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Preparation method of porous graphene oxide

A graphene and porous technology, which is applied in the field of preparation of porous graphene oxide, can solve the problems of low storage density, high impedance, and difficulty in large-scale application, and achieves good reproducibility, mild reaction, size and thickness uniform effect

Inactive Publication Date: 2013-03-13
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Supercapacitors mainly absorb charge and store energy through the conductive material on the surface, but its storage density is low and its impedance is large, so it is difficult to apply on a large scale

Method used

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  • Preparation method of porous graphene oxide
  • Preparation method of porous graphene oxide
  • Preparation method of porous graphene oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: graphite oxide suspension 0.5mg / ml, stripping voltage is 40V, stripping frequency is 40Hz, stripping time is 120min

[0033] Using 30um natural flake graphite as raw material, graphite oxide was prepared by Hummers method; the obtained graphite oxide was dissolved in deionized water. At room temperature, use a magnetic stirrer to disperse for 30 minutes, prepare a 0.5 mg / ml GO suspension, and then transfer it to a cuboid electrolytic cell, and place graphite electrodes on both sides of the electrolytic cell; one end of the AV signal line is connected to the signal generator Connect the output port of the power amplifier to the output port of the power amplifier, and connect the other end to the input port of the power amplifier; connect the test probes of the oscilloscope to the positive and negative connectors of the output signal line of the power amplifier; the positive and negative connectors are respectively connected to the graphite electrodes. Turn ...

Embodiment 2

[0035] Embodiment 2: graphite oxide suspension 0.5mg / ml, stripping voltage is 60V, stripping frequency is 40Hz, stripping time is 120min

[0036]Using 30um natural flake graphite as raw material, graphite oxide was prepared by Hummers method; the obtained graphite oxide was dissolved in deionized water. At room temperature, use a magnetic stirrer to disperse for 30 minutes, prepare a 0.5 mg / ml GO suspension, and then transfer it to a cuboid electrolytic cell, and place graphite electrodes on both sides of the electrolytic cell; one end of the AV signal line is connected to the signal generator Connect the output port of the power amplifier to the output port of the power amplifier, and connect the other end to the input port of the power amplifier; connect the test probes of the oscilloscope to the positive and negative connectors of the output signal line of the power amplifier; the positive and negative connectors are respectively connected to the graphite electrodes. Turn o...

Embodiment 3

[0038] Example 3: graphite oxide suspension 0.5 mg / ml, stripping voltage 80V, stripping frequency 40Hz, stripping time 120min

[0039] Using 30um natural flake graphite as raw material, graphite oxide was prepared by Hummers method; the obtained graphite oxide was dissolved in deionized water. At room temperature, use a magnetic stirrer to disperse for 30 minutes, prepare a 0.5 mg / ml GO suspension, and then transfer it to a cuboid electrolytic cell, and place graphite electrodes on both sides of the electrolytic cell; one end of the AV signal line is connected to the signal generator Connect the output port of the power amplifier to the output port of the power amplifier, and connect the other end to the input port of the power amplifier; connect the test probes of the oscilloscope to the positive and negative connectors of the output signal line of the power amplifier; the positive and negative connectors are respectively connected to the graphite electrodes. Turn on the powe...

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Abstract

The invention belongs to the technical field of graphene materials, and in particular relates to a preparation method of a porous graphene oxide. By using the principles of colloid chemistry and electrokinetics, graphite oxide is stripped in an alternating electric field. Particularly, electric field actions are applied to two sides of a graphite sol solution, and electronegative graphite oxide particles start moving towards an anode; when the electric field action directions are opposite in direction, the graphite oxide particles start moving in an opposite direction, and so on, finally the graphite oxide is stripped to single-layer graphene oxide; and electric fields continuously act, the part of the surface of the single-layer graphene oxide, which is with charges, is separated from the surface of the graphene oxide, and a hole structure is remained, so that the high-quality porous graphene oxide is obtained. The preparation method has the advantages of simpleness in operation, low cost, safety without pollution, high efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of graphene materials, in particular to a method for preparing porous graphene oxide. Background technique [0002] Graphene, also known as single-layer graphite, is a single-layer two-dimensional planar structure in which carbon atoms are closely arranged in a regular hexagon to form a honeycomb lattice. The thickness of this crystal film is only 0.335nm. The stable crystalline structure of graphene endows carbon atoms with high thermal conductivity, elastic modulus, and electron mobility. At the same time, the layered structure of graphene enables the specific surface area of ​​the crystal film to reach 2630m 2 / g, when the surface of graphene distributes more pores, the specific surface area is larger. The high specific surface area of ​​porous graphene makes it promising for hydrogen storage, supercapacitors and seawater desalination. [0003] In the field of clean energy, since graphene is flaky and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y40/00C01B32/192
Inventor 张东谢金花
Owner TONGJI UNIV
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