Method for graphene oxide synthesis

A graphite and oxidant technology, applied in chemical instruments and methods, carbon compounds, pressure vessels used in chemical processes, etc., can solve the problem of heat removal that has not been disclosed, and achieve reduced consumption of sulfuric acid, high oxidation degree, and high content Effect

Active Publication Date: 2020-01-31
矿物股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This document does not disclose how to remove the heat from the oxidation reaction zone and how to introduce the explosive mixture of reagents into the pressure vessel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: A method of synthesizing graphene oxide, wherein a mixture of sulfuric acid and dry ice is used, the amount of dry ice being sufficient to solidify the mixture, and a mixture of graphite with an oxidizing agent and dry ice as a reagent.

[0020] 75ml of concentrated sulfuric acid was mixed with 90g of dry ice with a particle size of 1mm to 5mm; the solidified mixture was introduced into a 500ml autoclave made of stainless steel 316L. Then 12g of ground natural graphite (particle size D 50 = 15μm and D 95 =70 μm), 72 g of potassium permanganate and 150 g of dry ice with a particle size of 1 mm to 5 mm were introduced into the autoclave. Finally, 75ml of concentrated sulfuric acid was mixed with 90g of dry ice with a particle size of 1mm to 5mm, and the solidified mixture was introduced into the autoclave. Close and seal the autoclave. The autoclave was mounted on a shaker and rotated at 12 rpm for 3 hours. As the rotation begins, hot air is blown onto the ...

Embodiment 2

[0025] Example 2: A method of synthesizing graphene oxide, wherein a mixture of sulfuric acid and graphite and dry ice is used, the amount of dry ice is sufficient to solidify the mixture, and a mixture of oxidizing agent and dry ice is used as a reagent.

[0026] Mix 75ml of concentrated sulfuric acid with 6g of ground natural graphite (particle size D 50 = 15μm and D 95 = 70 μm); the obtained mixture was mixed with 90 g of dry ice having a particle size of 1 mm to 5 mm; the solidified mixture was introduced into a 500 ml autoclave made of stainless steel 316L. Then, a mixture of 72 g of potassium permanganate and 150 g of dry ice having a particle diameter of 1 mm to 5 mm was introduced into the autoclave. Finally, mix 75ml of concentrated sulfuric acid with 6g of ground natural graphite (particle size D 50 = 15μm and D 95 = 70 μm); the obtained mixture was mixed with 90 g of dry ice having a particle size of 1 mm to 5 mm, and the solidified mixture was introduced into an...

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Abstract

The invention relates to the field of carbon structure production and, in particular, to a method for synthesis of graphene oxide which is widely used in electronics, medicine, pharmacology and construction industries. Provided is a method for synthesis of graphene oxide that includes oxidizing ground graphite with sulfuric acid and at least one oxidizer in a medium of supercritical fluid, whereinthe method includes providing a mixture of sulfuric acid and dry ice in an amount sufficient for the mixture to solidify, and a mixture of at least one oxidizer and dry ice, wherein at least one of said mixtures contains ground graphite; introducing the provided mixtures into a high pressure autoclave; and further mixing the reagents. Thus, the claimed invention is a method for synthesis of graphene oxide that allows achieving the technical result consisting in safe production of high quality graphene oxide, wherein the time cost is relatively low and the consumption of sulfuric acid is significantly reduced.

Description

technical field [0001] The invention relates to the field of carbon structure production, in particular to a synthesis method of graphene oxide, which is widely used in electronics, medicine, pharmacology and construction industries. Background technique [0002] Graphene oxide is sp 2 Hybridized carbon atoms that form a single layer or a structure with several layers. Graphene oxide has a high specific activity surface formed by multiple layers of carbon atoms with a wide range of oxygen-containing functional groups. By using graphene oxide, various nanostructures such as flexible nanomembranes, nanocomposites, etc. can be obtained. Graphene oxide is used as an efficient sorbent for heavy metal ions and as a matrix for bone tissue regeneration, as well as in drug delivery agents, catalysis, and wound treatment. Furthermore, reduced graphene oxide is obtained from graphene oxide and can be used to replace expensive graphene. [0003] The Hummers method including its modi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198
CPCC01B32/198B82Y40/00Y02P20/54B01J3/008B82Y30/00B01J3/04
Inventor 米哈伊尔·亚历山德罗维奇·阿尔希波夫穆哈默德·马格蒙德维奇·阿尔萨努卡耶夫亚历山大·伊万诺维奇·莫特恰内谢尔盖·斯特帕诺维奇·科瓦廖夫弗拉基米尔·费德诺维奇·希特斯利
Owner 矿物股份有限公司
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