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Glutamic acid modified carbon nanotube composite as well as preparation method and application thereof

A carbon nanotube and composite material technology, which is applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc. problem, to achieve the effect of high practical application value, good water solubility and good biocompatibility

Active Publication Date: 2018-10-12
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the adsorption capacity of carbon nanotubes for heavy metals is not strong, which also limits the widespread use of carbon nanotubes in environmental pollution control.

Method used

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  • Glutamic acid modified carbon nanotube composite as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]A glutamic acid-modified carbon nanotube composite material includes carbon nanotubes, and the surface of the carbon nanotubes is modified with glutamic acid, wherein the glutamic acid is modified on the surface of the carbon nanotubes through covalent grafting. The mass content of carboxyl groups in the glutamic acid-modified carbon nanotube composite material is 2.26% (w / w).

[0030] A preparation method of the glutamic acid-modified carbon nanotube composite material in the above-mentioned embodiment, comprises the following steps:

[0031] (1) Oxidation treatment of carbon nanotubes: 1g of multi-walled carbon nanotubes (commercially available, the outer diameter of the multi-walled carbon nanotubes is 10-20nm, and the length is 5-20 μm) is placed in a mixture of concentrated sulfuric acid and concentrated nitric acid In the mixed acid solution (the mixed solution is composed of 150mL concentrated sulfuric acid and 50mL concentrated nitric acid), ultrasonically treat ...

Embodiment 2

[0036] An application of a glutamic acid-modified carbon nanotube composite material in the adsorption of dyes in water bodies, specifically the application in the adsorption of methylene blue in water bodies, comprising the following steps:

[0037] According to the mass volume ratio of the glutamic acid-modified carbon nanotube composite material to the water body (methylene blue aqueous solution) is 0.05g: 1L, two parts of the glutamic acid-modified carbon nanotube composite material prepared in Example 1 were weighed, and the concentration In the methylene blue aqueous solution of 3mg / L and 5mg / L (the volume of the solution is 100mL), mix evenly, and carry out constant temperature oscillation treatment at 180rpm and 25°C for 24h under dark conditions to complete the treatment of the methylene blue aqueous solution. After the shaking treatment, let it stand for precipitation, take the supernatant and measure the concentration of methylene blue with a UV-visible spectrophotom...

Embodiment 3

[0043] An application of a glutamic acid-modified carbon nanotube composite material in the adsorption of heavy metals in water, specifically the application of lead in the adsorption of water, comprising the following steps:

[0044] According to the mass volume ratio of the carbon nanotube composite material modified by glutamic acid to the water body (lead ion aqueous solution) is 0.05g: 1L, take two parts of the carbon nanotube composite material modified by glutamic acid prepared in Example 1, add Concentrations of 25mg / L and 75mg / L lead ion aqueous solution (the volume of the solution is 100mL), mix well, and carry out constant temperature oscillation treatment at 180rpm and 25°C for 24h to complete the treatment of the lead ion aqueous solution. After the shaking treatment was finished, let it stand for precipitation, take the supernatant and measure the concentration of lead by atomic absorption spectrophotometry, and calculate the adsorption amount of lead by the carbo...

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Abstract

The invention discloses a glutamic acid modified carbon nanotube composite as well as a preparation method and an application thereof. The composite contains carbon nanotubes, surfaces of the carbon nanotubes are modified with glutamic acid, and the mass content of the carboxyl in the composite is 2%-3%. The preparation method comprises the following steps: oxidation treatment of the carbon nanotubes, preparation of activated carbon nanotube intermediates, and mixing and reaction of the activated carbon nanotube intermediates with a glutamic acid solution to prepare the glutamic acid modifiedcarbon nanotube composite. The composite has the advantages of stable structure, high adsorption ability, good biocompatibility and high practical application value, and the preparation method has theadvantages of being simple in process, easy to operate, mild and controllable in response condition, low in cost, low in energy consumption, short in consumed time and the like. The composite can beused for adsorbing dye and heavy metals in water, has remarkable adsorption removal effect, has higher application value in treatment of polluted water, and has wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental nano new functional materials, and relates to a glutamic acid-modified carbon nanotube composite material and a preparation method and application thereof. Background technique [0002] With the development of industry and agriculture and the expansion of urban construction scale, a large amount of domestic sewage, industrial wastewater, industrial waste residue, construction waste, chemical fertilizers and pesticides, etc. are discharged into lakes, rivers and wetland systems, causing serious pollution of the wetland environment. Therefore, it is urgent to take appropriate disposal measures to effectively control the polluted wetland water and sediment, and the development of new functional nanomaterials with high adsorption capacity for pollutants and low ecological toxicity risk is of great importance to wetland pollution control. value and meaning. [0003] As a typical one-dimensional ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/30C02F101/20
CPCB01J20/20B01J20/22B01J2220/46B01J2220/4806B01J2220/4812C02F1/283C02F1/285C02F2101/20C02F2101/308
Inventor 晏铭宋彪曾光明龚继来谭婷院张鹏曹伟成李娟唐旺旺冯浩鹏
Owner HUNAN UNIV
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