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 and other directions, can solve problems such as hindering the preparation and application of high-quality nanomaterials, affecting the growth rate and growth area of ​​graphene, etc. The effect of reducing the amount of consumption and reducing the production cost

Active Publication Date: 2013-10-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low pressure or vacuum required by the above-mentioned plasma vapor enhanced chemical vapor deposition process seriously affects the growth rate and growth area of ​​graphene, hindering the large-scale preparation and application of this high-quality nanomaterial.

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

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a device and a method for rapidly preparing large-scale vertically oriented graphene. Background technique [0002] Graphene is made of carbon atoms according to sp 2 The hexagonal type composed of hybrid orbitals is a two-dimensional crystal structure of honeycomb lattice, and the thickness is only the diameter of a single layer of carbon atoms. Due to its unique two-dimensional structure and excellent crystal quality, graphene has a huge specific surface area (2630 m 2 g -1 ), while in conductivity (electron mobility 20000 cm 2 V -1 the s -1 ), thermal conductivity (thermal conductivity 5300 Wm -1 k -1 ), mechanical strength (strength limit 42 Nm -1 ) and other aspects have shown very excellent characteristics. In 2004, Geim A. and Novoselov K. of the University of Manchester in the United Kingdom separated graphene from graphite for the f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/50C23C16/26
Inventor 薄拯岑可法严建华王智化池涌
Owner ZHEJIANG UNIV
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