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Preparation method of graphene oxide nano roll and composite material thereof

A composite material and graphene technology, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of cumbersome process, complex process, low efficiency, etc., and achieve the effect of avoiding freeze-drying and accelerating gasification speed

Active Publication Date: 2020-06-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims to solve the disadvantages of cumbersome process, low efficiency, high energy consumption, complex process and single product in the existing carbon nano-roll and composite material preparation methods.

Method used

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  • Preparation method of graphene oxide nano roll and composite material thereof
  • Preparation method of graphene oxide nano roll and composite material thereof
  • Preparation method of graphene oxide nano roll and composite material thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: the preparation method of one-dimensional pure graphene oxide nanovolume in the present embodiment is carried out according to the following steps:

[0035] Step 1: Graphene oxide was prepared by liquid phase exfoliation method (Hummers), centrifugally washed until the pH value of the solution was neutral, and then freeze-dried at -10°C to obtain a graphene oxide sponge, which was added to deionized water and ultrasonically dispersed for 60 minutes , to obtain a 0.01mg / mL graphene oxide dispersion;

[0036] Step 2. Then take 1 ml and drop it on a clean 3cm×3cm silicon wafer, and then place it horizontally in a device connected to a vacuum pump. Under normal temperature conditions, vacuumize to a vacuum of 10Pa, and process at a vacuum of 10Pa. After 10 minutes, the graphene oxide nano-volumes are obtained, and the curls are uniform.

[0037] In this embodiment, graphene oxide is prepared by using the existing liquid phase exfoliation method (Hummers), spe...

Embodiment 2

[0040] Embodiment 2: the preparation method of three-dimensional pure graphene oxide nanovolume in the present embodiment is carried out according to the following steps:

[0041] Step 1: Graphene oxide was prepared by liquid phase exfoliation method (Hummers), centrifugally washed until the pH value of the solution was neutral, and then freeze-dried at -10°C to obtain a graphene oxide sponge, which was added to deionized water and ultrasonically dispersed for 60 minutes , to obtain a 2mg / mL graphene oxide dispersion;

[0042] Step 2. Then take 1 ml and drop it on a clean 3cm×3cm glass, and then place it horizontally in a device connected to a vacuum pump. Under normal temperature, evacuate to a vacuum of 10Pa, and treat it for 10min at a vacuum of 10Pa. , that is, graphene oxide nanovolumes are obtained, which are uniformly curled and can form a three-dimensional network structure.

[0043] Graphene oxide is prepared according to the method in Example 1 in this example.

[00...

Embodiment 3

[0045] Embodiment 3: the preparation method of a kind of graphene oxide-carbon nanotube nano volume composite material in the present embodiment is to carry out according to the following steps:

[0046] Step 1. Prepare graphene oxide by liquid phase exfoliation (Hummers), centrifuge and wash until the pH of the solution is neutral, then freeze-dry at -10°C to obtain graphene oxide sponge, add deionized water, and ultrasonically disperse for 30 minutes , to obtain a 1mg / mL graphene oxide dispersion;

[0047] Step 2. Add 150mL of concentrated sulfuric acid and 50mL of concentrated nitric acid into 2g of carbon nanotubes, condense and reflux at 55°C for 3h, wash with deionized water until the pH is neutral, and freeze at -10°C Dry, add deionized water, and ultrasonically disperse for 30 minutes to obtain a 0.5 mg / mL carbon nanotube dispersion;

[0048] Step 3, after mixing 5mL of the graphene oxide dispersion obtained in step 1 with 2mL of the carbon nanotube dispersion obtaine...

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Abstract

The invention discloses a preparation method of a graphene oxide nano roll and a composite material thereof, which belong to the field of preparation of carbon nano materials. According to the invention, the defects of complex process, low efficiency, high energy consumption, complex process, single product and the like of the existing preparation method of the carbon nano roll and the composite material are overcome. The method comprises the following steps: ultrasonically dispersing graphene oxide sponge prepared by adopting a liquid phase stripping method and freeze-drying in deionized water; dissolving graphene oxide in water, dropwise adding to a clean substrate, horizontally placing in equipment connected with a vacuum pump, and vacuumizing at normal temperature to quickly evaporatewater, thereby obtaining the graphene oxide nano roll; and obtaining a one-dimensional or three-dimensional network structure by controlling the concentration of the graphene oxide; preparing the GO-carbon tube nanoscroll or the GO-carbon tube-metal salt nanoscroll composite material by selectively adding acidified carbon nanotubes and various metal salts. The method is low in cost, easy to operate, high in safety and convenient for large-scale preparation, popularization and application of various products.

Description

technical field [0001] The invention belongs to the field of carbon nanomaterial preparation, and specifically relates to a preparation method of graphene oxide nano-rolls and a preparation method of graphene oxide nano-roll composite materials. Background technique [0002] Graphene is a sp 2 Two-dimensional nanomaterials composed of hybrid carbon atoms present a hexagonal honeycomb structure, which has excellent performance and broad application prospects. At present, graphene sheets, graphene fibers, graphene hydrogels or aerogels, graphene nanoscrolls and other materials can be prepared by various methods. Among them, the graphene oxide nanoscroll composite material is composed of two-dimensional graphene oxide nanosheets coated with other nano-substances and rolled up. It is a carbon nanomaterial with an open structure. It is used in energy conversion and storage, electronic devices, quantum input It has broad application prospects in transportation, flexible material...

Claims

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Application Information

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IPC IPC(8): C01B32/198C01B32/168C01D15/06C01D15/10C01G9/04C01D5/00C01F11/24B82Y30/00
CPCB82Y30/00C01D5/00C01D15/06C01D15/10C01F11/24C01G9/04C01B32/168C01B32/198Y02P20/10
Inventor 吴晓宏姚远秦伟卢松涛李杨
Owner HARBIN INST OF TECH
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