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Preparation method of nitrogen-doped carbon nanotube compositing TiO2 composite material

A technology of nanotube compounding and nitrogen-doped carbon, which is applied in the field of nanomaterials, can solve the problems of difficult separation and recovery, and achieve the effects of overcoming separation and recovery, superior photocatalytic performance, enhanced photocatalytic activity and photocatalytic reaction

Inactive Publication Date: 2019-03-29
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to: provide a preparation method of nitrogen-doped carbon nanotube composite titanium dioxide composite material, which can effectively reduce the problem that carbon nanotubes are extremely prone to agglomeration, and at the same time enhance the photocatalytic activity. Not only that, by combining titanium dioxide with nitrogen Doped carbon nanotube composite can overcome the problem of difficult separation and recovery of titanium dioxide in the process of use, and at the same time, it has obvious catalytic degradation effect under the condition of ultraviolet light

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Embodiment 1

[0029] A preparation method of nitrogen-doped carbon nanotube composite titanium dioxide composite material, comprising the steps of:

[0030] S1. Pretreatment of carbon nanotube materials: add carbon nanotubes to the mixed solution of sulfuric acid and nitric acid, the volume ratio of sulfuric acid and nitric acid in the mixed solution is 1:4, and then under the condition of water bath, the temperature of the water bath is 90 ° C, reflux and stir Reaction, reflux and stirring during the reaction process, the stirring time is 3h, the stirring speed is 500r / min, hydrogen peroxide and deionized water are added, centrifuged, washed with acetone solution, and dried to obtain the pretreated carbon nanotube material;

[0031] SEM images of carbon nanotubes before and after the above step S1 pretreatment figure 1 As shown, a and b in the figure are the 100nm and 400nm SEM images of carbon nanotubes before pretreatment, respectively, and c in the figure is the 400nm SEM image of carbo...

Embodiment 2

[0037] A preparation method of nitrogen-doped carbon nanotube composite titanium dioxide composite material, comprising the steps of:

[0038]S1. Pretreatment of carbon nanotube materials: add carbon nanotubes to the mixed solution of sulfuric acid and nitric acid, the volume ratio of sulfuric acid and nitric acid in the mixed solution is 1:4, and then under the condition of water bath, the temperature of the water bath is 95 ° C, reflux and stir Reaction, reflux and stirring During the reaction process, the stirring time is 4 hours, the stirring speed is 600r / min, hydrogen peroxide and deionized water are added, centrifuged, washed with acetone solution, and dried to obtain the pretreated carbon nanotube material;

[0039] S2. Preparation of nitrogen-doped carbon nanotube material: Add the carbon nanotubes and ammonia water obtained in step S1 into the reactor, the mass ratio of ammonia water and pretreated carbon nanotubes is 8:1, stir evenly, and the stirring is completed A...

Embodiment 3

[0042] A preparation method of nitrogen-doped carbon nanotube composite titanium dioxide composite material, comprising the steps of:

[0043] S1. Pretreatment of carbon nanotube materials: Add carbon nanotubes to the mixed solution of sulfuric acid and nitric acid. The volume ratio of sulfuric acid and nitric acid in the mixed solution is 1:4. Then, under the condition of water bath, the temperature of the water bath is 100 ℃, reflux and stir Reaction, reflux and stirring During the reaction process, the stirring time is 5 hours, the stirring speed is 700r / min, hydrogen peroxide and deionized water are added, centrifuged, washed with acetone solution, and dried to obtain the pretreated carbon nanotube material;

[0044] S2. Preparation of nitrogen-doped carbon nanotube material: Add the carbon nanotubes and ammonia water obtained in step S1 into the reactor, the mass ratio of ammonia water and pretreated carbon nanotubes is 10:1, stir evenly, and the stirring is completed Fin...

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Abstract

The invention provides a preparation method of a nitrogen-doped carbon nanotube compositing TiO2 composite material. The method includes: pretreating a carbon nanotube material at first; then performing a reaction with the carbon nanotube and ammonia water to prepare a nitrogen-doped carbon nanotube material; finally adding TiO2 to direct prepare the nitrogen-doped carbon nanotube compositing TiO2composite material, which can effectively solve the problem that carbon nanotubes are quite liable to aggregate. Not only that, by compounding the TiO2 with the nitrogen-doped carbon nanotubes, the product can overcome the problem that TiO2, during use, is difficult to separate and recycle; meanwhile, under ultraviolet irradiation, more excellent catalytic degradation effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a preparation method of a nitrogen-doped carbon nanotube composite titanium dioxide composite material. Background technique [0002] The research of carbon nanotubes is very attractive in the current field of nanomaterials research. It has a series of advantages: high mechanical strength, large specific surface area, high electrical conductivity, strong interface effect, etc. However, carbon nanotubes themselves There is a strong intermolecular force between them, and they are very easy to agglomerate, which seriously affects their uniform dispersion ability in materials and other solvents. Not only that, but also the chemical inertness of carbon nanotubes, which leads to their great popularity in applications. limit. [0003] Nano-titanium dioxide photocatalyst has relatively unique physical and chemical properties, such as small size effect, surface ef...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10
CPCB01J27/24B01J35/61B01J35/39
Inventor 廖梓龙郑漫
Owner DONGGUAN UNIV OF TECH
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