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Nitric oxide doped carbon nanotube coating solid-phase microextraction fiber obtained based on chemical bonding method and application of nitric oxide doped carbon nanotube coating solid-phase microextraction fiber to detection of aromatic amine

A carbon nanotube and fiber extraction technology, applied in chemical instruments and methods, other chemical processes, measuring devices, etc., can solve problems such as difficulties, and achieve the effect of overcoming thermal instability and rapid enrichment

Inactive Publication Date: 2020-09-25
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] As an adsorption material, nitrogen-doped carbon nanotubes have the advantages of large specific surface area and good stability. However, most carbon-based materials are electropositive, so there will be certain difficulties in adsorbing electropositive targets.

Method used

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  • Nitric oxide doped carbon nanotube coating solid-phase microextraction fiber obtained based on chemical bonding method and application of nitric oxide doped carbon nanotube coating solid-phase microextraction fiber to detection of aromatic amine
  • Nitric oxide doped carbon nanotube coating solid-phase microextraction fiber obtained based on chemical bonding method and application of nitric oxide doped carbon nanotube coating solid-phase microextraction fiber to detection of aromatic amine
  • Nitric oxide doped carbon nanotube coating solid-phase microextraction fiber obtained based on chemical bonding method and application of nitric oxide doped carbon nanotube coating solid-phase microextraction fiber to detection of aromatic amine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of synthetic method of ONCNTs material, it comprises the following steps:

[0036] 1) Preparation of N-CNTs

[0037] (a) 2.0 g of dimethylimidazole and 1.7 g of cobalt nitrate hexahydrate were dissolved in 40.0 mL of a mixture of methanol and ethanol (the volume ratio of methanol and ethanol was 1:1). After the above solution was magnetically stirred for 20 s, it was placed at room temperature for 20 h;

[0038] (b) The resulting product was washed 5 times with methanol, and centrifuged at 8000 rpm for 5 min;

[0039] (c) After the obtained solid was dried at 70°C for 24 h, the ZIF-67 material was obtained;

[0040] (d) Add 200.0 mg of ZIF-67 into the crucible and place it in a tube furnace at 1°C min -1 The rate is raised to 700°C, and H 2 , kept for 2 h, and then gradually lowered to room temperature; finally black N-CNTs powder was obtained.

[0041] 2) Preparation of ONCNTs material

[0042] (a) Suspend 100.0 mg N-CNTs sample in 200.0 mL of 30% H 2 o ...

Embodiment 2

[0050] 1) Preparation of N-CNTs

[0051] (a) 2.0 g of dimethylimidazole and 1.7 g of cobalt nitrate hexahydrate were dissolved in 40.0 mL of a mixture of methanol and ethanol (the volume ratio of methanol and ethanol was 1:1). After the above solution was magnetically stirred for 20 s, it was placed at room temperature for 20 h;

[0052] (b) The resulting product was washed 5 times with methanol, and centrifuged at 8000 rpm for 5 min;

[0053] (c) After the obtained solid was dried at 70°C for 24 h, the ZIF-67 material was obtained;

[0054] (d) Add 200.0 mg of ZIF-67 into the crucible and place it in a tube furnace at 1°C min -1 The rate is raised to 700°C, and H 2 , kept for 2 h, and then gradually lowered to room temperature; finally black N-CNTs powder was obtained.

[0055] 2) Preparation of ONCNTs material

[0056] (a) Suspend 100.0 mg N-CNTs sample in 200.0 mL of 10 mol L -1 HCl solution, and stirred at room temperature for 6 h;

[0057] (b) After the obtained s...

Embodiment 3

[0064] 1) Preparation of N-CNTs

[0065] (a) 2.0 g of dimethylimidazole and 1.7 g of cobalt nitrate hexahydrate were dissolved in 40.0 mL of a mixture of methanol and ethanol (the volume ratio of methanol and ethanol was 1:1). After the above solution was magnetically stirred for 20 s, it was placed at room temperature for 20 h;

[0066] (b) The resulting product was washed 5 times with methanol, and centrifuged at 8000 rpm for 5 min;

[0067] (c) After the obtained solid was dried at 70°C for 24 h, the ZIF-67 material was obtained;

[0068] (d) Add 200.0 mg of ZIF-67 into the crucible and place it in a tube furnace at 1°C min -1 The rate is raised to 700°C, and H 2 , kept for 2 h, and then gradually lowered to room temperature; finally black N-CNTs powder was obtained 2) Preparation of ONCNTs material

[0069] (a) Suspend 100.0 mg N-CNTs sample in 200.0 mL of 12 mol L -1 HCl solution, and stirred at room temperature for 6 h;

[0070] (b) After the obtained suspension w...

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Abstract

The invention belongs to the field of preparation of nano materials, and particularly relates to a nitric oxide doped carbon nanotube coating solid-phase microextraction fiber obtained based on a chemical bonding method, a preparation method thereof and an application of the nitric oxide doped carbon nanotube coating solid-phase microextraction fiber in detection of aromatic amine. The material isbased on a nitrogen oxide doped carbon material. The preparation method comprises the following steps: preparing an SPME fiber coating coated with an ONCNTs material and extracting aromatic amine; and then detecting the chromatographic column by using a GC-MS / MS (Gas Chromatography-Mass Spectrometry / Mass Spectrometry) method by using a gas chromatography-tandem triple quadrupole mass spectrometry method. The prepared ONCNTs material is good in thermal stability, rich in adsorption active sites, strong in electronegativity and large in specific surface area, the prepared ONCNTs coating fiberis good in reproducibility and long in service life, and the established method can be used for simultaneously determining various aromatic amines in a complex matrix.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and in particular relates to a nitrogen oxide-doped carbon nanotube-coated solid-phase microextraction fiber obtained based on a chemical bonding method, a preparation method thereof, and an application thereof for the detection of aromatic amines. Background technique [0002] Aromatic amines (AAs) are industrial intermediates widely used in pharmaceuticals, pesticides, azo dyes, and rubber. Due to the high solubility of aromatic amines in water, they are easy to cause environmental pollution through direct industrial discharge or indirect degradation of aromatic amine products. After these metabolically active aromatic amines enter the human body through the respiratory tract, intestinal tract and skin, they will produce the reactive intermediate hydroxylamine, destroy proteins and DNA, and cause harm to the human respiratory system, nervous system and cardiovascular system. Aromatic am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01J20/281B01J20/286G01N30/02G01N30/06G01N30/72
CPCB01J20/02B01J20/0259B01J20/20B01J20/22B01J20/281B01J20/286B01J2220/4806B01J2220/4812G01N30/02G01N30/06G01N30/7206G01N2030/062
Inventor 张兰李青青陈晖郭宇恒
Owner FUZHOU UNIV
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