Preparation method and application of cobaltosic oxide/graphene aerogel composite material

A technology of graphene airgel and cobalt tetroxide, which is applied in cobalt oxide/cobalt hydroxide, material analysis by observing the influence on chemical indicators, and analysis by making materials undergo chemical reactions can solve the problems of expensive instruments , to achieve the effect of simple operation, large localization area and low price

Active Publication Date: 2015-10-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the currently adopted NMR method for detecting acetylcholine (CN200710051916.X) has good reproducibility and no trauma, the instruments used are expensive

Method used

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  • Preparation method and application of cobaltosic oxide/graphene aerogel composite material
  • Preparation method and application of cobaltosic oxide/graphene aerogel composite material
  • Preparation method and application of cobaltosic oxide/graphene aerogel composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 50mg of solid graphene oxide and place it in 10mL double-distilled water, and ultrasonicate for 30min to make graphene oxide aqueous solution; weigh 5mg of Co(NO 3 ) 2 dissolved in the graphene oxide aqueous solution, and ultrasonically mixed. Transfer the mixed solution into a 15mL glass bottle, then transfer the 15mL glass bottle to a 20mL polytetrafluorohydrothermal kettle, keep the reaction at 160°C for 24h, and wait for the reaction kettle to drop to room temperature to obtain a cylindrical product; The cylindrical product is pre-frozen at -4°C; the pre-frozen material is placed in a freeze dryer, and freeze-dried at -80°C for 24 hours to obtain the graphene airgel-based composite material GAs / Co 3 o 4 .

[0031] The sample prepared in this embodiment is used for colorimetric detection of acetylcholine, and the experimental steps are as follows:

[0032] Step 1, H 2 o 2 The corresponding relationship between the concentration and the absorbance of the r...

Embodiment 2

[0036] Weigh 20mg of solid graphene oxide and place it in 20mL double-distilled water, and ultrasonicate for 30min to make graphene oxide aqueous solution; weigh 2mg of Co(NO 3 ) 2 dissolved in the graphene oxide aqueous solution, and ultrasonically mixed. Transfer the mixed solution into a 25mL polytetrafluorohydrothermal kettle, then transfer the polytetrafluorohydrothermal kettle to a 100mL polytetrafluorohydrothermal kettle, keep the reaction at 120°C for 12h, and wait for the reaction kettle to drop to room temperature. Obtain a cylindrical product; pre-freeze the cylindrical product at -2°C; put the pre-frozen material into a freeze dryer, and freeze-dry it at -40°C for 12 hours to obtain a graphene airgel Matrix composite material GAs / Co 3 o 4 .

[0037] The sample prepared in this example was used for colorimetric detection of acetylcholine, and the experimental steps were the same as in Example 1.

Embodiment 3

[0039] Weigh 50mg of solid graphene oxide and place it in 10mL double-distilled water, and ultrasonicate for 30min to make graphene oxide aqueous solution; weigh 100mg of CoCl 2 dissolved in the graphene oxide aqueous solution, and ultrasonically mixed. Transfer the mixed solution into a 15mL glass bottle, then transfer the 15mL glass bottle to a 25mL polytetrafluorohydrothermal kettle, keep the reaction at 160°C for 24h, and wait for the reaction kettle to drop to room temperature to obtain a cylindrical product; The cylindrical product is placed in absolute ethanol for solvent exchange 5 times, and the product after the solvent exchange is transferred to CO 2 Drying in supercritical drying equipment, CO 2 Supercritical drying equipment parameters are: CO 2 Flow 1.5m 3 / h, the temperature is 50°C, the pressure is 16MPa, and the time is 24h. After the drying is completed, the graphene airgel-based composite material GAs / Co 3 o 4 .

[0040] The sample prepared in this exa...

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Abstract

The invention provides a preparation method and application of a cobaltosic oxide/graphene aerogel composite material. The cobaltosic oxide/graphene aerogel composite material can be used in the field of colorimetric method based detection, especially used for colorimetric method based acetyl choline detection. A water solution prepared by oxidized graphene and soluble cobalt salt is transferred into a cylindrical container, then the cylindrical container is moved into a polytetrafluoroethylene hydrothermal kettle to perform constant-temperature thermal reaction, a drying technology is adopted to prepare the cobaltosic oxide/graphene aerogel composite material, and the preparation method is simple. The prepared cobaltosic oxide/graphene aerogel composite material has excellent conductivity, good electronic transmission performance and large localization range, and catalytic effect is remarkably improved. The prepared cobaltosic oxide/graphene aerogel composite material is creatively applied to colorimetric method based acetyl choline detection, operation is simple and convenient, the used instruments are low in price, and the research field of graphene aerogel based materials is widened.

Description

technical field [0001] The invention relates to a graphene material, specifically a preparation method and application of a cobalt trioxide / graphene airgel composite material. The material can be used in the field of colorimetric detection, especially for the colorimetric detection of acetylcholine. Background technique [0002] Graphene airgel is a self-assembled porous carbon material. Due to the composition of graphene in the material and the interconnection of graphene in space, it has ultra-high surface area and super-strong electrical conductivity, and these two characteristics are the key properties pursued by supercapacitor electrode materials, and because of the The material has the advantages of being porous, adjustable pore size, and stable surface chemical structure, and is considered to be one of the ideal electrode materials for supercapacitors. At present, the research on graphene airgel has become more and more enthusiastic. There are more and more composit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04C01B31/04G01N21/78G01N21/31
Inventor 毛罕平严玉婷王坤左志强
Owner JIANGSU UNIV
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