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Preparation and application of functionalized multiwalled carbon nanotube chiral composite material

A technology of multi-walled carbon nanotubes and composite materials, which is applied to the preparation of functionalized multi-walled carbon nanotube chiral composite materials, the preparation of chiral recognition materials based on multi-walled carbon nanotubes, the enantiomer of tryptophan In the field of electrochemical chiral recognition of bulk materials, it can solve the application limitations of MWCNTs and other problems.

Inactive Publication Date: 2019-03-19
NORTHWEST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 functionalized multiwalled carbon nanotube chiral composite material
  • Preparation and application of functionalized multiwalled carbon nanotube chiral composite material
  • Preparation and application of functionalized multiwalled 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 preparation of a functionalized multiwalled carbon nanotube chiral composite material. Preparation of the functionalized multiwalled carbon nanotube chiral composite material comprises dissolving carboxylated ferrocene and aminated multiwalled carbon nanotubes into DMF (dimethyl formamide), under the action of crosslinking agent, and subjecting the carboxyl of the carboxylated ferrocene and the amino of the multiwalled carbon nanotubes through covalent crosslinking to form amido bonds and further to obtain a composite material of MWCNTs-Fc (multiwalled nanotubes-ferrocene); through cyclic voltammetry, scanning a bare electrode to obtain an electrode MWNTs-Fc / GCE (glassy-carbon electrode), dropwise coating beta-CD (beta-cyclodextrine) solution into the MWNTs-Fc / GCE to obtain a chiral identification material modified electrode beta-CD / MWNTs-Fc / GCE. The chiral identification material modified electrode beta-CD / MWNTs-Fc / GCE is placed into a tryptophan isomer solution and applied to identification through differential pulse volammetry; when interacting with a working electrode, L-tryptophan and D-tryptophan can present different peak currents, specifically, the D-tryptophan presents a higher peak current, and the L-tryptophan presents a lower peak current.

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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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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