A graphene-coated metal nanowire network and preparation method thereof

A technology coated with metal nanowires and graphene, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve problems such as poor stability, lower transmittance or electrical conductivity, and achieve improved The effect of stability, easy control, and simple method

Active Publication Date: 2020-09-22
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The method of the present invention solves the following technical defects in the prior art: for the poor stability of the transparent conductive material of the metal nanowire network, the existing method for improving the stability of the metal nanowire network tends to reduce its transmittance or electrical conductivity, and relies on Under harsh conditions such as high temperature

Method used

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  • A graphene-coated metal nanowire network and preparation method thereof
  • A graphene-coated metal nanowire network and preparation method thereof
  • A graphene-coated metal nanowire network and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1, the preparation of the silver nanowire grid coated with graphene

[0052] First, preparation of silver nanowire network by solution method: electrospinning and preparation of silver seed layer: first, preparation of electrospinning precursor solution. 8% PVB and 5% SnCl 2 Dissolve in n-butanol, place on a magnetic stirrer, keep the rotation speed at 600 rpm, and stir for 4 hours. Then, PVB / SnCl was spun out using electrospinning equipment 2 For nanofibers, the collection device is a glass slide. The conditions of electrospinning were as follows: the applied voltage was +8 kV, the distance between the nozzle and the collector was 20 cm, and the flow rate of the precursor solution was 0.6 mL / h.

[0053] Electroless deposition of silver: The process of electroless deposition is realized by silver mirror reaction. The sample that has grown the silver seed layer is vertically immersed in a uniformly stirred 5g / L glucose solution, and the glucose solution is...

Embodiment 2

[0060] Embodiment 2, the preparation of the silver nanowire grid coated with zinc oxide

[0061] First, a silver nanowire network was prepared in the same manner as in Example 1.

[0062] Then, zinc nitrate aqueous solution (concentration: 0.1M / L) was used as the electrolyte, heated in a water bath at 70°C, the prepared silver nanowire network was used as the cathode, and the zinc sheet was used as the anode, the applied current was 15mA, and the reaction time was 10s. Zinc-coated silver nanowire network.

[0063] The scanning electron micrograph of the silver nanowire coated with zinc oxide prepared in this embodiment is as follows Figure 5 As shown, it can be seen that zinc oxide exists on the surface of the silver nanowires by comparing the silver nanowires alone.

[0064] The silver nanowire network prepared in this example and the zinc oxide-coated silver nanowire network are kept at a relative humidity of 85% and a temperature of 85°C for 110 hours. Figure 6 As show...

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Abstract

The invention discloses a metal nanowire network coated with graphene or metal oxide and a preparation method thereof. The preparation method comprises the following steps that a metal nanowire grid is prepared on a substrate, and then the following 1) or 2) is carried out; 1), graphene oxide is deposited on the surface of the metal nanowire grid by utilizing an electrochemical deposition method, the graphene oxide is reduced to the graphene, and then the metal nanowire grid coated with the graphene is obtained; and 2), the metal oxide is deposited on the surface of the metal nanowire grid by utilizing the electrochemical deposition method, and then the metal nanowire grid coated with the metal oxide is obtained. According to the preparation method, the graphene or the metal oxide is selectively deposited on the surface of the metal nanowire network by utilizing electrochemical deposition, and thus the stability of the metal nanowire network is improved without influencing the photoelectric property of the metal nanowire network; and the thickness of the shell layer of the graphene or the metal oxide can be controlled by controlling reaction conditions of the electrochemical deposition, and the transmittance of the metal nanowire network is hardly reduced.

Description

technical field [0001] The invention relates to a graphene-coated metal nanowire network and a preparation method thereof, belonging to the field of transparent conductive materials. Background technique [0002] The metal nanowire network has the advantages of high electrical conductivity, bending resistance, and easy preparation, and is expected to have practical applications in the fields of flexible touch screens, stretchable transparent electric heaters, and polymer solar cells. However, due to the large specific surface area of ​​metal nanowires, a large number of surface atoms and surface dangling bonds, they will rapidly oxidize and lose conductivity in the air or in high temperature, high humidity, oxygen-rich environments, etc. Long-term use in optoelectronic devices. Researchers often use stable materials to protect the metal nanowire network, and improve the stability of the metal nanowire network by passivating surface atoms. Commonly used protective layer mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D9/04C25D7/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C25D7/00C25D9/04
Inventor 马剑钢杨阳李鹏徐海阳刘益春
Owner NORTHEAST NORMAL UNIVERSITY
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