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Flexible self-supporting metal oxide / graphene nano-composite membrane and preparing method and application thereof

A nanocomposite and graphene technology, applied in the field of nanomaterials, can solve the problems of large particle size and uneven distribution of metal oxide particles, and achieve the effects of large equivalence ratio range, abundant raw materials, and simple methods

Inactive Publication Date: 2017-06-20
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is simple and scalable, and solves the problem of uneven distribution and excessive particle size of metal oxide particles on graphene

Method used

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  • Flexible self-supporting metal oxide / graphene nano-composite membrane and preparing method and application thereof
  • Flexible self-supporting metal oxide / graphene nano-composite membrane and preparing method and application thereof
  • Flexible self-supporting metal oxide / graphene nano-composite membrane and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8

[0039] In Examples 1-8:

[0040] The graphene oxide is prepared by the improved Hummers method.

Embodiment 1

[0042] 1. Preparation:

[0043] S1. Measure 168ml of absolute ethanol in a 250ml beaker, and slowly add 9.4ml of GO solution with a concentration of 3.2mg / ml into the beaker under magnetic stirring; then measure 0.9ml of TiCl with a concentration of 0.55mol / L 4 / Anhydrous ethanol solution, slowly drop into the beaker; measure 2.6ml of deionized water dropwise into the beaker, stir magnetically for 10min to obtain a uniform dispersion;

[0044] S2. Transfer the dispersion to a hydrothermal reactor and react at 100°C for 2 hours;

[0045] S3. Suction filter the reacted product into a film, wash with absolute ethanol and deionized water, and evaporate and dry at 25°C for 24h to obtain TiO 2 / Graphene nanocomposite filter membrane;

[0046] S4. Dissolve the filter membrane with methanol to obtain TiO 2 / Graphene nanocomposite film.

[0047] 2. Performance analysis:

[0048] tested, figure 1 and figure 2 TiO 2 / Photographs of graphene nanocomposite membranes tiled and ben...

Embodiment 2

[0050] 1. Preparation:

[0051] S1. Measure 168ml of methanol solution in a 250ml beaker, and slowly add 9.4ml of GO solution with a concentration of 3.2mg / ml dropwise into the beaker under magnetic stirring; then measure 0.9ml of SnCl with a concentration of 0.5mol / L 4 / methanol solution, slowly drop into the beaker; measure 4ml of deionized water dropwise into the beaker, stir magnetically for 10min to obtain a uniform dispersion;

[0052] S2. Transfer the dispersion to a hydrothermal reactor for 2 hours at 100°C;

[0053] S3. Suction filter the reacted product into a film, wash with deionized water, and evaporate and dry at 30°C for 20 hours to obtain SnO 2 / Graphene nanocomposite filter membrane;

[0054] S4. Dissolve the filter membrane with acetone to obtain SnO 2 / Graphene nanocomposite film.

[0055] 2. Performance analysis: After testing, SnO 2 / SnO in graphene nanocomposite film 2 The nanoparticles are uniformly distributed, and the particle size is 3-4nm. Th...

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Abstract

The invention discloses a method for preparing a flexible self-supporting metal oxide / graphene nano-composite membrane. The method for preparing the flexible self-supporting metal oxide / graphene nano-composite membrane comprises the following steps: adding the graphene oxide to an organic solvent dissolved in metal salts, and transferring to a hydrothermal reactor after being dispersed evenly to perform hydrothermal reaction at 100 to 140 degrees centigrade for 0.5 to 12 hours; preparing the metal oxide / graphene nano-composite filter membrane through vacuum filtration to form a membrane, washing, evaporating and drying. The method disclosed by the invention has the advantages of simple method, low cost and easy to scale. According to the invention, the metal oxide in the resultant composite membrane is grown uniformly in situ on the surface of the graphene; the average particle size is 1 to 5nm; and the flexible self-supporting metal oxide / graphene nano-composite membrane has a flexible and self-supporting structure, can be bent freely, and is suitable for flexible electronic devices; and if the flexible self-supporting metal oxide / graphene nano-composite membrane is used in electrochemical storage fields such as lithium ion batteries and supercapacitors, the high electrochemical performances such as high specific capacity, ultra-high rate performance and high cycle stability can be realized.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and more specifically relates to a flexible self-supporting metal oxide / graphene nanocomposite film and its preparation method and application. Background technique [0002] Graphene is a two-dimensional carbon nanomaterial composed of a single layer of carbon atoms, in which the carbon atoms are represented by SP 2 The hybrid form is closely arranged, and the electron movement rate of graphene can reach 1 / 300 of the speed of light. It can be applied to lithium-ion batteries and electric double-layer capacitors, and can greatly improve the performance of chemical power sources. It has potential applications in energy storage. value. However, graphene has a strong van der Waals force and is prone to agglomeration, which will have a great impact on its application. In order to obtain a uniformly dispersed graphene solution, it is necessary to properly functionalize its surface. Among them, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/13H01G11/36C01B32/184C01B32/182B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00H01G11/36H01M4/13H01M4/366Y02E60/10Y02E60/13
Inventor 李运勇黄莹欧长志朱俊陆张海燕
Owner GUANGDONG UNIV OF TECH
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