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Preparation method and application of chitosan oligosaccharide-three-dimensional graphene electrode

A graphene electrode, chitosan oligosaccharide technology, applied in the direction of material electrochemical variables, etc., can solve the problem of lack of chitosan oligosaccharide three-dimensional graphene, and achieve the effect of increasing interaction and improving stability

Inactive Publication Date: 2017-11-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a preparation method and application of chitooligosaccharide-three-dimensional graphene electrode in order to solve the problem of lacking a kind of chitooligosaccharide-modified three-dimensional graphene electrode

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  • Preparation method and application of chitosan oligosaccharide-three-dimensional graphene electrode
  • Preparation method and application of chitosan oligosaccharide-three-dimensional graphene electrode
  • Preparation method and application of chitosan oligosaccharide-three-dimensional graphene electrode

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specific Embodiment approach 1

[0031] Specific embodiment one: the preparation method of a kind of chitosan oligosaccharide-three-dimensional graphene electrode of the present embodiment is carried out according to the following steps:

[0032] 1. Preparation of chitosan oligosaccharide-three-dimensional graphene hydrogel: add chitosan oligosaccharide to graphene oxide aqueous solution, mix well, and keep warm in a reaction kettle at a temperature of 120-180°C for 6h-24h to obtain a shell Oligosaccharide-3D graphene hydrogel;

[0033] The ratio of the quality of the chitooligosaccharide to the volume of the graphene oxide aqueous solution is 0.005g to 0.015g: 10mL;

[0034] The concentration of graphene oxide in the graphene oxide aqueous solution is 2mg / mL~5mg / mL;

[0035] 2. Preparation of chitosan oligosaccharide-three-dimensional graphene airgel: After taking out the chitosan oligosaccharide-three-dimensional graphene hydrogel obtained in step 1, place it in a temperature of -80°C and freeze it for 6h ...

specific Embodiment approach 2

[0038] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the ratio of the mass of chitosan oligosaccharide described in step one to the volume of graphene oxide aqueous solution is 0.010g:10mL. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0039] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the concentration of graphene oxide in the graphene oxide aqueous solution in step 1 is 3 mg / mL˜4 mg / mL. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method and the application of a chitosan oligosaccharide-three-dimensional graphene electrode, relates to a preparation method and the application of the chitosan oligosaccharide-three-dimensional graphene electrode, and aims to solve the problem that no chitosan oligosaccharide modifies three-dimensional graphene at the present. The method comprises the following steps: I, preparation of chitosan oligosaccharide-three-dimensional graphene hydrogel; II, preparation of chitosan oligosaccharide-three-dimensional graphene aerogel; III, preparation of the chitosan oligosaccharide-three-dimensional graphene electrode. The application is that the chitosan oligosaccharide-three-dimensional graphene electrode is used for measuring the content of imidacloprid. According to the preparation method, cationic alkaline amino chitosan oligosaccharide, which is the only one having positive charges in the natural world, is used as a graphene sheet binder to enhance the interaction between every two adjacent graphene sheet layers, so that the graphene sheet layers are stacked more regularly. Therefore, chitosan oligosaccharide-modified three-dimensional graphene holes prepared through a hydrothermal self-assembling method are more uniform and continuous, and the electrochemical detection stability is improved; the chitosan oligosaccharide-three-dimensional graphene electrode is used for detecting the content of the imidacloprid.

Description

technical field [0001] The invention relates to a preparation method and application of a chitosan oligosaccharide-three-dimensional graphene electrode. Background technique [0002] The current electrode field mainly focuses on the research of modified glassy carbon electrodes. However, only modifying a thin layer of film on the surface of glassy carbon electrodes cannot effectively utilize the three-dimensional structure of the electrode, and the recognition sites are limited, resulting in a narrow linear range. As a porous material with a skeleton composed of graphene sheets, three-dimensional graphene organically combines the excellent electrical and chemical properties of graphene with the large specific surface area and adsorption performance of porous materials, and proposes new ideas for electrode working electrodes . Therefore, using three-dimensional graphene as a working electrode will effectively utilize the three-dimensional structure of the electrode, increase...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/30G01N27/48
Inventor 杨鑫张敏王静
Owner HARBIN INST OF TECH
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