Preparation method of graphite oxide

A technology of graphite and compounds, which is applied in the field of preparation of graphite oxide from graphite, which achieves the effects of low equipment requirements, reduced risk, and improved peeling effect

Inactive Publication Date: 2014-02-12
TORAY ADVANCED MATERIALS RES LAB CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the Hummers method also has many disadvantages, such as: water needs to be added to the concentrated sulfuric ac

Method used

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  • Preparation method of graphite oxide
  • Preparation method of graphite oxide
  • Preparation method of graphite oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Using natural graphite as raw material, put container A in an ice bath, add 10 grams of 1500 mesh natural graphite, 200 ml of 98% concentrated sulfuric acid, 3.5 grams of sodium nitrate and 21 grams of potassium permanganate, and keep the temperature of the solution at about 10 °C , and stirred for 1 hour. The reactants were heated to 70°C and reacted for 2 hours. The resulting reaction solution was poured into Vessel B containing 5 liters of ice-water mixture. Add 50 milliliters of 30% hydrogen peroxide solution to obtain graphite oxide dispersion.

[0033] After 8 times of filtration and washing, a neutral graphite oxide dispersion can be obtained. Graphite oxide powder was obtained after drying.

[0034] Optical microscope photo see figure 1 and figure 2 .

Embodiment 2

[0036] Using natural graphite as raw material, put container A in an ice bath, add 10 grams of 50-mesh natural graphite, 220 ml of 98% concentrated sulfuric acid, 4.0 grams of sodium nitrate and 24 grams of potassium permanganate, and keep the solution temperature at 0 °C or so, stirring for 10 hours. The reactants were heated to 90°C and reacted for 5 hours. The resulting reaction solution was poured into container B containing 5 liters of 0°C water. Add 50 milliliters of 30% hydrogen peroxide solution to obtain graphite oxide dispersion.

[0037] After 8 times of filtration and washing, a neutral graphite oxide dispersion can be obtained. Graphite oxide powder was obtained after drying.

Embodiment 3

[0039] Using natural graphite as raw material, put container A in an ice bath, add 10 grams of 12000 mesh natural graphite, 153 ml of 98% concentrated sulfuric acid, 2.7 grams of sodium nitrate and 16 grams of potassium permanganate, and keep the solution temperature at 15 °C or so, stirring for 5 hours. The reactants were heated to 50°C and reacted for 0.5 hours. The resulting reaction solution was poured into container B containing 5 liters of 10°C water. Add 50 milliliters of 30% hydrogen peroxide solution to obtain graphite oxide dispersion.

[0040] After 8 times of filtration and washing, a neutral graphite oxide dispersion can be obtained. Graphite oxide powder was obtained after drying.

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Abstract

The invention provides a process method for preparing graphite oxide. The process method comprises the following steps: a. mixing graphite, a nitric acid compound, permanganate and concentrated sulfuric acid; b. heating to 50 to 90 DEG C, and reacting for 10 minutes and 10 hours; c. pouring the solution obtained in the step b into a vessel B containing water or an ice water mixture under 0 to 60 DEG C; d. adding hydrogen peroxide to the product obtained in the step c to obtain a graphite oxide dispersion liquid; and e. filtering, washing and drying the dispersion liquid obtained in the step d to obtain graphite oxide powder. By adopting the method, the risk in the preparation of graphite can be reduced; the requirements on production equipment can be reduced; and the stripping effect of graphite oxide can be remained. The graphite oxide prepared by the method can be used for preparing graphene as well as be applicable to the cell materials, composite materials, electronic devices, energy storage material and other fields.

Description

technical field [0001] The invention belongs to the field of nano-graphite conductive materials, and in particular relates to a method for preparing graphite oxide from graphite. Background technique [0002] Graphene is an emerging nanocarbon material in the same family as carbon nanotubes and fullerenes. After it was discovered in 2004 and existed stably, it immediately became a research hotspot in various fields. It has a two-dimensional structure of carbon arranged in a honeycomb shape, and is stabilized by the repulsive force generated by the electron clouds on both sides. Due to its excellent mechanical, electrical, thermal and optical properties, it has broad application prospects in multiple fields such as battery materials, composite materials, electronic devices, and energy storage materials. [0003] The preparation of graphene has always been the focus of attention. The preparation methods that have been reported so far mainly include mechanical exfoliation me...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/23
Inventor 吴祯琪孙培育刘刚桥吴刚
Owner TORAY ADVANCED MATERIALS RES LAB CHINA
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