Non-oxidative magnetic multi-wall carbon nanotube and preparation method as well as application thereof

A multi-walled carbon nanotube, non-oxidizing technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of limited application, difficult separation of carbon nanotubes, etc., reaching equilibrium time Short, magnetically stable, method-simple effect

Inactive Publication Date: 2012-08-29
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, carbon nanotubes are not easy to separate

Method used

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  • Non-oxidative magnetic multi-wall carbon nanotube and preparation method as well as application thereof
  • Non-oxidative magnetic multi-wall carbon nanotube and preparation method as well as application thereof
  • Non-oxidative magnetic multi-wall carbon nanotube and preparation method as well as application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] a kind of like figure 1 The shown non-oxidized magnetic multi-walled carbon nanotubes, the non-oxidized magnetic multi-walled carbon nanotubes are based on cross-linked non-oxidized multi-walled carbon nanotubes, and the substrate is loaded with magnetic iron oxide particles. In this embodiment The specific surface area of ​​non-oxidized magnetic multi-walled carbon nanotubes is 138.66m 2 / g, its saturation magnetization is 8.06emu / g.

[0035] The preparation method of the non-oxidized magnetic multi-walled carbon nanotubes of the present embodiment comprises the following steps:

[0036] (1) Under the protection of nitrogen, the non-oxidized multi-walled carbon nanotubes are added to the mixed solution of ferric ammonium sulfate and ferrous ammonium sulfate to obtain a suspension of non-oxidized multi-walled carbon nanotubes with a concentration of 5g / L, ferric ammonium sulfate The mixed solution with ferrous ammonium sulfate is mainly composed of (NH 4 ) 2 Fe(SO 4...

Embodiment 2

[0041] A method for removing pollutants with the non-oxidized magnetic multi-walled carbon nanotubes obtained in Example 1, comprising the following steps:

[0042] 10mg of non-oxidized magnetic multi-walled carbon nanotubes prepared in Example 1 were added to 2 groups of 50mL atrazine solutions or Cu 2+ In the solution, the initial concentration of atrazine in the atrazine solution is 5mg / L, Cu 2+ Cu in solution 2+ The initial concentration was 30 mg / L, and the pH value of each group of mixed solutions was adjusted to 6.0. Among the two groups of solutions for each pollutant, one group was not treated with ultrasonic treatment, and the other group was treated with ultrasonic treatment for 1 min. Place in a constant temperature oscillator in a water bath and vibrate for 24 hours at a temperature of 25°C and a rotational speed of 150 rpm to carry out an adsorption reaction for 24 hours, then use a magnet to separate the adsorbent from the solution, and use high performance liq...

Embodiment 3

[0047] Example 3: Using non-oxidized magnetic multi-walled carbon nanotubes to remove atrazine from water.

[0048] A method for removing atrazine in water bodies with different pH values ​​by utilizing the non-oxidized magnetic multi-walled carbon nanotubes obtained in Example 1, comprising the following steps:

[0049] 10 mg of non-oxidized magnetic multi-walled carbon nanotubes prepared in Example 1 were added to 7 groups of 50 mL atrazine solutions, the initial concentration of atrazine was 5 mg / L, and the pH value of each group of mixed solutions was adjusted respectively 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 and 9.0, after ultrasonic treatment for 1min, place in a water bath constant temperature oscillator at a constant temperature of 25°C, shake at a speed of 150rpm for adsorption reaction for 24h, and then use a magnet to separate the adsorbent from the solution Come out, and measure the residual atrazine concentration in the solution with high performance liquid chromatography...

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Abstract

The invention discloses a non-oxidative magnetic multi-wall carbon nanotube and a preparation method as well as application thereof. According to the adsorbent, mutually cross-linked non-oxidative multi-wall carbon nanotube is used as a matrix, and magnetic iron oxide particles are loaded on the matrix. The preparation method comprises the following steps of: adding the non-oxidative multi-wall carbon nanotube into mixed solution of ammonium ferric sulfate and ammonium ferrous sulfate under the protection of inert gas; performing ultrasonic dispersion; dropwise adding ammonia water at the time of ultrasonic dispersion; adjusting the pH value of suspension; fully stirring at a certain temperature and then cooling mixed solution; and separating precipitate, washing and drying. The application comprises the following steps of: adding the adsorbent into atrazine and/or copper ion solution; performing oscillation adsorption reaction under room temperature condition; and separating the adsorbent by using a magnet. The non-oxidative magnetic multi-wall carbon nanotube and the preparation method as well as application thereof disclosed by the invention have the advantages of easiness in operation, wide application range, stable magnetic property of the adsorbent, easiness for separation, high adsorption capacity, short balance time, reusability and the like.

Description

technical field [0001] The invention relates to the application of carbon nanotube materials and the fields of sewage treatment, in particular to a magnetic multi-walled carbon nanotube, its preparation method and its application in treating pollutants. Background technique [0002] Atrazine is a triazine pesticide with a relatively stable structure. Its mineralization process by microorganisms is very slow, and its half-retention period in soil is as long as 4 to 57 weeks. Since atrazine was registered, it has been widely used in countries all over the world. While the use of atrazine has brought benefits to agriculture, it has also had a certain impact on the environment. Currently, atrazine has been detected in surface water, groundwater, rivers, lakes, fruits and vegetables in many countries. Studies have shown that long-term exposure to atrazine-contaminated environments can affect the human immune system, lymphatic system, reproductive system, and endocrine system, an...

Claims

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Application Information

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IPC IPC(8): B01J20/00B01J20/28B01J20/30C02F1/28C02F101/20C02F101/38
Inventor 唐旺旺曾光明龚继来晏铭曾茁桐刘洋陈龙刘媛媛王喜洋张秀荣
Owner HUNAN UNIV
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