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Iodine-doped graphene thin film with high thermal stability and method for preparing iodine-doped graphene thin film

A graphene film, high thermal stability technology, applied in graphene, chemical instruments and methods, nano-carbon, etc., can solve problems such as doping, and achieve the effect of reducing resistance, enhancing interaction force, and improving thermal stability

Inactive Publication Date: 2018-08-21
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are two post-processing methods, one is dry doping, that is, atoms and molecules are evaporated on the surface of two-dimensional materials under vacuum conditions, or plasma treatment is performed on two-dimensional materials. The doping of two-dimensional material microchips, but it is ineffective for the more widely used two-dimensional material thin films in industry

Method used

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  • Iodine-doped graphene thin film with high thermal stability and method for preparing iodine-doped graphene thin film
  • Iodine-doped graphene thin film with high thermal stability and method for preparing iodine-doped graphene thin film

Examples

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Embodiment 1

[0027] The highly thermally stable iodine-doped graphene film of this embodiment is composed of multilayer graphene microflakes doped with iodine dopant, and the multilayer graphene microflakes are randomly stacked along its plane direction, and the iodine dopant Exists in the form of atoms and ions.

[0028] The preparation method of the high thermal stability iodine-doped graphene film of the present embodiment comprises the following steps:

[0029] Step 1, cleaning and drying the glass in sequence;

[0030] Step 2: Add 50g of graphite powder into 1L of N-methylpyrrolidone, stir for 30min under the condition of 4000rpm and let it stand for 3h to obtain a suspension of graphene microflakes, the graphite in the suspension of graphene microflakes The number of layers of graphene microsheets is 2 to 4 layers. Add 10 g of ethyl cellulose to the suspension of graphene microsheets, then centrifuge to remove precipitated particles to obtain a supernatant, and add ethylene glycol t...

Embodiment 2

[0038] The highly thermally stable iodine-doped graphene film of this embodiment is composed of multilayer graphene microflakes doped with iodine dopant, and the multilayer graphene microflakes are randomly stacked along its plane direction, and the iodine dopant Exists in the form of atoms and ions.

[0039] The preparation method of the high thermal stability iodine-doped graphene film of the present embodiment comprises the following steps:

[0040] Step 1, cleaning and drying the glass in sequence;

[0041]Step 2: Add 50g of graphite powder into 1L of N-methylpyrrolidone, stir for 30min under the condition of 4000rpm and let it stand for 3h to obtain a suspension of graphene microflakes, the graphite in the suspension of graphene microflakes The number of layers of graphene microsheets is 2 to 4 layers. Add 10 g of ethyl cellulose to the suspension of graphene microsheets, then centrifuge to remove precipitated particles to obtain a supernatant, and add ethylene glycol to...

Embodiment 3

[0047] The highly thermally stable iodine-doped graphene film of this embodiment is composed of multilayer graphene microflakes doped with iodine dopant, and the multilayer graphene microflakes are randomly stacked along its plane direction, and the iodine dopant Exists in the form of atoms and ions.

[0048] The preparation method of the high thermal stability iodine-doped graphene film of the present embodiment comprises the following steps:

[0049] Step 1, cleaning and drying the glass in sequence;

[0050] Step 2: Add 50g of graphite powder into 1L of N-methylpyrrolidone, stir for 30min under the condition of 4000rpm and let it stand for 3h to obtain a suspension of graphene microflakes, the graphite in the suspension of graphene microflakes The number of layers of graphene microsheets is 2 to 4 layers. Add 10 g of ethyl cellulose to the suspension of graphene microsheets, then centrifuge to remove precipitated particles to obtain a supernatant, and add ethylene glycol t...

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Abstract

The invention discloses an iodine-doped graphene thin film with high thermal stability. The iodine-doped graphene thin film comprises multilayer graphene nanoplatelets mixed with iodine dopants. The multilayer graphene nanoplatelets are randomly stacked along the directions of planes of the multilayer graphene nanoplatelets. The invention further discloses a method for preparing the iodine-doped graphene thin film with the high thermal stability. The method includes depositing graphene nanoplatelets on substrates to form graphene thin films; depositing the iodine dopants on the graphene thin films to obtain the iodine-doped graphene thin film. The iodine-doped graphene thin film and the method have the advantages that the multilayer graphene nanoplatelets are stacked to form compact structures of the iodine-doped graphene thin film, acting force between the graphene nanoplatelets and the iodine dopants can be enhanced, the steric hindrance of the iodine dopants can be enlarged, the iodine dopants are difficult to escape or volatile, and accordingly the thermal stability of the iodine-doped graphene thin film can be improved; array structures of graphene and the iodine dopants are improved by the aid of step-by-step deposition processes, accordingly, the iodine-doped graphene thin film prepared by the aid of the method is still thermally stable even under the condition of the high temperatures of 500 DEG C, obvious effects can be realized, and the iodine-doped graphene thin film and the method are suitable for popularization.

Description

technical field [0001] The invention belongs to the technical field of surface material preparation, and in particular relates to a highly thermally stable iodine-doped graphene film and a preparation method thereof. Background technique [0002] Two-dimensional materials are materials with atomic-thick sheet structures. Due to their unique electrical, optical, thermal, mechanical and chemical properties, they have great application potential in many fields such as materials and machinery. Common two-dimensional materials include graphene, boron nitride, transition metal dichalcogenides such as molybdenum sulfide, tungsten sulfide, molybdenum selenide, tungsten selenide, etc. Among them, graphene as a sp 2 Hybrid two-dimensional single-layer graphitic carbon material, whose stable hexagonal shape makes it have excellent electrical and thermal properties. Graphene can be made into a transparent conductive film, which can be used in transparent electrodes of touch screens, o...

Claims

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Application Information

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IPC IPC(8): C01B32/194
CPCC01B2204/24C01B32/194
Inventor 吴彪张志滨
Owner NORTHWEST UNIV
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