Porous graphene preparation method

A technology of porous graphene and organic matter, which is applied in the field of nanomaterial preparation, can solve the problems of heavy metals participating in the reaction, complicated preparation methods, environmental pollution, etc., and achieves the effects of rich species, uniform pore size distribution, and low cost.

Inactive Publication Date: 2016-02-17
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The advantage of this method is: porous graphene can be produced at low cost and in large quantities, and the disadvantage is: the preparation method is complicated and heavy metals are involved in the reaction during the preparation process (Chinese Published Invention Application CN102115069A)
The porous graphene can reduce the mass transfer resistance between graphene sheets, but the preparation method is complicated and an organic solvent that pollutes the environment needs to be added during the preparation process
It can be seen that the preparation method of graphene in the prior art is complicated to operate and easily causes environmental pollution

Method used

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Experimental program
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Effect test

Embodiment 1

[0023] (1) take by weighing the glucose of 5g and the ammonium chloride of 0.5g respectively;

[0024] (2) Pour glucose and ammonium chloride into a pre-cleaned beaker, and mix uniformly to obtain a mixture of the two;

[0025] (3) The above mixture was transferred to a ceramic cup and put into a tube furnace, and the tube furnace was heated up to 1400 °C at a rate of 4 °C / min under a nitrogen atmosphere to finally prepare porous graphene.

[0026] Carry out SEM electron microscope scanning analysis to the porous graphene that makes, its result is as follows figure 1 and figure 2 shown, from figure 1 In (a) and (b), it can be seen that the porous graphene pore structure prepared by this scheme is obvious, evenly distributed, and the pore size is uniform. By further zooming in and observing, as figure 2 It can be seen more clearly that the pore size is between 2-4 μm.

Embodiment 2

[0028] (1) Take by weighing 5g of glucose, 5g of calcium chloride and 4.4g of ammonium carbonate respectively

[0029] (2) Glucose, calcium chloride and ammonium carbonate are mixed uniformly to obtain a mixture;

[0030] (3) The above mixture was transferred to a ceramic cup and put into a tube furnace, and the tube furnace was heated to 900 °C at a rate of 4 °C / min under an argon atmosphere to finally prepare porous graphene.

Embodiment 3

[0032] (1) take by weighing the glucose of 1g, the ammonium chloride of 10g respectively;

[0033] (2) Glucose, graphene oxide and calcium carbonate are mixed uniformly to obtain a mixture;

[0034] (3) The above mixture was transferred to a ceramic cup and put into a tube furnace, and the tube furnace was heated up to 1400 °C at a rate of 4 °C / min under a nitrogen atmosphere to finally prepare porous graphene.

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Abstract

The present invention belongs to the technical field of nanometer materials, and discloses a novel porous graphene preparation method, which specifically comprises: (1) respectively weighing a proper amount of a carbon-hydrogen-oxygen-containing organic matter and an inorganic salt; (2) uniformly mixing the carbon-hydrogen-oxygen-containing organic matter and the inorganic salt to obtain a mixture; and (3) heating the mixture under an inert gas atmosphere to achieve a temperature of 900-1600 DEG C so as to finally prepare the porous graphene. According to the present invention, the obtained graphene material having the porous structure has characteristics of uniform pore size distribution and controllable pore size, and is widely used in the fields of catalysis, adsorption, ultracapacitors and the like; the carbon-hydrogen-oxygen-containing organic matter and the inorganic salt are adopted as the raw materials to prepare the graphene, such that the variety of the raw materials is rich, the sources are wide, the cost is low, and the method is suitable for mass production; and the high temperature firing process is used, the process is simple and is easy to operate, no substance harm on the environment is introduced or generated, and the advantages of safety and environmental protection are provided.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a new method for preparing porous graphene based on carbohydrates and ammonium inorganic salts. The preparation of porous graphene is convenient, convenient and energy-saving. Background technique [0002] Graphene has become a new material of widespread concern because of its excellent optical, electrical, mechanical, and biological properties. Single-layer graphite has a large specific surface area, excellent electrical and thermal conductivity, and low thermal expansion coefficient. In particular, its high conductivity, large specific surface properties and its monolayer two-dimensional nanoscale structural properties can be used as electrode materials in supercapacitors and lithium-ion batteries. Theoretical calculations show that graphene has a specific surface area as high as 2630cm2 / g (Science2009, 323, 610). Jiang et al. used graphene materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 曾文进赵春燕闵永刚苑春秋
Owner NANJING UNIV OF POSTS & TELECOMM
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