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Preparation method of electrode based on gold nanoparticle doped covalent organic framework composite material

A covalent organic framework and gold nanoparticle technology is applied in the direction of material electrochemical variables, material analysis, and material analysis through electromagnetic means. It can solve the problems of long time-consuming, expensive equipment, and complicated operation, and achieves simple production. Improve catalytic effect and good selectivity

Active Publication Date: 2018-08-03
YANGZHOU UNIV
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Problems solved by technology

[0003] At present, the methods used to detect chlorogenic acid include: thin-layer chromatography, high performance liquid chromatography, gas chromatography-mass spectrometry and capillary electrophoresis. Although these detection methods have the advantages of high sensitivity, good selectivity, and low detection limit, they are difficult to operate. The shortcomings of complexity, expensive equipment, and long time-consuming limit their application

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  • Preparation method of electrode based on gold nanoparticle doped covalent organic framework composite material
  • Preparation method of electrode based on gold nanoparticle doped covalent organic framework composite material
  • Preparation method of electrode based on gold nanoparticle doped covalent organic framework composite material

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Embodiment Construction

[0026] 1. Preparation method of modified glassy carbon electrode based on covalent organic framework material:

[0027] 1. Preparation of TAPB-DMTP-COF:

[0028] At room temperature, weigh 10.5 mg 1,3,5-tris(4-aminophenylbenzene) and 8.5 mg 2,5-dimethoxyterephthalaldehyde monomer into 4.5 mL 1,4-dioxane , n-butanol, and methanol (4:4:1 v / v / v), ultrasonically for half an hour to dissolve the monomer, then slowly add 0.05 mL of acetic acid dropwise, react at room temperature for 2 hours, continue to add 0.45 mL of acetic acid dropwise, and put React in an oven at 70°C for 24h. The obtained precipitate was washed with tetrahydrofuran and acetone, and finally vacuum-dried for 24 h to obtain a yellow solid, namely 15 mg TAPB-DMTP-COF.

[0029] 2. Preparation of Au@TAPB-DMTP-COF:

[0030] At room temperature, weigh 30 mg of TAPB-DMTP-COF into a small glass bottle, add 15 mL of methanol, ultrasonically disperse evenly, slowly add 160 μL of chloroauric acid with a mass percentage o...

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Abstract

The invention discloses a preparation method of an electrode based on a gold nanoparticle doped covalent organic framework composite material and relates to the technical field of electrochemical sensors. The preparation method comprises the following steps: firstly, dissolving 1,3,5-tri(4-aminophenyl benzene) and 2,5-dimethoxy p-phthalaldehyde into a solvent, reacting under the catalysis of acetic acid and obtaining TAPB-DMTP-COF; secondly, dispersing the TAPB-DMTP-COF into methanol, and then adding chloroauric acid and a sodium borohydride methanol solution in sequence for reacting to obtainAu@ TAPB-DMTP-COF; dispersing the Au@TAPB-DMTP-COF in water to obtain suspension, and then modifying the suspension on the surface of a glassy carbon electrode, thus obtaining the modified glassy carbon electrode based on a covalent organic framework material. The invention constructs an electrochemical sensor for detecting chlorogenic acid; current response of chlorogenic acid is improved by modifying the glassy carbon electrode with the Au@TAPB-DMTP-COF.

Description

technical field [0001] The invention relates to the field of electrochemical sensors, in particular to a method for preparing a gold nanoparticle doped covalent organic framework modified glassy carbon electrode, and using the modified electrode to detect chlorogenic acid. Background technique [0002] Chlorogenic acid is a phenylpropanoid compound produced by plants through the shikimate pathway during aerobic respiration. Studies have shown that chlorogenic acid has pharmacological activity, antibacterial, anti-oxidation, anti-aging, anti-cancer and excitatory central nervous system. These unique properties make chlorogenic acid widely used in medicine, so a quick and easy method is proposed. The method for the determination of chlorogenic acid is particularly important. [0003] At present, the methods used to detect chlorogenic acid include: thin-layer chromatography, high performance liquid chromatography, gas chromatography-mass spectrometry and capillary electrophore...

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Application Information

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IPC IPC(8): G01N27/30
CPCG01N27/308
Inventor 王洋张婷
Owner YANGZHOU UNIV
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