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Preparation method and application of graphene/carbon nano-tube composite

A technology of carbon nanotubes and composite materials, which is applied in the field of preparation of graphene/carbon nanotube composite materials, can solve problems such as uneven dispersion and cumbersome preparation process, and achieve good adsorption performance, simple method, and large specific surface area. Effect

Active Publication Date: 2017-06-20
HEBEI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] One of the purposes of the present invention is to provide a preparation method of graphene / carbon nanotube composite material, to solve the existing preparation method process is loaded down with trivial details, is physical doping between graphene and carbon nanotube, the problems such as uneven dispersion

Method used

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  • Preparation method and application of graphene/carbon nano-tube composite
  • Preparation method and application of graphene/carbon nano-tube composite
  • Preparation method and application of graphene/carbon nano-tube composite

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Under stirring conditions, add 0.857 g of graphite powder and 0.143 g of multi-walled carbon nanotubes into 45 mL of concentrated sulfuric acid with a concentration of 98% in an ice-water bath, stir and disperse for 0.5 h, then slowly add 3 g of potassium permanganate, and stir After 1 h, the ice-water bath was removed, and stirring was continued at room temperature for 24 h; then, under the condition of ice-water bath, 65 mL of deionized water was added to the system, stirred for 2 h, and then 5 mL of 30% hydrogen peroxide and the remaining React with potassium permanganate, stir for 2 h, add deionized water and centrifuge to obtain co-oxidized graphite oxide and carbon nanotube oxide.

[0035] The graphite oxide and carbon oxide nanotubes obtained after centrifugation were added to 600 mL of deionized water for ultrasonic exfoliation and dispersion. The ultrasonic power was 150 W, the ultrasonic frequency was 45 kHz, and the ultrasonic time was 2 h. The graphite oxide ...

Embodiment 2

[0039]Add 1.905 g of graphite powder and 0.095 g of multi-walled carbon nanotubes into 140 mL of concentrated sulfuric acid with a concentration of 98% in an ice-water bath under stirring, stir and disperse for 3 h, then slowly add 12 g of potassium permanganate, and stir for 2 h Then remove the ice-water bath, and continue to stir at room temperature for 6 h; then add 200 mL of deionized water to the system under the condition of ice-water bath, stir for 1 h, then add 20 mL of hydrogen peroxide to react with excess potassium permanganate, and stir for 3 h , and then add deionized water and centrifuge to obtain co-oxidized graphite oxide and carbon nanotube oxide.

[0040] The graphite oxide and carbon oxide nanotubes obtained after centrifugation were added to 1000 mL of deionized water for ultrasonic exfoliation and dispersion. The ultrasonic power was 100 W, the ultrasonic frequency was 100 kHz, and the ultrasonic time was 4 h, so that graphite oxide was exfoliated into grap...

Embodiment 3

[0043] Add 0.8 g of graphite powder and 0.2 g of multi-walled carbon nanotubes into 45 mL of concentrated sulfuric acid with a concentration of 98% and 15 mL of concentrated nitric acid with a concentration of 65% under stirring. The concentrated acid is placed in an ice-water bath, stirred and dispersed for 1 h, then slowly added 4 g of potassium permanganate, stirred for 0.5 h, removed the ice-water bath, and stirred at room temperature for 48 h; then, under the condition of ice-water bath, added 70 mL of deionized water to the system, stirred for 1 h, and then added 8 mL of hydrogen peroxide was reacted with excess potassium permanganate, stirred for 2 h, and then deionized water was added for centrifugation to obtain co-oxidized graphite oxide and carbon nanotubes.

[0044] The graphite oxide and carbon oxide nanotubes obtained after centrifugation were added to 500 mL of deionized water for ultrasonic exfoliation and dispersion. The ultrasonic power was 600 W, the ultrason...

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Abstract

The invention provides a preparation method and application of a graphene / carbon nano-tube composite. The preparation method comprises the following steps: oxidizing graphene powder and a multiwalled carbon nano-tube together to obtain graphene oxide and an oxidized carbon nano-tube; carrying out ultrasonic peeling and dispersion on the graphene oxide and the oxidized carbon nano-tube; carrying out modification connection and reduction on the graphene oxide and the oxidized carbon nano-tube with ammonia water and ethylenediamine; and filtering, washing and drying a product after reaction to obtain the graphene / carbon nano-tube composite. The preparation method is simple and convenient, and reaction conditions are mild; in the preparation method, the graphene is connected with the carbon nano-tube through covalent modification, and the carbon nano-tube is connected between graphene slice layers. The graphene / carbon nano-tube composite prepared by the method has a fluffy and porous three-dimensional skeleton structure, and can be used for extracting and detecting melamine, clenbuterol, sulfadimidine sodium, indoleacetic acid, bambuterol, clorprenaline, dicofol, 2,2-bis(4-chlorophenyl)-1,1-dichloroethane or chlorofluoro thiochromanone.

Description

technical field [0001] The invention relates to a preparation method and application of a composite material, in particular to a preparation method and application of a graphene / carbon nanotube composite material. Background technique [0002] As a two-dimensional carbon nanomaterial, graphene has the advantages of large specific surface area, good mechanical properties, stable chemical properties, and large π-π conjugated system. It can be used as an adsorbent material and has been widely used in aromatic compounds, heavy metals, etc. Extraction and separation of ions and proteins. However, the special two-dimensional planar structure of graphene is easy to aggregate and agglomerate, resulting in a decrease in its specific surface area, which limits the application and development of graphene materials. [0003] Carbon nanotubes are one-dimensional carbon nanomaterials that can be doped into graphene sheets as supports between graphene sheets, thereby avoiding the aggregat...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/281B01D15/26C01B32/168C01B32/184G01N30/06G01N30/02
CPCB01D15/265B01J20/20B01J20/205B01J20/281B01J2220/80C01P2002/82C01P2002/85C01P2004/03C01P2006/12G01N30/02G01N30/06G01N2030/062
Inventor 闫宏远苑亚楠乔凤霞白立改刘海燕
Owner HEBEI UNIVERSITY
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