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Preparation method and application of modified carbon nanotube adsorbent

A technology of magnetic carbon nanotubes and multi-walled carbon nanotubes, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as poor adhesion uniformity and low adsorption capacity of metal ions, and achieve adhesion Strong junction, convenient magnetization and cross-linking treatment, corrosion resistance to chemical media

Active Publication Date: 2019-11-15
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome the defect that the carbon nanotube adsorbent has low adsorption capacity to metal ions caused by the poor adhesion uniformity of iron oxide in the prior art, thereby providing a modified carbon nanotube adsorbent The preparation method and its application

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  • Preparation method and application of modified carbon nanotube adsorbent
  • Preparation method and application of modified carbon nanotube adsorbent
  • Preparation method and application of modified carbon nanotube adsorbent

Examples

Experimental program
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Embodiment 1

[0030] This embodiment provides a method for preparing a modified carbon nanotube adsorbent, comprising the following steps:

[0031] (1) Purification steps: first use an analytical balance to accurately weigh 6g of multi-walled carbon nanotubes and place them in a beaker, add a mixed acid solution of 180ml of concentrated sulfuric acid and 60ml of concentrated nitric acid, ultrasonically disperse for 35min at room temperature, and then disperse at 80°C at 800r / min speed, stirred with a magnetic stirring device for 3 hours, after standing for 12 hours once, diluted 8 times with pure water, and stood for 10 hours for the second time, then washed the precipitate alternately with ultrapure water and absolute ethanol and suction filtered , in a constant-temperature vacuum drying oven at 80°C for 12 hours at a constant temperature and then grind evenly to obtain purified multi-walled carbon nanotubes;

[0032] (2) Magnetization step: take 1 g of purified multi-walled carbon nanotu...

Embodiment 2

[0036] This embodiment provides a method for preparing a modified carbon nanotube adsorbent, comprising the following steps:

[0037](1) Purification steps: first use an analytical balance to accurately weigh 6g of multi-walled carbon nanotubes and place them in a beaker, add a mixed acid solution of 200ml of concentrated sulfuric acid and 70ml of concentrated nitric acid, ultrasonically disperse for 50min at room temperature, and then disperse at 90°C at 1000r / min speed, stir with a magnetic stirring device for 4 hours, after standing for 15 hours once, dilute 10 times with pure water, and let stand for 12 hours for the second time, then alternately wash the precipitate with ultrapure water and absolute ethanol and suction filter , and then in a constant temperature vacuum drying oven, carry out constant temperature drying at 90° C. for 15 hours, and then grind evenly to obtain purified multi-walled carbon nanotubes;

[0038] (2) Magnetization step: take 1 g of purified mult...

Embodiment 3

[0042] This embodiment provides a method for preparing a modified carbon nanotube adsorbent, comprising the following steps:

[0043] (1) Purification steps: first use an analytical balance to accurately weigh 6g of multi-walled carbon nanotubes and place them in a beaker, add a mixed acid solution of 200ml of concentrated sulfuric acid and 70ml of concentrated nitric acid, ultrasonically disperse for 50min at room temperature, and then disperse at 90°C at 1000r / min speed, stir with a magnetic stirring device for 4 hours, after standing for 15 hours once, dilute 10 times with pure water, and let stand for 12 hours for the second time, then alternately wash the precipitate with ultrapure water and absolute ethanol and suction filter , and then in a constant temperature vacuum drying oven, carry out constant temperature drying at 90° C. for 15 hours, and then grind evenly to obtain purified multi-walled carbon nanotubes;

[0044] (2) Magnetization step: take 1 g of purified mul...

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Abstract

The invention relates to the technical field of water treatment and provides a preparation method of a modified carbon nanotube adsorbent. The preparation method comprises the following steps: executing purification to obtain purified multi-walled carbon nanotubes, executing magnetizing to obtain magnetic carbon nanotubes, and executing crosslinking to obtain crosslinked magnetic carbon nanotubes;the modified carbon nanotube adsorbent is prepared by a modification step, the steps are matched with one another, so that the supporting amount of ferroferric oxide is remarkably increased, the ferroferric oxide is uniformly attached to the carbon nanotubes, and the adsorption effect of the modified carbon nanotube adsorbent on metal ions is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a preparation method and application of a modified carbon nanotube adsorbent. Background technique [0002] With the development of the national economy, the content and types of pollutants in daily life and production water have increased, causing different degrees of pollution to the ecological environment and water resources in different regions, which has a serious impact on the environment. Generally speaking, metal ion pollution contains certain toxicity. If metal ion wastewater is discharged into rivers and enters drinking water sources or food links through natural processes, it will directly threaten human health. In the development of metals and the treatment of wastewater metals, the adsorption method is widely used because of its simple operation, high economic benefits, and fast reaction rate. [0003] For example, the Chinese patent document CN105749881A di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/205B01J20/06B01J20/28009B01J20/22B01J20/0266C02F1/281B01J2220/4806B01J2220/4812C02F2101/20
Inventor 黄万抚曾祥荣赵冰心黄李金鸿李新冬胡运祯张天锡
Owner JIANGXI UNIV OF SCI & TECH
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