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Preparation and application of a functional multi-walled carbon nanotube chiral composite material

A technology of multi-walled carbon nanotubes and composite materials, applied in the preparation of functionalized multi-walled carbon nanotube chiral composite materials, electrochemical chiral recognition of tryptophan enantiomers, based on multi-walled carbon nanotubes In the field of preparation of chiral recognition materials, it can solve problems such as application limitations of MWCNTs

Inactive Publication Date: 2021-06-11
NORTHWEST NORMAL UNIVERSITY
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Problems solved by technology

However, the application of pristine MWCNTs is somewhat limited due to their agglomeration effect.

Method used

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  • Preparation and application of a functional multi-walled carbon nanotube chiral composite material
  • Preparation and application of a functional multi-walled carbon nanotube chiral composite material
  • Preparation and application of a functional multi-walled carbon nanotube chiral composite material

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Embodiment Construction

[0028] The preparation and application of the functionalized multi-walled carbon nanotube chiral composite material of the present invention will be further described below through specific examples.

[0029] 1. Preparation of chiral composite materials

[0030] (1) Aminated multi-walled carbon nanotubes (NH 2 -MWCNTs) preparation: add 1 g of carboxylated multi-walled carbon nanotubes to 20 mL of ethylenediamine to disperse uniformly by ultrasonic, add 1.2 g of DCC to reflux at 80°C for 48 hours, filter the product, wash with water and ethanol to remove the residue of ethylenediamine, and obtain NH 2 - MWCNTs, vacuum dried at 60 °C.

[0031] (2) Preparation of functionalized multi-walled carbon nanotube chiral composite material MWCNTs-Fc: take 50 mg NH 2 -MWCNTs, 25 mg Fc-COOH, dissolved in 50 mL of DMF, added 50 mg DCC, mixed evenly, stirred and reacted at 50°C for 24h; the reaction product was filtered, washed with DMF to remove excess Fc-COOH, at 60°C Dry in a vacuum ov...

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Abstract

The invention discloses a preparation of a functionalized multi-walled carbon nanotube chiral composite material, which comprises dissolving carboxylated ferrocene and aminated multi-walled carbon nanotubes in DMF, and under the action of a crosslinking agent, the ferrocene The carboxyl groups on the carbon nanotubes and the amino groups on the multi-walled carbon nanotubes are covalently cross-linked to form amide bonds, and the composite material MWCNTs‑Fc is obtained. Then use cyclic voltammetry to scan the bare electrode to obtain the electrode MWNTs-Fc / GCE, and then drop-coat the β-CD solution on the MWNTs-Fc / GCE to obtain the chiral recognition material modified electrode β-CD / MWNTs-Fc / GCE. The modified electrode β-CD / MWNTs-Fc / GCE was placed in the solution of tryptophan isomers, and differential pulse voltammetry was used to identify: when L-tryptophan and D-tryptophan interact with the working electrode , the peak current is different, the one with higher peak current value is D-tryptophan, and the one with lower peak current value is L-tryptophan.

Description

technical field [0001] The invention relates to the preparation of a chiral recognition material based on multi-walled carbon nanotubes, in particular to the preparation of a functionalized multi-walled carbon nanotube chiral composite material, which is mainly used for the electron recognition of tryptophan enantiomers. The chemical chiral recognition belongs to the technical field of composite material preparation and the field of electrochemical chiral recognition. Background technique [0002] Different amino acid isomers have different physiological activities and pharmacological characteristics, and the chiral recognition of amino acids is becoming increasingly important in the fields of biochemistry and science and technology. Currently, many methods have been used for chiral recognition, for example, high performance liquid chromatography, quartz crystal microbalance, fluorescence spectroscopy, capillary electrophoresis, colorimetry, and electrochemical methods. Due...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/327C01B32/174
CPCC01B32/174G01N27/3278
Inventor 莫尊理牛小慧杨星帅超赵盼刘振宇欧阳美璇郭瑞斌刘妮娟
Owner NORTHWEST NORMAL UNIVERSITY
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