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Preparation method of porous graphene

A technology of porous graphene and graphene, applied in the direction of electrolysis process, electrolysis components, etc., can solve the problems of difficult and precise control of conditions and complicated operation.

Active Publication Date: 2015-09-30
HUNAN AGRICULTURAL UNIV
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Problems solved by technology

[0005] At present, the methods for preparing porous graphene mainly include: solution self-assembly method, interfacial self-assembly method, template-mediated synthesis method, etc., but these methods are more complicated to operate and difficult to precisely control the conditions

Method used

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preparation example Construction

[0023] refer to figure 1 , a kind of preparation method of porous graphene of the present invention comprises:

[0024] Step S100: dispersing graphene oxide and graphene in a phosphate buffer solution to obtain a mixed solution of graphene and graphene oxide.

[0025] In one of the embodiments, step S100 is specifically: dispersing graphene and graphene oxide in phosphate buffer solution, the concentration of graphene in phosphate buffer solution is 1mg / mL, graphene oxide and graphene in phosphate buffer solution The concentration ratio in the mixture is 1:50-5:1 to obtain a mixed solution of graphene and graphene oxide.

[0026] In one embodiment, the pH value of the phosphate buffer solution is 4-6.

[0027] In one embodiment, the graphene oxide is prepared by the Hummers method, which is a classic method for preparing graphene oxide, and the quality of the prepared graphene oxide is reliable. Graphene is obtained by reducing graphene oxide prepared by the Hummers method ...

Embodiment 1

[0039] Graphene and graphene oxide are dispersed in a phosphate buffer solution with a pH value of 4, the concentration of graphene in a 0.1mol / L phosphate buffer solution is 1 mg / mL, and the concentration of graphene oxide in a phosphate buffer solution is 1 mg / mL. mL, to obtain a mixture of graphene and graphene oxide.

[0040] The glassy carbon electrode is used as the working electrode, the mixture of graphene and graphene oxide is dispersed and dropped on the glassy carbon electrode, and dried, then the modified glassy carbon electrode is used as the working electrode, the counter electrode is a platinum sheet electrode, and the reference electrode is a A saturated calomel electrode was placed in a 0.1mol / L blank phosphate buffer solution with a pH value of 4 for cyclic voltammetry scanning with a scanning potential of 0 V to -2.0 V and a scanning speed of 50 mV / s to obtain porous graphene-modified Working electrode, that is, porous graphene is obtained on the working ele...

Embodiment 2

[0042] The difference between Example 2 and Example 1 is that the concentration of graphene is 0.1 mg / mL, the pH value of the phosphate buffer solution is 5, the graphite electrode is used as the working electrode, the counter electrode is a platinum sheet electrode, and the reference electrode is saturated The calomel electrode was placed in a 0.1mol / L blank phosphate buffer solution with a pH value of 5 for cyclic voltammetry scanning, the scanning potential was from 0 V to -2.0 V, and the scanning speed was 50 mV / s, and the work of porous graphene modification was obtained. Electrode, that is, porous graphene is obtained on the working electrode.

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Abstract

The invention relates to a preparation method of porous graphene. The method includes the steps of dispersing graphene and graphene oxide in a phosphate buffer to obtain a mixture of graphene and graphene oxide, and conducting cyclic voltammetry scan on the mixture of graphene and graphene oxide through a three-electrode system so that a working electrode for decorating the porous graphene can be obtained, that is, the porous graphene can be obtained on the working electrode. The method is easy to operate, few in steps, rapid and low in cost.

Description

technical field [0001] The invention relates to a method for preparing graphene, in particular to a method for preparing porous graphene. Background technique [0002] Graphene is a two-dimensional carbon material, which is a general term for single-layer graphene, double-layer graphene and few-layer graphene. Due to its excellent electronic, mechanical and thermal stability properties, it is widely used in batteries, supercapacitors, electronic devices, sensors The application of composite materials and other aspects has been widely concerned. [0003] Graphene oxide (graphene oxide) is the oxide of graphene, and the oxygen-containing functional groups on graphene oxide increase to make its properties more active than graphene. [0004] Porous graphene is a three-dimensional structure of graphene. Because it has a larger specific surface area than graphene, it is beneficial to loading capacity and catalysis; its porous structure helps to improve mass transfer. Research ho...

Claims

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Application Information

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IPC IPC(8): C25B1/00C01B31/04
Inventor 苏招红姜令芸周文新李朝荣周铁安
Owner HUNAN AGRICULTURAL UNIV
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