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Alumina-modified multi-walled carbon nanotube nanocomposite material and its preparation method and application

A technology of multi-walled carbon nanotubes and nanocomposites, which is applied in the field of materials and the environment, can solve problems such as poor stability, difficulty in agglomeration, and easy agglomeration of multi-walled carbon nanotubes, so as to improve processing efficiency and adsorption capacity, and increase specific The effect of surface area

Active Publication Date: 2017-10-13
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved in the present invention is to overcome the deficiencies of the prior art, provide a multi-walled carbon nanotube nanocomposite material modified by alumina with large adsorption capacity, high adsorption efficiency, not easy to agglomerate, and high stability, and also provide a A method for preparing an alumina-modified multi-walled carbon nanotube nanocomposite material with a simple preparation process, and at the same time provides an application of the alumina-modified multi-walled carbon nanotube nanocomposite material to remove cadmium and / or trichlorethylene in water bodies. Overcome the shortcomings of simple multi-walled carbon nanotubes that are easy to agglomerate and have poor stability in aqueous solution

Method used

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  • Alumina-modified multi-walled carbon nanotube nanocomposite material and its preparation method and application
  • Alumina-modified multi-walled carbon nanotube nanocomposite material and its preparation method and application
  • Alumina-modified multi-walled carbon nanotube nanocomposite material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A multi-wall carbon nanotube nanocomposite material modified by alumina comprises nano-alumina and multi-wall carbon nanotubes, and the nano-alumina is loaded on the multi-wall carbon nanotubes to form a network structure together, and the diameters thereof are distributed in the range of 40-70nm.

[0040] The preparation method of the multi-walled carbon nanotube nanocomposite material modified by alumina specifically includes the following steps:

[0041] (1) Preparation of acidified multi-walled carbon nanotubes:

[0042] 1-1: Take 2.5g of multi-walled carbon nanotubes, acidify with 67% concentrated nitric acid at 70°C for 24h, then acidify with 40.0% hydrofluoric acid at 70°C for 24h, and finally wash with deionized water , filtered until the pH of the filtrate is close to 7, the solid is filtered out, dried and ground into powder.

[0043] 1-2: Mix concentrated nitric acid with a concentration of 67% and concentrated sulfuric acid with a concentration of 96% at a ...

Embodiment 2

[0057] Embodiment 2: An application of the alumina-modified multi-walled carbon nanotube nanocomposite material of Embodiment 1 to remove divalent cadmium and trichlorethylene (TCE) in water.

[0058] Set 5 pieces of 1m respectively 3 In the treatment tank, the aqueous solution is discharged into the aforementioned treatment tank. After testing, in the aqueous solution in the treatment tank, the concentration of divalent cadmium is 1.028 mg / L; the concentration of TCE is 1.089 mg / L. In the 5 treatment pools, add respectively the multi-walled carbon nanotube nanocomposite material modified by aluminum oxide of Example 1, the acidified multi-walled carbon nanotube of Comparative Example 1, which is 17 times the total mass of cadmium and TCE, according to Example 1 The acidified multi-walled carbon nanotubes, aluminum oxide raw material, and multi-walled carbon nanotubes raw materials prepared by the method in step (1), after stirring for 24h, use a filter membrane with an apertu...

Embodiment 3

[0063]Example 3: To investigate the effect of the addition amount of alumina-modified multi-walled carbon nanotube nanocomposite material on the removal rate of cadmium and TCE pollutants in water.

[0064] In order to better reflect the relationship between the amount of alumina-modified multi-walled carbon nanotube nanocomposites and the pollution of cadmium and TCE in water. The present invention also studies the effect of the multi-walled carbon nanotube nanocomposite material modified with alumina in Example 1 on the adsorption efficiency of different concentrations of cadmium and TCE in water. The experimental process is as follows:

[0065] Set up six 1m 3 In the treatment tank, the aqueous solution is discharged into the aforementioned treatment tank. After testing, in the aqueous solution in the treatment tank, the concentration of divalent cadmium is 1.028 mg / L; the concentration of TCE is 1.089 mg / L. The multi-walled carbon nanotube nanocomposite material modified...

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Abstract

The invention discloses an aluminum oxide modified multiwalled carbon nanotube nano composite material as well as a preparation method and application thereof. The aluminum oxide modified multiwalled carbon nanotube nano composite material comprises nano aluminum oxide and multiwalled carbon nanotubes, wherein the nano aluminum oxide is loaded on the multiwalled carbon nanotubes to commonly form a net-shaped structure; and the mass percent content of the multiwalled carbon nanotubes in the aluminum oxide modified multiwalled carbon nanotube nano composite material is 40%-50%. The preparation method comprises the following steps: acidifying, loading of aluminum oxide and sintering. The aluminum oxide modified multiwalled carbon nanotube nano composite material has a nano-grade size and has the characteristics that the hydrophily is good, the material is easy to stably disperse in a water solution and a plurality of active radicals exist on the surface, so that the aluminum oxide modified multiwalled carbon nanotube nano composite material has the advantages of large adsorption capacity and high adsorption efficiency; and heavy metal cadmium and an organic matter trichloroethylene in a water body can be efficiently removed.

Description

technical field [0001] The invention relates to the field of materials and environment, in particular to an alumina-modified multi-wall carbon nanotube nanocomposite material and a preparation method thereof, and also relates to an alumina-modified multi-wall carbon nanotube nanocomposite material for treating cadmium in water And the application of trichlorethylene. Background technique [0002] In recent years, with the rapid development of the economy and the extensive use of chemical reagents in the industrial and agricultural fields, most of the surface water and groundwater in my country have been polluted to varying degrees, and the pollutants include heavy metals and organic substances. If the polluted water body is not treated or treated properly, it will cause serious harm to public health and the ecological environment. For example: heavy metal cadmium ion (II) is the main pollutant in the water body and cannot be biodegraded. The biological half-life in the orga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F1/62C02F1/58C02F101/36
CPCB01J20/205B01J20/28002B01J20/28057B01J2220/4806C02F1/281C02F2101/20C02F2101/36
Inventor 刘俊锋梁婕袁兴中董浩然武海鹏曾光明向鸿宇
Owner HUNAN UNIV
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