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Preparation method of powder type graphene oxide

A graphene and powder technology, applied in the field of powdered graphene oxide preparation, can solve the problems of large space occupation, long time consumption, unfavorable environmental protection, etc., and achieve the effects of convenient storage, shortened experiment time, and convenient quantitative analysis

Inactive Publication Date: 2016-03-16
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Long-term ultrasonic pairing can break graphene oxide sheets, but it takes a long time, which greatly shortens the service life of the ultrasonic machine, and precipitation will occur after a certain period of storage, which takes up a lot of space and is not conducive to environmental protection

Method used

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  • Preparation method of powder type graphene oxide
  • Preparation method of powder type graphene oxide
  • Preparation method of powder type graphene oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Weigh 2g graphite powder and 1gNaNO 3 In the round bottom flask, add 46mL of concentrated sulfuric acid, and stir in ice bath for 5min;

[0019] (2) Then slowly add 6gKMnO 4 , the temperature does not exceed 20°C. The ice bath was removed, and the flask was placed at 35±3°C for 2h. At this point, the solution was dark green;

[0020] (3) Slowly add 92mL deionized water, raise the temperature to 98°C, keep it for 15min, then add 280mL warm water, stir for 5min, then add 30mLH 2 o 2 ;

[0021] (4) Add 1+9HCl80mL after cooling. After standing still for 12 hours, pour off the supernatant liquid, wash and centrifuge the lower layer solution to about pH=6,

[0022] (5) Freeze-dry at about -60°C for 24 hours, and grind it into powder to obtain graphene oxide (GO).

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Abstract

The invention provides a preparation method of powder type graphene oxide. The preparation method includes the specific steps that graphite powder and sodium nitrate are added to concentrated sulfuric acid for low-temperature oxidation, potassium permanganate is added for further oxidation and intercalation under the intermediate temperature condition, finally the mixture reacts at high temperature, centrifugal washing is conducted, and the mixture is ground into the powder type graphene oxide after freeze drying. The prepared graphene oxide has the advantages that operation is easy, and a product is easy to weigh and convenient to store.

Description

technical field [0001] The invention relates to the technical field of graphene oxide, in particular to a method for preparing powdered graphene oxide. technical background [0002] Graphene-based materials, as an emerging substance, have opened up a new research field in the scientific community. Graphene oxide, as the precursor of graphene, is a new type of two-dimensional carbon nanomaterial with many Oxygen-containing functional groups such as epoxy groups and hydroxyl groups, and carboxyl groups on the edge of the monolith, have excellent properties in the fields of mechanics, electricity, optics and chemistry, and are researched in the fields of chemistry, materials science and physics in recent years hotspot. [0003] Most of the graphene oxide prepared at present is in liquid state, and many of them are obtained by ultrasound. Long-term ultrasonic pairing can break graphene oxide sheets, but it takes a long time, which greatly shortens the service life of the ultra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 郭幸斐马树双王亮赵斌谭赟
Owner TIANJIN POLYTECHNIC UNIV
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