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Method for rapid preparation of grapheme/silver sulfide quantum dot nanocomposite and product

A nanocomposite material and graphene technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of poor product quality and cumbersome preparation process, and achieve low energy consumption and high application prospects Broad range of effects with mild reaction conditions

Inactive Publication Date: 2015-03-25
HUNAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of this research is to solve the problem of cumbersome preparation process and poor product quality of graphene nanoparticle composites loaded with quantum dots, and provide a method for rapid preparation of graphene / silver sulfide quantum dot nanocomposites

Method used

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  • Method for rapid preparation of grapheme/silver sulfide quantum dot nanocomposite and product
  • Method for rapid preparation of grapheme/silver sulfide quantum dot nanocomposite and product
  • Method for rapid preparation of grapheme/silver sulfide quantum dot nanocomposite and product

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Embodiment 1

[0027] Graphene oxide (40 mg) and AgNO 3 (67.5 mg) was dispersed in dimethyl sulfoxide solution (50 mL). After vigorous stirring, the solution was transferred to a polytetrafluoroethylene-lined stainless steel autoclave and reacted at 180 °C for 12 h. The obtained solution was intensively rinsed with acetone, and then cleaned with alcohol in an ultrasonic cleaner to remove unreacted reactants and silver sulfide quantum dots not bound to the graphene sheet. The product was centrifuged at 4000 rpm and then dried in a vacuum desiccator. The composite material prepared in the experiment has a good and stable single-layer structure with good stability, and the particle size of the loaded silver sulfide quantum dots is about 10 nm. The infrared spectrograms of the prepared graphene oxide and graphene / silver sulfide quantum dot nanocomposites are shown in figure 1 . It can be observed from the figure that the O-H stretching vibration absorption peak of the graphene / silver sulfide...

Embodiment 2

[0029] Graphene oxide (40 mg) and AgNO 3 (67.5 mg) was dispersed into dimethyl sulfoxide solution (50 mL). After vigorous stirring, the solution was transferred to a polytetrafluoroethylene-lined stainless steel autoclave and reacted at 180 °C for 15 h. The obtained solution was intensively rinsed with acetone, and then cleaned with alcohol in an ultrasonic cleaner to remove unreacted reactants and silver sulfide quantum dots not bound to the graphene sheet. The product was centrifuged at 4000 rpm and then dried in a vacuum desiccator. The composite material prepared in the experiment has a good and stable single-layer structure with good stability, and the particle size of the loaded silver sulfide quantum dots is about 12 nm.

Embodiment 3

[0031] Graphene oxide (40 mg) and AgNO 3 (67.5 mg) was dispersed into dimethyl sulfoxide solution (50 mL). After vigorous stirring, the solution was transferred to a Teflon-lined stainless steel autoclave at 160 °C for 10 h. The obtained solution was intensively rinsed with acetone, and then cleaned with alcohol in an ultrasonic cleaner to remove unreacted reactants and silver sulfide quantum dots not bound to the graphene sheet. The product was centrifuged at 4000 rpm and then dried in a vacuum desiccator. The composite material prepared in the experiment has a good and stable single-layer structure with good stability, and the particle size of the loaded silver sulfide quantum dots is about 8 nm. The graphene and the graphene / silver sulfide quantum dot nanocomposite material fluorescence spectrum contrast graph that prepares are shown in image 3. From the curve (b) in the figure, it can be seen that the pure graphene material has no obvious fluorescence effect. When the...

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Abstract

The invention relates to a method for rapid preparation of a grapheme / silver sulfide quantum dot nanocomposite. The method includes the steps that graphene oxide and AgNO3 are scattered in a dimethyl sulfoxide solution, and the solution is stirred and then transferred into a high pressure reactor for a reaction at the temperature of 150 DEG C to 200 DEG C for 10-15 hours; a product generated from the reaction is rinsed with acetone many times and is cleaned through ethyl alcohol in an ultrasonic vibration mode, and the grapheme / silver sulfide quantum dot nanocomposite is obtained through centrifugal separation and vacuum drying, is of a good and stable single-layer structure and has the photoelectronic property. The method has the advantages that the preparation process is simple and power consumption is low, and both productivity and product performance are greatly promoted in production preparation.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and relates to a graphene / silver sulfide quantum dot nano composite material and a preparation method. Background technique [0002] Graphene, since it was successfully isolated and characterized by Geim and Novoselov of the University of Manchester in 2004, has become a star material that scientists have focused on due to its excellent properties. Graphene is a single-layer and multi-layer layered structure material with large specific surface area and pore volume. Its abundant surface groups not only make it a good adsorbent material, but also make it used as a composite material with nanomaterials. Support material for structural materials. [0003] In order to obtain materials with high optoelectronic properties, various materials are being developed in full swing, especially graphene nanoparticle composite materials. Graphene nanoparticle composites have unique properties for opt...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30H01G11/24B82Y30/00
CPCY02E60/13H01G11/30H01G11/24H01G11/36H01G11/86
Inventor 欧宝立李政峰刘俊成
Owner HUNAN UNIV OF SCI & TECH
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