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Preparation method and application of single-walled carbon nanotube flexible film capable of realizing high adsorption of organic dyes

A technology of single-wall carbon nanotubes and organic dyes, applied in chemical instruments and methods, adsorption water/sewage treatment, inorganic chemistry, etc., can solve the problems of secondary pollution adsorption materials, non-reusable, etc., achieve simple process, solve Non-reusable, high-efficiency adsorption effect

Inactive Publication Date: 2018-01-12
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method and application of a flexible film of single-walled carbon nanotubes with high adsorption of organic dyes, and to prepare recyclable and reversible single-walled carbon nanotubes for absorbing and desorbing organic dyes Nanotube flexible film solves the problem of secondary pollution introduced by nanocarbon material powder as an adsorbent and other adsorption materials cannot be reused, so as to obtain flexible single-walled carbon nanotubes with high adsorption performance, reusability, environmental friendliness and stable performance membrane

Method used

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  • Preparation method and application of single-walled carbon nanotube flexible film capable of realizing high adsorption of organic dyes
  • Preparation method and application of single-walled carbon nanotube flexible film capable of realizing high adsorption of organic dyes
  • Preparation method and application of single-walled carbon nanotube flexible film capable of realizing high adsorption of organic dyes

Examples

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Effect test

Embodiment 1

[0034] Preparation of single-walled carbon nanotube flexible film: Add 20 mg of the original sample of single-walled carbon nanotubes prepared by floating catalyst chemical vapor deposition to 200 mL of ethanol solution, and ultrasonically disperse for 30 min. Then the carbon nanotube solution obtained by dispersing is suction-filtered into a film, and film samples of different sizes can be prepared according to the diameter of the filter device used ( figure 1 ), and the film-like sample has excellent flexibility ( figure 2 ). Scanning electron microscopy, thermogravimetric analysis, low-temperature liquid nitrogen adsorption and other structural characterizations were performed on pristine single-walled carbon nanotube samples. SEM ( image 3 ) observed that the sample was pure, the length of the carbon nanotubes was long and straight, and the length of the carbon nanotubes under the scanning electron microscope was 50-70 μm ( Figure 4 ). The differential thermal analy...

Embodiment 2

[0039] Preparation of single-walled carbon nanotube flexible film: Same as Example 1, the dispersant used in this example is acetone, the average length of single-walled carbon nanotube samples is 70-80 μm, the pore diameter is concentrated in 4-8 nm, and the specific surface area is 498 m 2 / g.

[0040] Adsorption performance of flexible, recyclable, high-performance adsorption film: Same as Example 1, the dye adsorbed in this example is rhodamine B, and the adsorption capacity of the adsorption film to rhodamine B reaches 190mg g -1 , the adsorption time is 240min (such as Figure 8 ).

[0041] The desorption performance of flexible, recyclable, high-performance adsorption film: same as Example 1, the desorption amount of this adsorption film to rhodamine B is 174mg g -1 , the desorption time is 10 hours.

Embodiment 3

[0043] Preparation of single-walled carbon nanotube flexible film: Same as Example 1, the dispersant used in this example is ethylene glycol, the average length of single-walled carbon nanotube samples is 80-90 μm, the pore diameter is concentrated in 4-9 nm, and the specific surface area 657m 2 / g.

[0044] Adsorption performance of flexible, recyclable, high-performance adsorption film: Same as in Example 1, the adsorbed dye in this example is methyl orange, and the adsorption capacity of the adsorption film to methyl orange reaches 130mg g -1 , the adsorption time is 240min (such as Figure 8 ).

[0045] The desorption performance of flexible, recyclable, high-performance adsorption membrane: same as Example 1, the desorption amount of this adsorption membrane to methyl orange is 121mg g -1 , the desorption time is 10 hours.

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Abstract

The invention specifically relates to a preparation method and application of a single-walled carbon nanotube flexible film capable of realizing high adsorption of organic dyes, belonging to the fieldof dye-adsorbing carbon nanotube flexible films. Single-walled carbon nanotubes prepared by using a floating catalyst chemical vapor deposition method are dispersed in an organic solvent, and then simple pumping filtration and drying are carried out so as to obtain the single-walled carbon nanotube film. The prepared single-walled carbon nanotube film has excellent flexibility and light weight, can efficiently adsorb organic dyes and is cyclically usable. The preparation method in the invention overcomes the problems that conventional carbon materials are low in organic dye adsorption quantity, usage of carbon material powder as an adsorbent easily leads to secondary pollution, etc. in the prior art; and the preparation method also overcomes limitations of conventional organic dye adsorption films in the aspects of weight, flexibility, cyclic usage, etc.

Description

technical field [0001] The invention relates to the field of carbon nanotube flexible film adsorption of dyes, in particular to a preparation method and application of a high-adsorption organic dye single-walled carbon nanotube flexible film. Background technique [0002] Organic dyes such as methylene blue, rhodamine B, methyl orange, and Congo red are widely used in the textile and food industries as commonly used dyes; however, organic dyes have disadvantages such as high toxicity, high carcinogenicity, and slow biodegradation. Therefore, how to remove organic dyes in industrial wastewater is an urgent problem facing the development of textile and food industries. At present, various methods have been developed, such as photocatalytic degradation, chemical degradation, Fenton-based oxidation, ozonation, etc. However, the above-mentioned technologies have problems such as poor selectivity, high cost, and non-reusability (Document 1. Ali, I. Chem. Rev., 2012, 112:5073. Doc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28C02F1/28B01J20/30
Inventor 栾健侯鹏翔刘畅成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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