Method for preparing functionalized graphene based on high-energy irradiation one-step method

An irradiation and functional technology, which is applied in the field of one-step preparation of functionalized graphene based on high-energy irradiation, can solve the problems of easily damaged graphene structure, and achieve the effects of strong penetrating power, low cost and simple operation process

Inactive Publication Date: 2012-07-18
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The former brings new functions to graphene nanosheets, but easily destroys the structure of graphene, whi

Method used

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  • Method for preparing functionalized graphene based on high-energy irradiation one-step method
  • Method for preparing functionalized graphene based on high-energy irradiation one-step method
  • Method for preparing functionalized graphene based on high-energy irradiation one-step method

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Effect test

Embodiment 1

[0015] Dry the graphite oxide powder prepared according to the method described in the document "Improved Synthesis of Graphene Oxide" to obtain graphite oxide powder, take 50 mg of the prepared graphite oxide powder, and add it to a glass bottle containing 50 mL of epichlorohydrin reagent , the mixed solution was ultrasonically dispersed for 1 hour, and then the glass bottle containing the above dispersion was placed in 60 In the γ-ray irradiation room of Co, the irradiation dose rate is 2.0×10 3 Gy / h, the irradiation dose is 2×10 5 Under the condition of Gy, γ-ray irradiation is carried out, the irradiation time is 100 hours, and the irradiation temperature is room temperature, so that the surface of graphite oxide is peeled off to form graphene nanosheets. The above-mentioned obtained graphene nanosheets were analyzed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy, and compared with graphite oxide before irradiation, the results are as follows: figure 1 ,...

Embodiment 2

[0017] The graphite oxide powder prepared according to the method described in the document "Improved synthesis of graphene oxide" was dried to obtain graphite oxide powder, and 40 mg of the prepared graphite oxide powder was added to a 100 mL styrene / acetone solution (50 wt % ) in a glass bottle, the mixed solution was ultrasonically dispersed for 2 hours, and then the glass bottle containing the above dispersion was placed in 60 In the γ-ray irradiation room of Co, the irradiation dose rate is 1.0×10 3 Gy / h, the irradiation dose is 5×10 5 Under the condition of Gy, γ-ray irradiation is carried out, the irradiation time is 500 hours, and the irradiation temperature is 50° C., so that the surface of graphite oxide is peeled off to form graphene nanosheets. According to XRD analysis and XPS elemental analysis, styrene has been successfully grafted onto the surface of graphite oxide, and functionalized graphene nanosheets were obtained by exfoliation.

Embodiment 3

[0019] Dry the graphite oxide powder prepared according to the method described in the document "Improved synthesis of graphene oxide" to obtain graphite oxide powder, take 100 mg of the prepared graphite oxide powder, and add it to a container containing 100 mL of acrylic acid / water solution (10 wt %) In a glass bottle, the mixed solution was ultrasonically dispersed for 2 hours, and then the glass bottle containing the above dispersion was placed in 60 In the γ-ray irradiation room of Co, the irradiation dose rate is 2.0×10 3 Gy / h, the irradiation dose is 3×10 4 Under the condition of Gy, γ-ray irradiation is carried out, the irradiation time is 15 hours, and the irradiation temperature is 40° C., so that the surface of graphite oxide is exfoliated to form graphene nanosheets. According to XRD analysis and XPS elemental analysis, acrylic acid has been successfully grafted onto the surface of graphite oxide, and functionalized graphene nanosheets were obtained by exfoliation...

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Abstract

The invention discloses a method for preparing functionalized graphene based on a high-energy irradiation one-step method. The method comprises the following steps of: mixing graphite oxide and polar small molecular organic solvent, and performing ultrasonic dispersion treatment on the mixed solution for 0.5 to 2 hours, wherein the polar small molecular organic solvent is one or more of epoxy chloropropane, styrene/ acetone solution, acrylic acid and lactic acid; and putting the dispersion in an irradiation source chamber of 60 Co, performing gamma ray irradiation on the mixed solution under the conditions that the irradiation dose rate is 0.6*10<3> to 6*10<3>Gy/h and the irradiation dose is 1*10<4> to 2*10<6>Gy, so that the surface of the graphite oxide is peeled, and functionalized graphene nano sheets are formed. By using the characteristics of high energy and strong penetrating power of gamma ray particles in the method, the functionalized small molecular organic substance intercalated into graphite oxide layers and the graphite oxide layers undergo grafting reaction, so that the distance between the graphite oxide layers is increased, and the graphene nano sheets are formed by peeling.

Description

technical field [0001] The invention belongs to the technical field of structural modification of inorganic carbon materials, in particular to a method for preparing functionalized graphene in one step based on high-energy irradiation. Background technique [0002] Graphene is composed of a dense layer of carbon atoms wrapped in a honeycomb crystal lattice. It is the thinnest two-dimensional material in the world, with a thickness of only 0.35nm. This special structure contains rich and novel physical phenomena, which makes graphene exhibit many excellent properties. For example: the strength of graphene is more than 100 times that of steel, the highest material tested; its carrier mobility is twice that of the currently known indium antimonide material with the highest mobility; its thermal conductivity is that of diamond. 3 times; and it also has special properties such as room temperature quantum Hall effect and room temperature ferromagnetism. [0003] In recent years,...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y40/00C01B32/19C01B32/225C01B32/23
Inventor 徐志伟陈磊张瑶瑶许广昀李英琳刘梁森单明景
Owner TIANJIN POLYTECHNIC UNIV
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