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Method of preparing three-dimensional graphene glass composite

A composite material, graphene technology

Active Publication Date: 2017-10-27
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current preparation method based on graphene glass is mainly to grow graphene in a high-temperature thermal CVD furnace at 1000-1200 ° C. The growth time generally takes 2-4 hours, and most of the glass substrates are made of high-temperature resistant quartz glass, which greatly increases the graphene. The cost of glass preparation and the small size of quartz glass are not conducive to the industrial application of graphene glass

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  • Method of preparing three-dimensional graphene glass composite
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  • Method of preparing three-dimensional graphene glass composite

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Experimental program
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Effect test

Embodiment 1

[0058] Embodiment 1: the preparation of graphene glass

[0059] Put the cleaned 6-inch ordinary soda-lime glass on the reaction substrate, and use plasma-enhanced chemical vapor deposition technology to grow graphene glass with controllable transmittance and conductivity. figure 1 It is a schematic diagram of the process and principle of growing three-dimensional vertical structure graphene based on the PECVD system of the present invention. Concrete growth method comprises the following steps:

[0060] 1) Cleaning of ordinary soda-lime glass substrates:

[0061] Put a 10cmx10cm ordinary soda-lime glass substrate into ethanol, acetone, and isopropanol solutions for ultrasonic cleaning, and finally use deionized water for ultrasonic cleaning, and blow dry with nitrogen to obtain a clean glass substrate;

[0062] 2) Low temperature growth of graphene:

[0063] The growth method is based on the PECVD system, and utilizes direct current plasma enhanced chemical vapor deposition...

Embodiment 2

[0064] Example 2: Preparation of graphene glass under different growth temperatures below 600°C

[0065] The glass substrate used in the present invention is common soda-lime glass in people's daily life, which is an amorphous oxide mainly composed of silicon dioxide, calcium oxide and sodium oxide. It has poor thermal conductivity and cannot conduct electricity. The softening point of the glass is generally at Around 600°C. Most of the glass substrates currently reported use quartz glass and sapphire glass, and graphene is grown at a high temperature by chemical vapor deposition technology at 1000-1200 °C, and the growth time is often several hours, which greatly restricts the production cost. industrial application of graphene glass. At present, the present invention uses DC plasma enhanced chemical vapor deposition technology to generate high-energy electrons through DC high voltage. When the reaction gas is introduced into the chamber, the gas and electrons collide and io...

Embodiment 3

[0067] Example 3: Morphological changes of graphene on ordinary glass substrates controlled by growth time

[0068] During the growth process, the obtained graphene has a special three-dimensional structure due to the mutual modulation of electric field, interfacial energy, diffusion energy and other factors, and the structural characteristics are as follows: image 3 As shown, the graphene nanosheets are perpendicular to the growth substrate, the height is about tens of nanometers, the thickness is controllable from 1-10 layers, and the length varies from tens to hundreds of nanometers. The graphene nanosheets are stacked to form a network-like nanopore structure. . By adjusting the growth time of graphene, the vertical height of graphene can be continuously adjusted from 1 nm to 100 nm ( Figure 4), graphene glass samples with different transmittance and surface resistance can be obtained, and then the use of graphene glass to meet different needs.

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Abstract

The invention discloses a method of preparing a three-dimensional graphene glass composite, which comprises the steps of providing a glass substrate, and directly growing graphene on the surface of the glass substrate by a plasma-enhanced chemical vapor deposition method. Compared with graphene glass prepared by the traditional transfer and oxidation reduction method, the preparation method is simple; cohesion with the glass substrate is high; vertical height control of a graphene nanosheet is precise; and the repeatability is high. In addition, the preparation method adopts the most common soda lime glass in daily life of people, so that compared with quartz glass and sapphire glass used in other experiments, the cost is greatly lowered. The method can realize uniform, controllable and quick preparation of graphene glass below the glass softening point temperature (600 DEG C), requires no catalyst, greatly simplifies a preparation growth technology of the graphene glass, and provides a premise for a subsequent industrial application.

Description

technical field [0001] The invention belongs to the field of preparation of functional materials, and in particular relates to a method for direct low-temperature, large-area, and rapid growth of graphene on an ordinary soda-lime glass substrate. The invention can realize three-dimensional structure graphite below the softening point of ordinary glass without the aid of a catalyst Fast, large-scale fabrication of olefinic glasses. Background technique [0002] Graphene has many excellent physical properties, such as ultra-high mechanical strength, ultra-high carrier mobility (up to 200,000 cm 2 ·V –1 ·s –1 ) and thermal conductivity, excellent electrical conductivity and light transmittance, making it widely used in transparent conductive films, supercapacitors, field effect transistors, photodetection, lithium-ion batteries, DNA sequencing, refractive index biosensors, functional composite materials and many other fields All have broad application prospects. Compared wi...

Claims

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Application Information

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IPC IPC(8): C03C17/22
CPCC03C17/22C03C2217/28C03C2218/153
Inventor 刘忠范慈海娜张艳锋
Owner PEKING UNIV
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