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Preparation method of graphene transparent conductive film

A technology of transparent conductive film and graphene, which is applied in the direction of graphene, cable/conductor manufacturing, chemical instruments and methods, etc., can solve the problems of high heat treatment temperature, low utilization rate of raw materials, poor reduction effect, etc., and achieve simple preparation method, The effect of controllable film thickness and low cost

Inactive Publication Date: 2015-07-01
SHENYANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, they have disadvantages such as poor reduction effect, high heat treatment temperature and low utilization rate of raw materials.

Method used

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  • Preparation method of graphene transparent conductive film
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Embodiment 1

[0015] A preparation method of graphene transparent conductive film, comprising the following steps:

[0016] (1) Preparation of graphite oxide: first measure 138ml concentrated H 2 SO 4 Pour into ice bath, then add 1.5g graphite powder and 0.75g NaNO 3 , magnetically stirred for 30min; then slowly added 4.5g KMnO 4 , the reaction mixture was magnetically stirred in a water bath at 35°C for 12h; then 4.5g KMnO was added slowly 4 , control the reaction temperature at 35°C, continue magnetic stirring for 12h; pour the reaction mixture into a beaker filled with about 200ml of ice cubes, stir continuously with a glass rod, and then add 30% H 2 o 2 Until the solution is golden yellow; then filter while it is hot, wash once with 5% HCl, and then wash with deionized water until the solution is neutral, then centrifuge at a speed of 5000rpm for 7min to remove large particles and graphite that is not completely oxidized; finally, After ultrasonic treatment for 5 minutes, it was po...

Embodiment 2

[0022] A preparation method of graphene transparent conductive film, comprising the following steps:

[0023] (1) Preparation of graphite oxide: first measure 130ml concentrated H 2 SO 4 Pour into ice bath, then add 1.5g graphite powder and 0.75g NaNO 3 , magnetically stirred for 30min; then slowly added 4.5g KMnO 4 , the reaction mixture was magnetically stirred in a water bath at 35°C for 10 min; then 4.5 g of KMnO was added slowly 4 , control the reaction temperature to 35° C., and continue magnetic stirring for 10 h. Pour the reaction mixture into a beaker filled with about 200ml of ice cubes, stir continuously with a glass rod, and then add 30% H 2 o 2 until the solution turns golden yellow. Then filter while it is hot, wash once with 5% HCl, and then wash with deionized water until the solution is neutral, then centrifuge at a speed of 5000rpm for 7min to remove large particles and graphite that has not been completely oxidized; finally, after 5min ultrasonic treat...

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Abstract

The invention discloses a preparation method of a graphene transparent conductive film. The preparation method comprises the following steps: 1, preparation of graphite oxide; 2, preparation of graphene oxide; 3, preparation of graphene; 4, hydrophilic treatment of glass; 5, preparation of a graphene film. Graphene obtained by reduction in two steps has good reduction effects, the reduced graphene oxide is dispersed by N,N-dimethylformamide and then spin-coated to obtain the graphene transparent conductive film. When the light transmittance of the transparent conductive film is 70%, the conductivity reaches 92 S / cm. The preparation method has the main advantages that the raw materials have high utilization rate and low cost, the preparation method is simple and the film has controllable thickness and good conductivity.

Description

technical field [0001] The invention belongs to the technical field of nano-optoelectronic materials, in particular to a method for preparing a low-cost graphene transparent conductive film. Background technique [0002] Graphene is a two-dimensional honeycomb grid structure composed of single atomic layers of carbon [Allen M J, Tung V C, Kaner R B. Chemical Reviews. 2010, 110, 132-145]. At the same time, it is also the basic unit of other carbon allotropes. It can be folded into zero-dimensional fullerenes, curled into one-dimensional carbon nanotubes, and stacked into three-dimensional graphite [Geim A K, Novoselov K S. Nature Materials .2007, 6, 183-191]. The excellent electrical conductivity and light transmission of graphene make graphene have a wide range of application prospects. The use of graphene films to replace transparent conductive materials in existing electronic devices is expected to greatly improve the performance of existing devices. [0003] The prepar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04H01B13/00C01B32/184C01B32/194C03C17/22
Inventor 侯朝霞周银李光彬王少洪王美涵胡小丹
Owner SHENYANG UNIV
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