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Preparation method of two-dimensional nano-graphene

A two-dimensional nanometer and graphene technology, applied in the direction of graphene, nanocarbon, nanotechnology, etc., can solve the problems of complex preparation process and high price, and achieve the effect of simple process and simple source

Active Publication Date: 2013-02-06
HUAWEI TEHCHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of preparation method of two-dimensional nano-graphene in order to overcome the deficiencies such as complex preparation process and high price in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022]Mix acrylic acid and water at a ratio of 1:2 by volume, and add the hydrotalcite particles passing through a 20-mesh sieve to the acrylic acid solution according to the amount of 5 mmol of acrylic acid per gram of commercially available magnesium aluminum hydrotalcite, and stir at a constant temperature of 70°C 6 h, aged for 24 h, separated the particles, washed 3 times with deionized water, and added the particles to a 10% isopropanol solution to adjust the organic matter content between the hydrotalcite layers. Each gram of hydrotalcite corresponds to isopropanol Propanol solution was 10 ml, stirred for 3 h, then ammonium persulfate was added to initiate the polymerization of acrylic acid, the amount of ammonium persulfate per gram of hydrotalcite was 15 mmol, heated to 90°C, reacted for 10 h, washed 3 times with deionized water , dried at 90°C, ground, and passed through a 40-mesh sieve to obtain powder; put the obtained powder into a vacuum tube furnace, heat to 700°C...

Embodiment 2

[0024] Mix acrylic acid and water at a ratio of 1:1 by volume. According to the amount of 3 mmol of acrylic acid per gram of commercially available zinc-aluminum hydrotalcite, add hydrotalcite particles that pass through a 50-mesh sieve into the acrylic acid solution, and keep the temperature at 60°C Stir for 5 h, age for 12 h, then separate the particles, wash them twice with deionized water, add the particles to a 5% isopropanol solution to adjust the organic matter content between the hydrotalcite layers, and each gram of hydrotalcite corresponds to The isopropanol solution is 5 ml, stirred for 2 hours, then ammonium persulfate is added to initiate the polymerization of acrylic acid, the amount of ammonium persulfate per gram of hydrotalcite is 5 mmol, heated to 60°C, reacted for 8 hours, washed twice with deionized water , dried at 70°C, ground, and passed through a 20-mesh sieve to obtain powder; put the obtained powder into a vacuum tube furnace, heat to 600°C under vacuu...

Embodiment 3

[0026] Firstly, the magnesium-aluminum hydrotalcite was synthesized according to the literature (hydrothermal synthesis of magnesium-aluminum hydrotalcite, Applied Chemistry, 2001, 18, 70-72); the hydrotalcite was passed through a 40-mesh sieve for later use.

[0027] Mix acrylic acid and water at a ratio of 1:2 by volume, and add the prepared hydrotalcite particles into the acrylic acid solution according to the amount of 4 mmol of acrylic acid per gram of hydrotalcite, stir at a constant temperature of 65°C for 6 h, and age for 18 h, then separate the particles, wash them with deionized water for 2 to 3 times, and add the particles to an 8% isopropanol solution to adjust the organic matter content between the hydrotalcite layers. Each gram of hydrotalcite corresponds to the isopropanol solution to 8 ml, stirred for 3 h, then added ammonium persulfate to initiate the polymerization of acrylic acid, the amount of ammonium persulfate per gram of hydrotalcite was 10 mmol, heated ...

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Abstract

The invention discloses a preparation method of two-dimensional nano-graphene. The method includes: mixing acrylic acid and water according to the volume ratio of 1:1-1:2, adding hydrotalcite particles passing a sieve 20-50 in mesh into acrylic acid solution according to the quantity that each gram of hydrotalcite corresponds to 3-5mmol of the acrylic acid, stirring at the temperature of 60-70 DEG C, ageing, separating particles, adding the particles into isopropanol solution, adding ammonium persulfate, heating to 60-90 DEG C for reaction for 8-10h, drying at the temperature of 70-90 DEG C, grinding, and passing a sieve 20-40 in mesh to obtain powder; heating the power to 600-700 DEG C in vacuum, calcining for 2-4h, adding calcined powder into hydrochloric acid solution 20%-40% in concentration, stirring under the protection of nitrogen, precipitating, separating and drying; and heating an obtained product to 2000-2500 DEG C in vacuum, subjecting the product to heat treatment for 3-6h and cooling so that the two-dimensional nano-graphene is obtained. The method is simple in material sources and simple and mild in process.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a preparation method of two-dimensional nanometer graphene. Background technique [0002] In the research and development of new materials, dimensionality has become an important parameter for modulating the structure and properties of matter. When the material changes from three-dimensional structure to two-dimensional, one-dimensional and zero-dimensional, its geometric structure and physical and chemical properties will change significantly. Two-dimensional nanomaterials have been widely used in many fields such as solid-state nanodevices, sensing and functional thin films due to their anisotropy and unique optoelectronic properties. In particular, highly oriented graphitic carbon 001 has a unique resistance to radiation, which is expected to be used in medical low-energy neutron radiation-resistant materials, X-Ray monochromator radiation-resista...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y40/00C01B32/19
Inventor 马建锋邹静李定龙杨彦
Owner HUAWEI TEHCHNOLOGIES CO LTD
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