Device and method for fast preparing large-area vertically aligned graphene

A vertically oriented, large-scale technology, applied in gaseous chemical plating, metal material coating process, coating, etc., can solve problems that hinder the preparation and application of high-quality nanomaterials, affect the growth rate and growth area of ​​graphene, and achieve The effect of reducing dosage and reducing production cost

Active Publication Date: 2012-07-11
ZHEJIANG UNIV
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  • Description
  • Claims
  • Application Information

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Benefits of technology

The patent text describes a method for growing vertically oriented graphene on conductive substrates. The graphene nanosheet obtained has a thickness of 1-10 nanometers and consists of 1-7 layers of graphene. The method allows for rapid growth of graphene in just a few minutes, reducing production costs. The use of a multi-cone electrode enables large-scale production of vertically oriented graphene. The method can be applied to various substrates without special requirements. The resulting graphene materials can be directly used in various processes without the need for additional catalysts or binders. Overall, this method promotes the wide application of high-quality graphene in various industries.

Problems solved by technology

This patents describes various ways to prepare highly pure layers of graphane with good electrical properties like electron conduction and heat transport capabilities. These techniques are important because they allow us to create more efficient electronic devices than current technologies based solely on planar structures.

Method used

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  • Device and method for fast preparing large-area vertically aligned graphene
  • Device and method for fast preparing large-area vertically aligned graphene
  • Device and method for fast preparing large-area vertically aligned graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1. The multi-cone electrode 2 is composed of an array comprising three conical electrodes. The adjacent conical electrodes are parallel and separated by ceramic insulators 6 with a spacing of 10 mm. The taper of a single conical electrode in the multi-cone electrode 2 is 1. :10. Each cone-shaped electrode in the multi-cone electrode 2 is powered by an independent high-voltage negative power supply 3 .

[0052] 2. Select a stainless steel sheet with a thickness of 0.025 mm as the substrate 5 . The base 5 faces the cone tips of the multi-cone electrodes 2 with a distance of 20 mm. Substrate 5 is grounded.

[0053] 3. The base 5 , the multi-cone electrode 2 and the ceramic insulator 6 are placed in the quartz tube 4 , and the quartz tube 4 is placed in the heating furnace 1 .

[0054] 4. The substrate 5 is connected to the electric translation stage 7 .

[0055] 5. Pass the mixed gas of hydrogen and argon into the quartz tube 4 (total flow rate: 2000 ml / min; volume rat...

Embodiment 2

[0061] Repeat Example 1, the only difference is: in step 1, the taper of a single conical electrode in the multi-cone electrode 2 is 1:20, and the distance between parallel conical electrodes is 5 mm; in step 2, choose not to The regular porous carbon film is used as the substrate, and the distance between the substrate and the tip of the multi-cone electrode is 10 mm; in step 5, it is heated to 800 by a heating furnace o C; in step 6, keep 800 o C heating, the relative humidity of the mixed gas is 55.2%, the distance between the base and the tip of the multi-cone electrode is kept constant at 10 mm, the discharge voltage is 3.5 kV, the translation speed is 1 mm / s, and the discharge duration is 30 seconds; 7, keep the furnace temperature at 800 o c.

[0062] Through the above steps, a layer of vertically oriented graphene nanosheets can be evenly covered on the surface of the irregular porous carbon film. image 3 Shown is a scanning electron micrograph of a vertically orie...

Embodiment 3

[0064] Repeat Example 1 with the only difference that: in step 1, the taper of a single tapered electrode in multi-tapered electrode 2 is 1:3, and the distance between parallel tapered electrodes is 10 mm; in step 2, the thickness The gold foil of 0.025 mm is used as the substrate, and the distance between the substrate and the tip of the multi-cone electrode is 20 mm; in step 5, it is heated to 600 by a heating furnace o C; in step 6, keep 600 o C heating, the relative humidity of the mixed gas is 31.4%, the distance between the base and the tip of the multi-cone electrode is kept constant at 20 mm, the translation speed is 0.01 mm / s, the discharge voltage is 6 kV, and the discharge duration is 1 hour; 7, keep the furnace temperature at 600 o c.

[0065] Through the above steps, a layer of vertically oriented graphene nanosheets can be covered on the gold foil.

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Abstract

The invention discloses a device and method for fast preparing large-area vertically aligned graphene. The device comprises a heating furnace, a multicone electrode, a high-voltage negative power source, a quartz tube, a substrate, a ceramic insulator and an electric translation platform, wherein the multicone electrode, the substrate and the ceramic insulator are arranged in the quartz tube, the quartz tube is placed in the heating furnace; the substrate faces to the cone tip of the multicone electrode; the substrate is connected with the electric translation platform; and the substrate is earthed and the multicone electrode is connected with the high-voltage negative power source. The preparation process comprises the following four steps: heating the substrate; performing translation on the substrate and discharging with the gas among the multicone electrode; reducing the substrate; and cooling the substrate. By adopting the device and the method, the one-step atmospheric fast large-area growth of vertically aligned graphene can be realized on the surface of the substrate and no catalyst or adhesive is required. The obtained graphene nanoplate is nearly perpendicular to the surface of the substrate and is especially suitable for being used in field emission, nanoscale plasmas, supercapacitors, secondary batteries and the like.

Description

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Claims

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Application Information

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Owner ZHEJIANG UNIV
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