Method for preparing graphene through ball mill aided oxidation and reduction

A technology of graphene and graphene solution, which is applied in the field of ball milling-assisted redox preparation of graphene, can solve the problems of difficult operation, difficult control of graphene high-temperature process parameters, and easy agglomeration of graphene sheets, so as to improve efficiency and The effect of shortening the reflux reduction reaction time

Inactive Publication Date: 2015-05-27
宋鹏
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Problems solved by technology

There are some defects in these methods. The graphene prepared by the mechanical exfoliation method has low yield, small area, and difficult operation. Methods Large-scale production of graphene; the preparation of graphene by CVD method usually requires high temperature and the process parameters are not easy to control; the graphene sheets prepared by redox method are prone to agglomeration, and the reduction is not thorough enough
long reaction time

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0019] A method for preparing graphene by ball milling assisted redox, comprising the following steps:

[0020] Step 1: Preparation of graphite oxide:

[0021] (1) Add 115mL of concentrated sulfuric acid to a 500mL conical flask, put the conical flask into a low-temperature incubator, and control the temperature at about 0°C; add 5g of natural graphite powder treated with dilute hydrochloric acid, and then slowly add 2.5 g NaNO 3 , and 15g KMNO 4 , stirring and reacting for 2h;

[0022] (2) Move the Erlenmeyer flask into a constant temperature water bath at 35°C, and continue to stir for 2 hours; the solution is purple-green at this time; then slowly add 230 mL of deionized water, adjust the temperature of the constant temperature water bath to 75°C, and continue to stir for reaction About 30min;

[0023] (3) Finally, slowly add an appropriate amount of H 2 0 2 At this time, the solution turned golden yellow, filtered while it was hot, and repeatedly washed with 5% h...

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PUM

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Abstract

The invention elates to the technical field of inorganic chemical application, and specifically relates to a method for preparing graphene through ball mill aided oxidation and reduction. The method comprises the following steps: 1, preparing graphite oxide; and 2, preparing a graphene oxide solution through the graphite oxide obtained in step 1, and then refluxing to obtain graphene. With the adoption of the method, the time of subsequent refluxing reduction reaction is reduced, the efficiency of preparing graphene by the oxidation and reduction method is increased, and the reduction degree of graphene oxide is raised.

Description

technical field [0001] The invention relates to the technical field of inorganic chemistry application, in particular to a method for preparing graphene through ball milling-assisted redox. Background technique [0002] Graphene is made of sp 2 A new type of carbon material with a two-dimensional hexagonal honeycomb planar structure composed of hybrid carbon atoms, due to its special structure, unique electrical, optical, and thermal properties, has attracted widespread attention from scientists all over the world, and its application prospects are very broad. [0003] At present, with the development of science and technology. The preparation methods of graphene mainly include mechanical exfoliation method, redox method, chemical vapor deposition method, stripping carbon nanotube method, arc method, epitaxial growth method, thermal expansion method, etc. There are some defects in these methods. The graphene prepared by the mechanical exfoliation method has low yie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 宋鹏
Owner 宋鹏
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