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Magnetic carbon nanotube composite material and preparation method and application thereof and method for removing pollutants in water

A technology of magnetic carbon nanotubes and composite materials, which is applied in the fields of alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., and can solve the problems of decreased adsorption performance, insufficient stability, and weak regeneration ability, etc.

Inactive Publication Date: 2016-10-19
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the disadvantages of the existing magnetic carbon nanotube composite material, such as significant decline in adsorption performance, weak regeneration ability, and insufficient stability under acidic conditions, to provide a magnetic carbon nanotube composite material and its preparation method and application, and to remove water Pollutant method, the magnetic carbon nanotube composite material combines excellent magnetic properties, adsorption properties and regeneration properties, and can exist stably in acidic media, applicable to a wide pH range

Method used

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  • Magnetic carbon nanotube composite material and preparation method and application thereof and method for removing pollutants in water
  • Magnetic carbon nanotube composite material and preparation method and application thereof and method for removing pollutants in water
  • Magnetic carbon nanotube composite material and preparation method and application thereof and method for removing pollutants in water

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Embodiment 1

[0063] (1) Put 0.2g of aminated carbon nanotubes (TNMC2, >95wt%, Chengdu Organic Chemical Company, Chinese Academy of Sciences) into 50mL ultrapure water for ultrasonic dispersion, the ultrasonic power is 100W, and the ultrasonic time is 4s / time×40times , to obtain a carbon nanotube dispersion. Weigh cobalt nitrate Co(NO 3 ) 2 ·6H 2 O0.226g and iron nitrate Fe (NO 3 ) 3 9H 2 O 0.527g was placed in 20mL of ultrapure water and dissolved to obtain a solution containing cobalt ions and iron ions. Then, the carbon nanotube dispersion was mixed with a solution containing cobalt ions and iron ions under ultrasonic conditions. The ultrasonic conditions included: ultrasonic power 100W, ultrasonic time 4s / time×40 times.

[0064] (2) Under the ultrasonic conditions that the ultrasonic power is 100W and the ultrasonic time is 4s / time×40 times, adjust the pH of the mixture obtained in step (1) to a pH value of 12 with 2mol / L NaOH solution, and then use 200r / min Stir vigorously at th...

Embodiment 2

[0084] (1) Put 0.15g carboxylated carbon nanotubes (TNMN2, >95wt%, Chengdu Organic Chemical Company, Chinese Academy of Sciences) into 50mL ultrapure water for ultrasonic dispersion, the ultrasonic power is 50W, and the ultrasonic time is 2s / time×60 times to obtain a carbon nanotube dispersion. Weigh cobalt chloride CoCl 2 ·6H 2 O0.136g and ferric chloride FeCl 3 ·6H 2 O 0.296g was placed in 20mL of ultrapure water and dissolved to obtain a solution containing cobalt ions and iron ions. Then, the carbon nanotube dispersion was mixed with a solution containing cobalt ions and iron ions under ultrasonic conditions. The ultrasonic conditions included: ultrasonic power 50W, ultrasonic time 2 s / time×60 times.

[0085] (2) Under the ultrasonic conditions that the ultrasonic power is 50W and the ultrasonic time is 2s / time × 60 times, the mixture obtained in step (1) is adjusted to a pH value of 13 with 3mol / L NaOH solution, and then 250r / min Vigorously stir at the stirring speed...

Embodiment 3

[0090] (1) Put 0.25g hydroxylated carbon nanotubes (TNMH2, >95wt%, Chengdu Organic Chemical Company, Chinese Academy of Sciences) into 50mL ultrapure water for ultrasonic dispersion, the ultrasonic power is 150W, and the ultrasonic time is 3s / time×60 times to obtain a carbon nanotube dispersion. Weigh cobalt nitrate Co(NO 3 ) 2 ·6H 2 O0.274g and iron nitrate Fe (NO 3 ) 3 9H 2 0.630g was placed in 20mL of ultrapure water and dissolved to obtain a solution containing cobalt ions and iron ions. Then, the carbon nanotube dispersion was mixed with a solution containing cobalt ions and iron ions under ultrasonic conditions. The ultrasonic conditions included: ultrasonic power of 150 W, ultrasonic time of 3 s / time×60 times.

[0091] (2) Under the ultrasonic power of 150W and the ultrasonic time of 3s / time × 60 times, the mixture obtained in step (1) is adjusted to a pH value of 12.5 with a 1mol / L NaOH solution, and then 150r / L The stirring speed of min was vigorously stirred f...

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Abstract

The invention relates to the field of materials, and discloses a magnetic carbon nanotube composite material and a preparation method and application thereof and a method for removing pollutants in water. The magnetic carbon nanotube composite material comprises a carbon nano tube and cobalt ferrite loaded on the carbon nano tube, and with the total weight of the magnetic carbon nanotube composite material as the standard, the content of the cobalt ferrite accounts for 40-50 wt%, and the content of the carbon nano tube accounts for 50-60 wt%. The magnetic carbon nanotube composite material has excellent magnetism, adsorption performance and regeneration performance, can stably exist in an acid medium and is suitable for a wide pH range.

Description

technical field [0001] The invention relates to a magnetic carbon nanotube composite material, its preparation method and application, and a method for removing pollutants in water by using the magnetic carbon nanotube composite material. Background technique [0002] Since carbon nanotubes (Carbon Nanotubes, CNTs) have been applied to the environmental field, due to their unique surface structure, large specific surface area, good stability, and rich surface functional groups, they have caused a variety of pollution in water bodies. Due to their excellent adsorption properties, they have attracted extensive attention from researchers. However, its small size makes it difficult to separate carbon nanotubes from the solution, which has become a bottleneck problem for the practical application of carbon nanotubes in pollution control. At present, some methods, such as ultracentrifugal separation and membrane filtration, have been used to solve the separation problem of carbon...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28
Inventor 孙卫玲汪菲潘伟一
Owner PEKING UNIV