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Preparation method and application of Beta-cyclodextrin grafted carbon nano tube adsorbing material

A carbon nanotube and adsorption material technology, which is applied in the field of nanometer new materials and environmental protection, can solve the problems of low saturated adsorption capacity, harsh conditions, and many steps, and achieves low equipment requirements, enhanced adsorption capacity, and cheap and easy-to-obtain raw materials. Effect

Inactive Publication Date: 2012-09-26
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method has the following disadvantages: 1) there are many steps, and the operation is troublesome; 2) a large amount of highly toxic organic solvents, such as THF (tetrahydrofuran), are used in the experimental process, which is not environmentally friendly and expensive, and is not suitable for mass production and industrial applications.
[0005] (1) The saturated adsorption capacity is low;
[0006] (2) The modification steps of carbon nanotubes are cumbersome, require anaerobic operation, harsh conditions, and use a large amount of highly toxic organic solvents, the process is expensive and not conducive to environmental protection

Method used

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  • Preparation method and application of Beta-cyclodextrin grafted carbon nano tube adsorbing material
  • Preparation method and application of Beta-cyclodextrin grafted carbon nano tube adsorbing material

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Experimental program
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Effect test

Embodiment 1

[0020] Put 0.5g of carbon nanotubes into 100mL of potassium permanganate solution (0.01mol / L), ultrasonically disperse at room temperature for 10min, then heat the mixture to reflux for 2h, after cooling, filter it with a sand core funnel, and then use distilled water repeatedly Rinse and filter three times, put the carbon nanotubes into a vacuum drying oven and dry at 80°C to obtain oxidized carbon nanotubes, which are designated as CNTs-ox.

[0021] Put 0.1g of CNTs-ox into 80mL of β-cyclodextrin aqueous solution, ultrasonically disperse for 10min, then heat and reflux under magnetic stirring for 1h, centrifuge to discard the upper layer solution, then wash repeatedly with distilled water, centrifuge 7 times, vacuum at 80℃ After drying, the cyclodextrin-grafted carbon nanotube adsorption material is obtained, which is denoted as CNTs-β-CD.

Embodiment 2

[0023] Put 1g of carbon nanotubes into 100mL of potassium permanganate solution (0.1mol / L), ultrasonically disperse at room temperature for 10min, then heat the mixture to reflux for 5h, after cooling, filter with a sand core funnel, and rinse repeatedly with distilled water , suction filtration 3 times, put the carbon nanotubes into a vacuum drying oven at 100° C. to dry to obtain oxidized carbon nanotubes, denoted as CNTs-ox.

[0024] Put 0.1g of CNTs-ox into 50mL of β-cyclodextrin aqueous solution, ultrasonically disperse for 60min, then heat and reflux under magnetic stirring for 8h, centrifuge to discard the upper layer solution, then wash repeatedly with distilled water, centrifuge 7 times, and vacuum at 180℃ After drying, the cyclodextrin-grafted carbon nanotube adsorption material is obtained, which is denoted as CNTs-β-CD.

Embodiment 3

[0026] Put 1.5g of carbon nanotubes into 100mL of potassium permanganate solution (0.3mol / L), ultrasonically disperse at room temperature for 50min, then heat the mixture to reflux for 6h, after cooling, filter it with a sand core funnel, and then use distilled water repeatedly Rinse and filter three times, put the carbon nanotubes into a vacuum drying oven and dry at 120°C to obtain oxidized carbon nanotubes, which are designated as CNTs-ox.

[0027] Put 0.1g of CNTs-ox into 20mL of β-cyclodextrin aqueous solution, ultrasonically disperse for 30min, then heat and reflux under magnetic stirring for 10h, centrifuge to discard the upper layer solution, then rinse repeatedly with distilled water, centrifuge 7 times, vacuum at 60℃ After drying, the cyclodextrin-grafted carbon nanotube adsorption material is obtained, which is denoted as CNTs-β-CD.

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Abstract

The invention provides a preparation method and an application of Beta-cyclodextrin grafted carbon nano tube adsorbing material and belongs to the technical field of novel nano material and environmental protection. In order to solve the problem that the carbon nano tube is easy to aggregate and is poor in dispersivity, the invention adopts cheap and degradable amphipathic supramolecular Beta-cyclodextrin to synthesize Beta-cyclodextrin grafted carbon nano tube (CNTs-Beta-CD) composite efficient adsorbing material which has an excellent effect on removing heavy metal ions in waste water. The method has the advantages of simple preparation technology, mild conditions, no pollution, low cost, environment-friendliness, and high efficiency, and is suitable for industrial production and application.

Description

(1) Technical field [0001] The invention relates to a composite material of novel beta-cyclodextrin grafted carbon nanotubes, which is used for absorbing heavy metal ions in water, and belongs to the technical field of new nanometer materials and environmental protection. (2) Background technology [0002] With the rapid development of contemporary industry, environmental problems are becoming more and more serious. Heavy metal pollution leads to the decline of water quality, which seriously threatens the health of aquatic organisms and human beings. Adsorbent adsorption method is a method of small equipment investment, simple operation, and has been widely used to remove trace heavy metal ions in sewage. The key to this method is to find and develop adsorption materials with large adsorption capacity, high efficiency, and no secondary pollution . [0003] As a new type of high-efficiency adsorption material, the application research of carbon nanotubes in the field of env...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/26C02F1/28C02F1/62
Inventor 蒋峰芝王曙光张学嘉刘拥军桂阿蒙
Owner YUNNAN UNIV
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