Graphene quantum dot/carbon nanotube/PEDOT:PSS composite film and preparation method thereof

A technology of graphene quantum dots and carbon nanotubes, which is applied in the field of composite materials, can solve the problems of high cost, heavy metal ion pollution, and toxic elements, and achieve low cost, improved thermoelectric conversion, and low price.

Active Publication Date: 2017-06-09
TIANJIN RES INST FOR ADVANCED EQUIP TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, traditional inorganic thermoelectric materials have disadvantages such as high cost, containing toxic elements, and polluting the environment with heavy metal ions.

Method used

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  • Graphene quantum dot/carbon nanotube/PEDOT:PSS composite film and preparation method thereof
  • Graphene quantum dot/carbon nanotube/PEDOT:PSS composite film and preparation method thereof

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preparation example Construction

[0030] A kind of preparation method of graphene quantum dot / carbon nanotube / PEDOT:PSS conductive film mainly comprises the following steps:

[0031] Step 1): Mix according to the mass ratio of graphene quantum dots, water, ethylene glycol (EG) and dimethyl sulfoxide (DMSO) mixed solution at 25-75:2:1, and perform ultrasonic dispersion to obtain uniformly dispersed graphite ene quantum dot solution;

[0032] Step 2): In the graphene quantum dot solution, graphene quantum dots and carbon nanotubes are mixed in a mass ratio of 25 to 5:1, and ultrasonically dispersed to obtain a uniformly dispersed graphene quantum dot / carbon nanotube solution ;

[0033] Step 3): In the graphene quantum dot / carbon nanotube solution and PEDOT:PSS solution, the solid mass ratio of graphene quantum dot, carbon nanotube and PEDOT:PSS is (5~25): (1~10) : Mix in a ratio of 10, and after magnetic stirring, obtain a uniformly dispersed graphene quantum dot / carbon nanotube / PEDOT:PSS mixed solution;

[0...

Embodiment 1

[0049] Graphene quantum dot / carbon nanotube / PEDOT:PSS composite film preparation method, concrete steps are as follows:

[0050] Step 1): Add 25mg of graphene quantum dots to 2mL of deionized water, then add 1mL of a mixed solution of EG and DMSO (the volume ratio of EG and DMSO is 1:1), and then perform ultrasonic dispersion, the ultrasonic power is 80W, ultrasonic The time is 0.5h to obtain a uniformly dispersed graphene quantum dot solution;

[0051] Step 2): Add 5 mg of single-walled carbon nanotubes to the graphene quantum dot solution obtained in step 1), and then perform ultrasonic dispersion, the ultrasonic power is 80W, and the ultrasonic time is 0.5h to obtain uniformly dispersed graphene quantum dots / carbon nanotube solution;

[0052] Step 3): 1g 5wt% of PEDOT:PSS solution is added to step 2) in the graphene quantum dot / carbon nanotube solution obtained, after carrying out magnetic stirring 3d, obtain the graphene quantum dot / carbon nanotube / PEDOT uniformly dispers...

Embodiment 2

[0057] Graphene quantum dot / carbon nanotube / PEDOT:PSS composite film preparation method, concrete steps are as follows:

[0058] Step 1): Add 25 mg of graphene quantum dots to 2 mL of deionized water, then add 1 mL of a mixed solution of EG and DMSO (the volume ratio of EG and DMSO is 1:2), and then carry out ultrasonic dispersion. The ultrasonic power is 100 W, and the ultrasonic time is For 1h, obtain a uniformly dispersed graphene quantum dot solution;

[0059] Step 2): Add 15 mg of single-walled carbon nanotubes to the graphene quantum dot solution obtained in step 1), and then perform ultrasonic dispersion, the ultrasonic power is 100W, and the ultrasonic time is 1h to obtain uniformly dispersed graphene quantum dots / carbon nano tube solution;

[0060] Step 3): 1g 5wt% of PEDOT:PSS solution is added to step 2) in the graphene quantum dot / carbon nanotube solution obtained, after carrying out magnetic stirring 3d, obtain the graphene quantum dot / carbon nanotube / PEDOT unifo...

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Abstract

The invention discloses a graphene quantum dot / carbon nanotube / PEDOT:PSS composite film and a preparation method thereof. The preparation method includes blending graphene quantum dots and carbon nanotubes in water sufficiently to form a graphene quantum dot / carbon nanotube hybrid, and dispersing the hybrid to an electroconductive polymer PEDOT:PSS to form the graphene quantum dot / carbon nanotube / PEDOT:PSS composite film. The graphene quantum dot / carbon nanotube / PEDOT:PSS composite film and the preparation method thereof have the advantages that both the graphene quantum dots and the carbon nanotubes structurally comprise large delocalized pi-bonds, a graphene quantum dot layer is modified on the wall of each of the carbon nanotubes through pi-pi conjugation, and accordingly excellent water solubility is achieved; the graphene quantum dot / carbon nanotube hybrid is evenly dispersed into a PEDOT:PSS water solution through uniform dispersity of the graphene quantum dots and the PEDOT:PSS in water, and the graphene quantum dots, the carbon nanotubes and PEDOT:PSS are combined together uniformly and effectively with the aid of pi-pi interaction between the graphene quantum dots and PEDOT, so that the graphene quantum dot / carbon nanotube / PEDOT:PSS composite film is formed. The graphene quantum dot / carbon nanotube / PEDOT:PSS composite film is excellent in electroconductivity, high in Seebeck coefficient and low in heat conduction coefficient.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a graphene quantum dot / carbon nanotube / PEDOT:PSS composite film and a preparation method thereof. Background technique [0002] Graphene quantum dots not only have excellent thermal, electrical, and magnetic properties similar to graphene, but also have significant quantum confinement and boundary effects, endowing graphene quantum dots with more unique physical properties. For example, the strong fluorescence effect of graphene quantum dots can have potential application value in the field of biomarkers or biodetection; high carrier mobility and wide band gap energy have great application prospects in solar cells. Moreover, recent theoretical studies have shown that cutting graphene into graphene nanoribbons, or graphene quantum dots, can greatly improve the thermoelectric conversion efficiency. However, in the experiment, the improvement of the thermoelectric efficiency of g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L65/00C08L25/18C08K3/04C08K7/24C08J5/18
CPCC08J5/18C08J2325/18C08J2365/00C08K2201/001C08K2201/003C08K2201/006C08K2201/011C08L25/18C08L65/00C08L2203/16C08K3/04C08K7/24
Inventor 杜飞鹏曹南南程相乐李晶晶张云飞吴艳光
Owner TIANJIN RES INST FOR ADVANCED EQUIP TSINGHUA UNIV
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