A kind of preparation method of graphene and manganese dioxide nanocomposite material

A nanocomposite material and manganese dioxide technology are applied in the field of preparation of graphene and manganese dioxide nanocomposite materials, which can solve the problems of different morphology, agglomeration phenomenon, inability to exert special properties and advantages, etc., and achieve a simple and convenient preparation method. The effect of easy operation, enlarged reaction area and good application prospect

Inactive Publication Date: 2011-12-14
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the products obtained by most methods are powders or particles with different shapes, wide particle size distribution, and serious agglomeration phenomenon.
Nano-manganese dioxide will have serious agglomeration during storage and use, making it unable to exert its special properties and advantages in a monodisperse state
When used as an electrode material, there are also disadvantages such as poor electronic conductivity and low utilization rate when using manganese dioxide alone, so nano-manganese dioxide is often combined with carbon-based materials with a large specific surface area, which can Further improve its activity and stability, and exert the synergistic effect of both (CN 200410041356.6; CN 200610068772.4; CN 200710156155.4; CN 200910071880.0; CN200910071963.X)
So far, there have been no literature reports on the loading of leaf-shaped or rod-shaped manganese dioxide nanocrystals on graphene

Method used

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  • A kind of preparation method of graphene and manganese dioxide nanocomposite material
  • A kind of preparation method of graphene and manganese dioxide nanocomposite material
  • A kind of preparation method of graphene and manganese dioxide nanocomposite material

Examples

Experimental program
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Effect test

Embodiment 1

[0028] First mix 1g graphite, 0.75g sodium nitrate and 23ml 98wt.% sulfuric acid in an ice-water bath and mix well, gradually add 3g potassium permanganate within 0.5h; then react in a 35℃ water bath for 40min; then at room temperature Add 46ml of deionized water and stir for 15min, and finally add 140ml of deionized water and 10ml of hydrogen peroxide; the resultant product is repeatedly filtered and washed until it is neutral to obtain graphite oxide. Disperse 0.1 g of graphite oxide into 50 ml of water, add 0.1 ml of hydrazine hydrate, and reflux in a 95° C. water bath for 1 hour. The resulting product is repeatedly filtered and washed until it is neutral to obtain graphene. Then add 0.1g graphene to 50ml deionized water; after ultrasonic dispersion for 1h, add 2.724g potassium permanganate saturated solution, drop 3.1g hydrochloric acid, and ultrasonically assist the reaction at 70℃ for 3h; the resulting product is repeatedly filtered Washing until it is neutral, and vacuum...

Embodiment 2

[0030] First mix 1g graphite, 0.75g sodium nitrate and 23ml 98wt.% sulfuric acid in an ice water bath and mix well, gradually add 3g potassium permanganate within 0.5h; then react in a water bath at 35℃ for 20min; then at room temperature Add 46ml of deionized water and stir for 15min, and finally add 140ml of deionized water and 10ml of hydrogen peroxide; the resultant product is repeatedly filtered and washed until it is neutral to obtain graphite oxide. 0.1 g of graphite oxide was dispersed into 50 ml of water, 0.2 ml of hydrazine hydrate was added, and refluxed in a water bath at 95° C. for 1 h. The resulting product was repeatedly filtered and washed until it became neutral to obtain graphene. Then add 0.1g of graphene to 50ml of deionized water; after ultrasonic dispersion for 2h, add 1.816g of potassium permanganate saturated solution, add dropwise 2.06g of hydrochloric acid, and ultrasonically assist the reaction at 70°C for 2h; the resulting product is repeatedly filter...

Embodiment 3

[0032] First mix 1g graphite, 0.75g sodium nitrate and 23ml 98wt.% sulfuric acid in an ice-water bath and mix well, gradually add 3g potassium permanganate within 0.5h; then react in a 35℃ water bath for 40min; then at room temperature Add 46ml of deionized water and stir for 15min, and finally add 140ml of deionized water and 10ml of hydrogen peroxide; the resultant product is repeatedly filtered and washed until it is neutral to obtain graphite oxide. 0.1 g of graphite oxide was dispersed into 50 ml of water, 0.3 ml of hydrazine hydrate was added, and refluxed in a 95° C. water bath for 1 h. The resulting product was repeatedly filtered and washed until it became neutral to obtain graphene. Then add 0.1g graphene to 50ml deionized water; after ultrasonic dispersion for 3h, add 1.008g potassium permanganate saturated solution, drop 1g hydrochloric acid, and ultrasonically assist the reaction at 70℃ for 4h; the resulting product is repeatedly filtered and washed Until it is neu...

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Abstract

The invention relates to a preparation method of a graphene and manganese dioxide nanocomposite material, comprising: (1) stirring and mixing graphite, potassium nitrate and concentrated sulfur evenly, adding potassium permanganate, and reacting at 30-40° C. for 20-40 minutes , add deionized water at room temperature, add hydrogen peroxide after reacting for 15 to 30 minutes to obtain graphite oxide; (2) disperse the above graphite oxide in water, add hydrazine hydrate, and react at 95°C for 1 to 24 hours to obtain graphene (3) ultrasonically disperse the graphene in a saturated potassium permanganate solution, add acid, and react at 60-80° C. for 1-5 hours to obtain graphene and manganese dioxide nanocomposite material. The invention has the advantages of simple reaction, easy control, convenient operation and simple process; the obtained composite material has broad application prospects and can be used for catalysts, biosensing materials, electrode materials of lithium ion batteries and supercapacitor electrode materials, and the like.

Description

Technical field [0001] The invention belongs to the field of preparation of manganese dioxide nano composite materials, and particularly relates to a preparation method of graphene and manganese dioxide nano composite materials. Background technique [0002] Due to the diversity of its structure and its unique physical and chemical properties, as well as its low price and environmental friendliness, manganese dioxide material is an important electrode material, widely used in dry batteries, alkaline manganese batteries, zinc manganese batteries, magnesium manganese batteries, In chemical power sources such as lithium manganese batteries (CN 1758468A; CN 1594212; CN 95103067.1; CN 200510014876.2; CN200810027780.3; CN 200810027780.3), as a multifunctional fine inorganic functional material, it can be used as molecular sieves, advanced catalyst materials, etc. As an amphoteric transition metal oxide, it has a wide range of applications in industrial production and environmental trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01G45/02B82Y30/00B82Y40/00
Inventor 秦宗益郭娜王凌凤蔡雅萌
Owner DONGHUA UNIV
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