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Flexible field electron emission cathode material based on three-dimensional VS2/Zno composite nano-structure and preparation method thereof

A technology of composite nanostructure and field electron emission, which is applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, and can solve problems such as the research and application of nanosheets and ZnO nanoparticle heterojunctions. , to achieve excellent application prospects, multiple launch positions, and resource-saving effects

Inactive Publication Date: 2014-04-30
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Recently, a variety of ZnO-based heterojunction structure systems have attracted the attention of many researchers, but there is no VS in the prior art 2 Research and Application of Heterojunction of Nanoflakes and ZnO Nanoparticles

Method used

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  • Flexible field electron emission cathode material based on three-dimensional VS2/Zno composite nano-structure and preparation method thereof
  • Flexible field electron emission cathode material based on three-dimensional VS2/Zno composite nano-structure and preparation method thereof
  • Flexible field electron emission cathode material based on three-dimensional VS2/Zno composite nano-structure and preparation method thereof

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preparation example Construction

[0038] Three-dimensional VS of the present invention 2 The preparation method of / ZnO composite nanostructure comprises the steps:

[0039] (1) Utilize hydrothermal method, prepare VS respectively 2 Nanoflake suspensions and aqueous suspensions of ZnO nanoparticles;

[0040] (2) Drop the aforementioned ZnO nanoparticle suspension into the VS in the state of sonication 2 Suspension of nanoflakes, and ultrasonic treatment, after standing still, the precipitate was collected, washed and dried to obtain gray-black powder VS 2 / ZnO composite nanoparticles;

[0041] (3) under an inert gas protection atmosphere, the VS obtained in step (2) 2 / ZnO composite nanoparticles are annealed to obtain the three-dimensional VS as claimed in claim 1 2 / ZnO composite nanostructures.

[0042] The present invention based on PET three-dimensional VS 2 The preparation method of the flexible field electron emission material of / ZnO composite nanostructure comprises the following steps:

[0043...

Embodiment 1

[0051] 1. Clean the 0.2mm thick reinforced PET film and cut it into small pieces of about 2cm×2cm;

[0052] 2. Deposit about 20nm thick gold film on the surface of PET film by sputtering method and lead out the electrode leads;

[0053] 3. Add 10mmol sodium orthovanadate and 50mmol thioacetamide powder to 100mL deionized water, and stir for 30 minutes;

[0054] 4. Wash the Teflon reactor with a capacity of 100mL, and slowly add the above-mentioned mixed solution;

[0055] 5. Put the sealed reaction kettle into the heating furnace, set the furnace temperature to 170°C, and the reaction time to 16 hours;

[0056] 6. After the reaction, cool down to room temperature naturally, pour out the reaction solution, and take out the precipitated gray-black powder. After being washed several times with ethanol and deionized water, it was sonicated in 50 mL of deionized water for 1 hour. get black vs 2 The suspension was sealed and allowed to stand for 24 hours, and then 25 mL of the u...

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Abstract

The invention discloses a three-dimensional VS2 / Zno composite nano-structure and a preparation method. The three-dimensional VS2 / Zno composite nano-structure comprises VS2 nano-sheet and ZnO nano-particles, the VS2 nano-sheet serves as a framework, the ZnO nano-particles are evenly distributed on the surface and the edge of the VS2 nano-sheet to form the VS2 / Zno composite nano-structure. The invention further provides a flexible reinforced PET (polyethylene terephthalate) substrate field electron emission cathode material based on three-dimensional VS2 / Zno composite nano-structure and a preparation method. The preparation method has the advantages of being low in cost, simple in preparation condition, high in complexity and the like. In addition, impurities are less. The three-dimensional VS2 / Zno composite nano-structure and the field electron emission cathode material are high in crystallinity, stable in structure and large in specific area, the edge is ultrathin, and excellent flexible field electron emission performance is achieved.

Description

technical field [0001] The invention relates to the technical field of metalloids, semiconductor materials and devices, in particular to a flexible three-dimensional VS 2 / ZnO nanocomposite nanostructure and flexible field electron emission cathode material based on it and its preparation method. Background technique [0002] vs. 2 It is a new type of layered transition metal sulfide. Its structure is a two-dimensional layered structure composed of two layers of sulfur atoms and a layer of vanadium atoms, which is similar to a sandwich structure. It has high conductivity, large surface area and good The mechanical flexibility shows good application potential in the fields of supercapacitors, lithium batteries and sensors. due to VS 2 Unique physical and chemical properties, it is also a good field electron emission material, but due to VS 2 The edge of the nano-layered material is thin, and in the case of high electric field, the edge of the nanosheet may be partially da...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J1/308B82Y30/00B82Y40/00
Inventor 宋长青郁可尹海宏朱自强
Owner EAST CHINA NORMAL UNIV
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