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Stripping method of stratified materials

A layered material and multi-layer sheet technology, applied in the direction of molybdenum sulfide, etc., can solve the problems of high environmental pollution, low efficiency, and small output, and achieve the effects of environmental friendliness, simple process, and low cost

Active Publication Date: 2015-10-14
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for exfoliating layered materials to solve the problems of low efficiency, low output, high cost, and high environmental pollution in the preparation of two-dimensional crystal materials in the prior art.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] According to the mass percentage, weigh 30% of the layered material, 0.2% of the organic intercalating agent, and the rest is water, stir and mix the layered material, the organic intercalating agent and the solvent evenly to obtain a slurry, and put the slurry into the airtight In the container, static immersion for 2h; the layered material is graphite; the organic intercalating agent is ammonium formate. The obtained slurry was heated at 50° C. under constant stirring for 5 h, and the slurry was filtered, washed and dried to obtain a filter cake; The rest is water, put it into a closed container, mix it evenly to make a slurry, and immerse it statically for 5 hours; the inorganic intercalating agent is NH 4 Cl. The airtight container containing the slurry was heated for 8 hours at 50°C, cooled to room temperature, and heated and cooled 3 times; the slurry was filtered and washed 3 times to obtain a secondary filter cake and a filtrate; the secondary filter cake was a...

Embodiment 2

[0057] According to the mass percentage, weigh 70% of the layered material, 5% of the organic intercalating agent, and the rest are methanol, stir and mix the layered material, the organic intercalating agent and the solvent evenly to obtain a slurry, put the slurry into a closed In the container, static immersion for 48h; the layered material is BN; the organic intercalating agent is ammonium phthalate. The obtained slurry was heated at 200 ° C under constant stirring for 5 hours, and the slurry was filtered, washed and dried to obtain a filter cake, and the organic intercalating agent in the filtrate was recovered or recycled; according to the mass percentage, 50% of the The filter cake, 30% of the inorganic intercalating agent, and the rest are methanol, put into a closed container, mixed evenly to make a slurry, and immersed for 32 hours; the inorganic intercalating agent is NH 4 NO 3 . The airtight container containing the slurry was heated for 2 hours at 200°C, cooled ...

Embodiment 3

[0059] According to the mass percentage, weigh 50% of the layered material, 3% of the organic intercalating agent, and the rest are ethanol, stir and mix the layered material, the organic intercalating agent and the solvent evenly to obtain a slurry, put the slurry into a closed In the container, static immersion for 24h; the layered material is montmorillonite; the organic intercalating agent is phthalamide. The obtained slurry was heated at 100 ° C for 5 hours under constant stirring, and the slurry was filtered, washed and dried to obtain a filter cake; The rest is ethanol, put into a closed container, mixed evenly to make a slurry, and immersed for 12 hours; the inorganic intercalating agent is NaNO 3 . The airtight container containing the slurry was heated at 100°C for 5 hours, cooled to room temperature, and heated and cooled repeatedly for 4 times; the slurry was filtered and washed 4 times to obtain a secondary filter cake and filtrate; the secondary filter cake was ...

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PUM

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Abstract

The invention discloses a stripping method of stratified materials. The stripping method comprises the following steps of: weighing 30-70% of stratified materials, 0.2-5% of an organic intercalation agent, and the balance of a solvent, and mixing and stirring the weighed stratified materials, the weighed organic intercalation agent and the weighed solvent so as to obtain paste; placing the paste in a closed container, and performing static steeping; heating the steeped paste under the condition of continuously stirring, filtering the paste, washing the filtered paste, drying the washed paste so as to obtain a filter cake; placing 10-50% of filter cake, 0.5-30% of an inorganic intercalation agent, and the balance of a solvent into a closed container, uniformly mixing the filter cake, the inorganic intercalation agent and the solvent so as to obtain paste; performing static steeping; heating the closed container with the paste under the condition of 50-200 DEG C for 2-8h; cooling the heated closed container with the paste to room temperature; performing repeated heating and cooling; performing filtering; performing cleaning so as to obtain a secondary filter cake and a filtrate agent; adding the secondary filter cake and the filtrate agent in the solvent for ultrasonic stripping so as to obtain a dispersion liquid; filtering the dispersion liquid; washing the filtered dispersion liquid with deionized water; and performing vacuum drying so as to obtain the stratified materials. The stripping method disclosed by the invention solves the problems that the prior art for preparing the two dimensional crystal materials is low in efficiency, small in yield, high in environmental pollution, and the like. Defects and impurities are not led in the two-dimensional crystal materials.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and relates to a layered material peeling method. Background technique [0002] Two-dimensional atomic crystals represented by graphene are a new class of materials with rich and diverse systems, unique structures, and rich and novel physical and chemical properties. They have broad application prospects in the fields of electronics, information, and energy. In recent years, a series of important progresses have been made in the research of two-dimensional atomic crystal materials, especially graphene, with new achievements and discoveries emerging one after another. The large-scale, low-cost, and controllable synthesis and preparation of novel two-dimensional atomic crystal material systems are of great significance. [0003] A layered material is a three-dimensional structure formed by the accumulation of two-dimensional flakes by weak force. Its typical representative is grap...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01G39/06
Inventor 徐伟箭欧恩才张杰何莉潘武
Owner HUNAN UNIV
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