Method for preparing graphene oxide by dispersed emulsion assisted with Hummers method

A dispersed and fossilized technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of large noise pollution, complex operating equipment, unsuitable for industrial application, etc., and achieve the effect of reducing the number of layers and simple process

Inactive Publication Date: 2012-10-03
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

However, the operation equipment of the ultrasonic treatment method is complicated, and the noise pollution is large, so it is not suitable for industrial application

Method used

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  • Method for preparing graphene oxide by dispersed emulsion assisted with Hummers method
  • Method for preparing graphene oxide by dispersed emulsion assisted with Hummers method
  • Method for preparing graphene oxide by dispersed emulsion assisted with Hummers method

Examples

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Embodiment

[0012] 1. Graphite oxide was prepared by the Hummers method:

[0013] Measure 60 mL of sulfuric acid with a concentration of 98% by mass and pour it into a beaker. Place the beaker in the freezer of the refrigerator and cool it to 0 °C. Weigh 2.5 g of graphite powder and 1.3 g of sodium nitrate and slowly add it to the beaker. Continue mechanical stirring. , slowly add 8g of potassium permanganate, keep the constant temperature at 4°C and continue to react for 1 hour; after the reaction is completed, heat up to 35°C; after 30 minutes, slowly add 150ml of ultrapure water, and continue to heat up to 98°C. At this time, the color of the solution changes from brown Turn into bright yellow; add 500 mL of ultrapure water and 40 mL of 30% H 2 o 2 , to remove unreacted potassium permanganate; then the product obtained was removed by centrifugation at 3000 rpm, and finally the product obtained was filtered, and the filter cake was washed with hydrochloric acid with a mass percentage ...

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Abstract

The invention discloses a method for preparing graphene oxide by dispersed emulsion assisted with a Hummers method. The method comprises the following steps of: firstly preparing graphene oxide precursor suspending liquid by adopting the Hummers method, repeatedly washing the graphene oxide precursor suspending liquid with ultrapure water and centrifuging at a low speed to obtain neutral graphene oxide precursor, finally dispersing the neutral graphene oxide precursor into the ultrapure water, and dispersing the neutral graphene oxide precursor by a laboratory dispersed emulsifying machine at a high speed so as to improve the interlamellar spacing of grapheme, thus finally obtaining monolayer graphene oxide by low-speed centrifugation. The process is simple, fast, safe and environment-friendly and is conducive to large-scale industrial production, and the number of layers of the graphene oxide can be effectively reduced. The prepared graphene oxide can be used as a drug carrier and mechanics enhancement phase of a composite material and can be used for preparing high drug carrying or high mechanical property miniature oxidation graphite-base composite materials. A reduction product of the grapheme can be widely used for preparing grapheme-base complex materials of energy storage materials, chemical / biologic sensors, conductive materials, and the like.

Description

technical field [0001] The invention relates to a method for preparing graphene oxide rapidly, simply and cheaply by dispersing and emulsifying assisted Hummers method. Background technique [0002] Graphene is a new material with a layered structure composed of carbon atoms, in which sp 2 The hybrid orbitals are connected to form a two-dimensional material with a hexagonal honeycomb lattice. Until 2004, graphene was thought to be impossible to exist on its own, until Andre Geim and Konstantin Novoselov at the University of Manchester, UK, made it a reality through experiments [1] (KS Novoselov, AK Geim, SV Morozov, et al. Electric field effect in atomically thin carbon films[J]. Science, 2004(306):666-669.). Because graphene has many excellent photoelectric, mechanical and chemical properties, since the advent of graphene, it has caused a research boom all over the world. At present, the preparation methods of graphene mainly include mechanical methods and chemical metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/198
Inventor 欧俊江玉民
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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