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Method for preparing graphene nano-belt through sealed oxidation

A graphene nanobelt, oxidation method, applied in nanotechnology, pressure vessels used in chemical processes, pressure vessels/vacuum vessels, etc., can solve the problems of less product structural defects, time-consuming and energy-consuming, cumbersome steps, etc. Good shape, shortened reaction time and simple method

Inactive Publication Date: 2015-11-04
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is to provide a method for quickly and efficiently preparing high-quality graphene nanoribbons, which has fewer steps, shorter time consumption, fewer product structural defects, and high yield, which solves the cumbersome steps in conventional preparation methods , Time-consuming and energy-consuming, low yield and other disadvantages

Method used

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  • Method for preparing graphene nano-belt through sealed oxidation

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Take 375mg of potassium permanganate, 75mg of multi-walled carbon nanotubes (OD>50nm), and 75mL of 98% sulfuric acid into a 100mL polytetrafluoroethylene-lined reactor in turn, shake to make the dispersion even, seal it, and heat it to 70°C for 3 hours at a constant temperature; Cool to room temperature, add ice cubes (200mL deionized water to freeze), add 5mL of 30% hydrogen peroxide while stirring, wash with 1 liter of 1M hydrochloric acid, and finally filter and wash with deionized water until neutral; ultrasonic 20min, natural at room temperature After drying, 90.5 mg of graphene nanoribbons were obtained with a yield of 120.67%.

[0033] figure 1 It is a TEM image of the graphene nanobelt prepared in Example 1 of the present invention. from figure 1 It can be seen that graphene nanoribbons have been successfully prepared, and the prepared graphene nanoribbons have uniform morphology. The graphene nanoribbons prepared in this example have a width of 80-90nm and a...

Embodiment 2

[0035] Take 375mg of potassium permanganate, 75mg of multi-walled carbon nanotubes (OD>50nm), and 75mL of 98% sulfuric acid into a 100mL polytetrafluoroethylene-lined reactor in turn, shake to make the dispersion even, airtight, and heat to 60°C for 3 hours. Cool to room temperature, add ice cubes (200mL deionized water to freeze), add 5mL of 30% hydrogen peroxide while stirring, filter and wash with deionized water until neutral, and dry naturally at room temperature to obtain graphene nanobelts.

[0036] figure 2 It is a TEM image of the graphene nanobelt prepared in Example 2 of the present invention. The graphene nanobelts made in this example have a bandwidth of 70-80nm and a length>1um.

Embodiment 3

[0038] Take 375mg of potassium permanganate, 75mg of multi-walled carbon nanotubes (OD>50nm), and 75mL of 98% sulfuric acid into a 100mL polytetrafluoroethylene-lined reactor in turn, shake to make the dispersion even, airtight, and heat to 60°C for 3 hours; cool To room temperature, add ice cubes (200mL deionized water to freeze), add 5mL of 30% hydrogen peroxide while stirring, filter and wash with deionized water until neutral; ultrasonic for 40min, and dry naturally at room temperature to obtain graphene nanobelts.

[0039] image 3 It is a TEM image of the graphene nanobelt prepared in Example 3 of the present invention. The graphene nanoribbon prepared in this example is 70-80nm, and the length is <1um.

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Abstract

The present invention discloses a method for preparing graphene nano-belt through sealed oxidation. According to the method, multi-walled carbon nano-tubes, potassium permanganate and concentrated sulfuric acid are subjected to a pressurization oxidation reaction in a sealed polytetrafluoroethylene lining reaction kettle to improve the longitudinal multi-walled carbon nano-tube cutting efficiency so as to obtain the high quality graphene nano-belt. Compared with the conventional method, the method of the present invention has characteristics of less preparation steps, short reaction time, environmental protection, safety, and easy large-scale production achieving. The graphene nano-belt prepared through the method of the present invention has advantages of less structure defects, good water solubility, high yield, and the like.

Description

technical field [0001] The invention relates to a method for preparing graphene nanobelts, in particular to a method for rapidly preparing graphene nanobelts by using a closed pressurized oxidation reaction in a polytetrafluoroethylene-lined reactor. technical background [0002] Graphene is a new two-dimensional material with a single layer of carbon atoms in a hexagonal honeycomb network structure. The 2010 Nobel Prize in Physics was awarded to the discoverers of graphene, A.K.Geim and K.S. Novoselov, which inspired scholars to study graphene. However, the two-dimensional planar structure of graphene is prone to structural defects such as wrinkles and undulations, which affects its performance in different fields of application. Graphene nanoribbons (graphene nanoribbons), as a graphene material with special morphology, not only inherits many excellent properties of graphene, such as large specific surface area, high Young's modulus and tensile strength, good thermal cond...

Claims

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Application Information

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IPC IPC(8): C01B31/04B01J3/03B82Y40/00
Inventor 江桂斌刘倩程梦婷王静
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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