into 15 g of dimethylformamide, and disperse ultrasonica...

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Abstract

The invention relates to a surface modification method of carbon nanotube and application of the surface modified carbon nanotube. The surface modification method comprises the following steps: (1) adding carbon nanotubes into concentrated nitric acid, heating and refluxing under stirring, cooling, centrifuging to obtain a solid matter, washing the solid matter with deionized water to pH 7, vacuum drying to obtain acidified carbon nanotubes, adding the acidified carbon nanotubes and thionyl chloride into an organic solvent, ultrasonic dispersing, stirring for reaction, distilling under reduced pressure to obtain a solid product, filtering the solid product with a nylon filter membrane, cleaning, vacuum drying to obtain carbon nanotube acyl chloride, adding carbon nanotube acyl chloride and sodium p-aminobenzenesulfonate into an organic solvent, ultrasonic dispersing, stirring for reaction, cooling the reaction solution to room temperature, suction-filtering with a nylon membrane, washing, and vacuum drying to obtain multi-wall carbon nanotubes modified by sodium p-aminobenzenesulfonate. The surface modified carbon nanotube prepared by the invention has significantly enhanced metal ion adsorption property and high recycle rate, and is easy to be separated.

Description

technical field [0001] The invention relates to a functionalized carbon nanotube and its application, in particular to modifying the carbon nanotube with sodium p-aminobenzenesulfonate and its use for absorbing heavy metal ions in water. Background technique [0002] Adsorption is an important water treatment method. Its principle is to use the surface effect of the adsorbent to remove pollutants in water and achieve the purpose of purification. Adsorbents commonly used in water treatment include activated carbon, metal oxides, natural minerals, etc. Among them, activated carbon has a good adsorption effect on organic pollutants, but has a poor effect on the removal of heavy metals. However, metal oxides and natural minerals are not effective in removing low-concentration pollutants. Due to its huge surface effect and good chemical stability, carbon nanotubes have potential application value as a new type of adsorption material (Li Y H, Wang S G, Zhang X F, et a1. Adsorpti...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F1/62
Inventor 郑净植杜飞鹏胡建
Owner WUHAN INSTITUTE OF TECHNOLOGY
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