Preparation method and application of bamboo-like magnetic nitrogen/metal cobalt doped carbon nanotube material

A technology of carbon nanotubes and metal cobalt, which is applied in the direction of carbon nanotubes, nanocarbons, alkali metal compounds, etc., can solve the problems of cumbersome, unfavorable large-scale production, and affecting applications, so as to improve dispersibility, facilitate separation and reuse , the effect of good mechanical stability

Inactive Publication Date: 2020-04-28
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, most of the existing methods for preparing magnetic solid-phase extraction adsorbents are cumbersome, which is not conducive to large-scale production, thereby affecting its practical application.

Method used

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  • Preparation method and application of bamboo-like magnetic nitrogen/metal cobalt doped carbon nanotube material
  • Preparation method and application of bamboo-like magnetic nitrogen/metal cobalt doped carbon nanotube material
  • Preparation method and application of bamboo-like magnetic nitrogen/metal cobalt doped carbon nanotube material

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Embodiment 1

[0020] A preparation method of a bamboo-shaped magnetic nitrogen / metal cobalt doped carbon nanotube material, comprising the following steps:

[0021] 1) Mix 2.0 g melamine with 0.5 g CoCl 2 2H 2 O was mixed in a 30 mL crucible, added 2 mL of absolute ethanol and stirred to dissolve, and dried in a blast oven at 70 °C until the ethanol evaporated completely.

[0022] 2) Place the crucible in step 1) in a tube furnace, and continuously feed argon gas at a rate of 80 mL / min. After rising to 200 °C at a rate of 7 °C / min, keep for 2 h. Then it was raised to 1000°C at a rate of 7°C / min and calcined at 1000°C for two hours. Afterwards, the temperature was lowered to room temperature at a rate of 5°C / min, and the argon gas was turned off. A black solid will be obtained.

[0023] 3) The black solid obtained in step 2) was placed in a beaker filled with 1 mol / L hydrochloric acid and stirred at a speed of 180 r / min for 4 h, washed alternately with deionized water and absolute ethan...

Embodiment 2

[0026] A preparation method of a bamboo-shaped magnetic nitrogen / metal cobalt doped carbon nanotube material, comprising the following steps:

[0027] 1) Mix 3.0 g urea with 0.5 g CoCl 2 2H 2 O was mixed in a 30 mL crucible, added 2 mL of absolute ethanol and stirred to dissolve, and dried in a blast oven at 70 °C until the ethanol evaporated completely.

[0028] 2) Place the crucible in step 1) in a tube furnace, and continuously feed argon gas at a rate of 80 mL / min. After rising to 200 °C at a rate of 7 °C / min, keep for 2 h. Then it was raised to 1000°C at a rate of 7°C / min and calcined at 1000°C for two hours. Afterwards, the temperature was lowered to room temperature at a rate of 5°C / min, and the argon gas was turned off. A black solid will be obtained.

[0029] 3) The black solid obtained in step 2) was placed in a beaker filled with 1 mol / L hydrochloric acid and stirred at a speed of 180 r / min for 4 h, washed alternately with deionized water and absolute ethanol t...

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Abstract

The invention discloses a preparation method of a bamboo-like nitrogen / metal cobalt doped carbon nanotube material as a magnetic solid-phase extraction adsorbent and application of the bamboo-like nitrogen / metal cobalt doped carbon nanotube material in adsorption and enrichment of okadaic acid. The specific surface area of the bamboo-like nitrogen / metal cobalt doped carbon nanotube material disclosed by the invention reaches 154 cm<3> / g; the nitrogen element is doped, so that the material has a large number of adsorption sites; [pi] electrons on the carbon nanotubes and [pi] electrons on the okadaic acid can form pi-pi conjugation; the nitrogen element and the okadaic acid can adsorb the okadaic acid through hydrogen-bond interaction. In addition, the bamboo-like structure enables the okadaic acid to have excellent structural stability, thermal stability and chemical stability, and meanwhile, the okadaic acid has the characteristic of magnetism and is also beneficial to adsorption of subsequent separation work. When the adsorbent is applied to adsorption and enrichment of okadaic acid in the okadaic field, the effects of rapid adsorption (5 min) and rapid desorption (15 min) can beachieved.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotube materials, and in particular relates to a preparation method of a bamboo-shaped magnetic nitrogen / metal cobalt doped carbon nanotube material and its application in adsorption and enrichment of okada spongic acid. Background technique [0002] Okadaspongic acid (OA) is a fat-soluble secondary metabolite produced by algae or microorganisms in the ocean. It is the main active ingredient of Diarrheal Shellfish Poisoning (DSP), which can accumulate in bivalve molluscs such as mussels, scallops, and oysters. If humans ingest shellfish contaminated by OA, it will cause severe intestinal inflammation and diarrhea, so it is necessary to monitor the OA content in shellfish. However, the concentration of OA in shellfish samples is relatively low, and the sample matrix is ​​relatively complex, which makes it difficult to detect. Pretreatment of the samples is required to adsorb and enrich OA. [00...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C01B32/16B01D15/08
CPCB01D15/08B01J20/02B01J20/0259B01J20/20B01J20/28009B01J2220/42B01J2220/4806B01J2220/4812C01B32/16
Inventor 张兰刘冠城陈晖
Owner FUZHOU UNIV
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