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A device and method for preparing graphene paper based on glow plasma positive column region

A graphene paper and graphite technology, applied in the field of ionic and nanomaterial preparation, can solve the problems of increasing equipment complexity and preparation cost, and achieve the effect of avoiding complex devices and control equipment, high energy utilization efficiency, and low energy consumption preparation

Active Publication Date: 2015-07-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve a higher mean free path of electrons to obtain sufficient acceleration of electrons, the above-mentioned plasma reduction process usually needs to be carried out in a low-pressure or vacuum environment, which greatly increases the complexity of the equipment and the cost of preparation.

Method used

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  • A device and method for preparing graphene paper based on glow plasma positive column region
  • A device and method for preparing graphene paper based on glow plasma positive column region
  • A device and method for preparing graphene paper based on glow plasma positive column region

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Experimental program
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Effect test

preparation example Construction

[0041] Also comprise the preparation step of graphite oxide paper before this method:

[0042]Natural graphite and the concentrated sulfuric acid that mass concentration is 98% are uniformly mixed at room temperature, wherein the ratio of concentrated sulfuric acid and natural graphite is 25 milliliters: 1 gram, add potassium permanganate under ice-bath condition, wherein potassium permanganate The mass is 3.5 times that of natural graphite, stirred uniformly in a magnetic stirrer for 30 minutes, and the resulting mixture was heated to 35 o C and uniformly stirred in a magnetic stirrer for 2 hours, added deionized water and hydrogen peroxide, wherein the ratio of deionized water and natural graphite was 100 ml: 1 g, and the ratio of hydrogen peroxide and natural graphite was 8 ml: 1 g, and the resulting mixture The liquid is cleaned by a centrifuge, and finally passed through a vacuum drying oven at 35 o Dry under C conditions to obtain graphite oxide powder. Deionized wate...

Embodiment 1

[0045] 1. Natural graphite and the concentrated sulfuric acid that mass concentration is 98% are uniformly mixed at room temperature, wherein the ratio of concentrated sulfuric acid and natural graphite is 25 milliliters: 1 gram, add potassium permanganate under ice-bath condition, wherein permanganate The mass of potassium is 3.5 times that of natural graphite, uniformly stirred in a magnetic stirrer for 30 minutes, and the resulting mixture was heated to 35 o C and uniformly stirred in a magnetic stirrer for 2 hours, added deionized water and hydrogen peroxide, wherein the ratio of deionized water and natural graphite was 100 ml: 1 g, and the ratio of hydrogen peroxide and natural graphite was 8 ml: 1 g, and the resulting mixture The liquid is cleaned by a centrifuge, and finally passed through a vacuum drying oven at 35 o Dry under C conditions to obtain graphite oxide powder. Deionized water is added to the obtained graphite oxide powder, wherein the ratio of graphite ox...

Embodiment 2

[0050] Repeat Example 1, the only difference is that the distance between the graphene oxide paper and the conical electrode 4 cone points is initially set to be 7 cm, the helium gas flow rate is 2 liters / min, the voltage of the negative high voltage is 12 kV, and the average After moving the substrate stage 1, adjust the distance between the graphene oxide paper and the tip of the conical electrode 4 to be 12 cm, and discharge for 3.5 seconds. Through the above steps, graphene paper with a C / O atomic ratio of 5.4:1 can be obtained.

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Abstract

The invention discloses a device and a method for preparing graphene paper based on a glow plasma positive column area. The device comprises a substrate platform, a quartz sleeve, a quartz tube, a conical electrode, a high-voltage negative power supply and a helium source, wherein the substrate platform, the quartz sleeve and the conical electrode are arranged in the quartz tube; the substrate platform can move horizontally in the quartz tube; the substrate platform is embedded into the quartz sleeve; the conical tip of the conical electrode faces the substrate platform; the conical electrode is connected with the high-voltage negative power supply; the substrate platform is grounded; one end of the quartz tube is open; the other end of the quartz tube is connected with the helium source. In a preparation process, oxidized graphene paper is fixed onto the substrate platform, and glow discharge plasmas with positive column areas are formed between the oxidized graphene paper and the conical electrode by high voltage. By the method and the device, the graphene paper can be prepared quickly under normal pressure; the device and the process are simple, environment-friendly, high in energy utilization rate, and favorable for promoting the wide application of the graphene paper in fields, and have the potential of enlarging application in large scales.

Description

technical field [0001] The invention belongs to the technical field of plasma and nanometer material preparation, and in particular relates to a device and method for preparing graphene paper based on the positive column region of glow plasma. Background technique [0002] Graphene is a sp 2 Two-dimensional nanomaterials, in which hybridized carbon atoms are arranged in a hexagonal lattice, have attracted great interest and widespread attention for their peculiar properties since they were first discovered in 2004. Graphene paper is a bendable and flexible material composed of multiple sheets of graphene, which has good electrical conductivity, large specific surface area and excellent mechanical properties, and has broad application prospects in the field of energy storage. For example, graphene paper can serve as an energy storage material for foldable supercapacitors without the need for binders and conductive agents. [0003] At present, the preparation methods of grap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04C01B32/19
Inventor 薄拯岑可法严建华池涌李晓东祝伟光
Owner ZHEJIANG UNIV