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A kind of preparation method of graphene-carbon nanotube composite glass

A carbon nanotube composite and carbon nanotube technology, which is applied in the coating and other directions, can solve the problems of high surface resistance, weak ability to catalyze the cracking of carbon precursors, and limit the electrical conductivity of graphene, so as to improve electrical conductivity and thermal conductivity. performance, solve compatibility problems, and improve growth quality

Active Publication Date: 2020-08-28
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical bottleneck of the direct growth of graphene on the glass surface is: the ability of the glass itself to catalyze the cracking of the carbon precursor is very weak, and the carbon precursor mainly relies on thermal cracking, so that the nucleation and growth of graphene on the glass surface are relatively difficult
The main disadvantage of the developed graphene glass preparation technology is that the graphene domains grown on the glass surface are generally tens to hundreds of nanometers, and the maximum is no more than a few microns. Even if spliced ​​into a film, the surface resistance is still high, so In fact, the excellent electrical conductivity of graphene is limited, which seriously affects the future industrial application of graphene glass.

Method used

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  • A kind of preparation method of graphene-carbon nanotube composite glass
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  • A kind of preparation method of graphene-carbon nanotube composite glass

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Experimental program
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Effect test

Embodiment 1

[0038] Ultrasonic cleaning method is used to place 1.5cm*1.5cm soda-lime glass in deionized water, ethanol, and acetone for 10 minutes, then blow dry with nitrogen, clean it, place it horizontally in a graphite boat, and place it in high temperature as a whole. Tube furnace reaction chamber, filled with Ar / H 2 =150 / 30 sccm, Ar and H 2 The partial pressures are 0.54atm and 0.20atm respectively, the temperature is raised to 1020°C, and the methane gas valve is opened after annealing for 30 minutes. After methane enters the reaction chamber, it is decomposed into activated carbon species, adsorbed on the surface of molten glass, migrates and collides on the surface, thereby realizing graphene- Nucleation and growth of carbon nanotubes. The methane flow rate is set to 10sccm, the partial pressure is 0.1atm, the graphene growth process is set to 3 hours, stop feeding methane after the growth is over, and the Ar / H 2 =150 / 30sccm atmosphere to start the cooling process of the sample...

Embodiment 2

[0041] Ultrasonic cleaning method is used to place 1.5cm*1.5cm soda-lime glass in deionized water, ethanol, and acetone for 10 minutes, then blow dry with nitrogen, clean it, place it horizontally in a graphite boat, and place it in high temperature as a whole. Tube furnace reaction chamber, filled with Ar / H 2 = 100 / 10 sccm, Ar and H 2 The partial pressures are 0.82atm and 0.35atm respectively, and the temperature is raised to 990°C. After annealing for 30 minutes, the ethanol vapor valve is opened and the ethanol vapor enters the reaction chamber and then cracks into activated carbon species, which are adsorbed on the surface of molten glass, migrate and collide on the surface, thereby realizing graphene - Nucleation and growth of carbon nanotubes. The ethanol vapor flow rate is set to 20sccm, the partial pressure is 0.2atm, the graphene growth process is set to 0.5 hours, and the ethanol vapor is stopped after the growth ends, and the Ar / H 2 =100 / 10sccm atmosphere to start...

Embodiment 3

[0044] Ultrasonic cleaning method is used to place 1.5cm*1.5cm colored glass in deionized water, ethanol, and acetone for 10 minutes, blow dry with nitrogen, clean it, place it horizontally in a graphite boat, and put it into a high-temperature tube as a whole Type furnace reaction chamber, into the Ar / H 2 =120 / 50 sccm, Ar and H 2 The partial pressures are 0.6atm and 0.050atm respectively, and the temperature is raised to 1060°C. After annealing for 30 minutes, the ethane gas valve is opened. After ethane enters the reaction chamber, it is cracked into activated carbon species, adsorbed on the surface of molten glass, migrates and collides on the surface, thereby realizing graphene - Nucleation and growth of carbon nanotubes. The ethane flow rate was set to 5 sccm, the partial pressure was 0.025 atm, the graphene growth process was set to 5 hours, and the ethane flow was stopped after the growth was completed. 2 =120 / 50sccm atmosphere to start the cooling process of the samp...

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Abstract

The invention discloses a graphene-carbon nano-tube composite glass preparation method, which comprises: 1) ultrasonically cleaning a low softening temperature glass; 2) placing the cleaned low softening temperature glass in a high temperature tubular furnace, introducing Ar and H2 into a reaction chamber, and heating the reaction chamber to a temperature of 990-1060 DEG C; 3) annealing the low softening temperature glass, introducing a carbon-derived gas into the reaction chamber after the metal element is reduced to the surface of the glass, and carrying out graphene-carbon nano-tube composite film growth for 0.5-5 h; and 4) closing the carbon-derived gas after completing the graphene-carbon nano-tube composite film growth, and closing Ar / H2 after the temperature is lowered to a room temperature so as to obtain the graphene-carbon nano-tube composite glass. With the method of the present invention, the low surface resistance transparent electric-conduction glass can be obtained underthe premise of the ensuring of the high light transmittance of the graphene glass, and has the thermal stability and the chemical stability far superior to the common ITO glass.

Description

technical field [0001] The invention belongs to the field of functional materials. Specifically, the invention relates to a method of using low-softening temperature glass as a growth substrate, using methane or ethanol as a precursor, and utilizing trace metal elements contained in the glass to produce a chemical vapor deposition (CVD) , directly growing thin films of graphene-carbon nanotube composites on low softening temperature glass to obtain highly stable transparent conductive glass. Background technique [0002] Glass has the characteristics of good light transmission, high mechanical strength, high chemical stability, low electrical conductivity, low thermal conductivity, and low cost. It is a traditional material that has been widely used in all aspects of social life. Graphene has advantages that are incomparable to other materials such as high carrier mobility at room temperature, high specific surface area, high thermal conductivity, high strength, and good che...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/22
CPCC03C17/22C03C2217/29
Inventor 刘忠范陈召龙王若嵛张艳锋
Owner PEKING UNIV