Method for preparing two-dimensional inorganic nanomaterial by mechanical force intercalation stripping

A two-dimensional nanomaterial, layer peeling technology, applied in vanadium oxide, tungsten oxide/tungsten hydroxide, manganese oxide/manganese hydroxide and other directions, to achieve the effect of shortened preparation time, high peeling efficiency and low surface tension

Inactive Publication Date: 2019-01-22
深圳烯材科技有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the existing two-dimensional material exfoliation preparation methods, the object of the present invention is to provide a method for preparing inorganic two-dimensional nanomaterials by mechanical intercalation exfoliation, using mixed metal halides (such as: lithium fluoride, fluoride Two or more of sodium, potassium fluoride, lithium chloride, sodium chloride, potassium chloride, etc.) are the intercalation stripping medium, and the purified layered mineral material is subjected to solid-phase high-energy ball milling treatment together with the intercalation stripping medium, After the ball-milled mixed powder is washed with water to remove the salt, the three-dimensional layered materials can be efficiently peeled off to prepare their corresponding two-dimensional sheet material dispersions, and the two-dimensional materials can be obtained after drying the dispersions of powder products

Method used

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  • Method for preparing two-dimensional inorganic nanomaterial by mechanical force intercalation stripping
  • Method for preparing two-dimensional inorganic nanomaterial by mechanical force intercalation stripping
  • Method for preparing two-dimensional inorganic nanomaterial by mechanical force intercalation stripping

Examples

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Effect test

Embodiment 1

[0035] In this example, a 32-mesh artificially synthesized hexagonal boron nitride powder was used as a raw material to prepare two-dimensional boron nitride nanosheets. Mix lithium fluoride / sodium fluoride / potassium fluoride in a mass ratio of 3 / 1 / 6 to obtain a composite eutectic molten salt powder with a melting point of about 450°C. The hexagonal boron nitride powder and composite eutectic The molten salt powder is mixed evenly according to the mass ratio of 1:4, and then added to the stainless steel tank of the high-energy ball mill, and then stainless steel grinding balls with a diameter of 5mm are added, and the mass ratio of the grinding balls to the powder is 15:1. After sealing the tank body, carry out high-energy ball milling treatment, and the treatment time is 2 hours. After the ball milling process, spray water to the ball mill tank to cool to normal temperature. Open the ball mill tank, use a vibrating sieving machine to separate the ball powder, collect the obt...

Embodiment 2

[0037] In this example, 32-mesh natural molybdenum disulfide powder was used as raw material to prepare two-dimensional molybdenum sulfide nanosheets. Mix lithium fluoride / barium fluoride / potassium fluoride / sodium fluoride in a mass ratio of 45 / 2 / 41 / 12 to obtain a composite eutectic molten salt powder with a melting point of about 430°C. Molybdenum disulfide powder The body and the composite eutectic molten salt powder are mixed evenly according to the mass ratio of 1:6, then added to the agate tank of the high-energy ball mill, and then added with agate balls with a diameter of 10mm, the mass ratio of the balls to the powder is 8:1 . After sealing the tank body, carry out high-energy ball milling treatment, and the treatment time is 3 hours. After the ball milling process, spray water to the ball mill tank to cool to normal temperature. Open the ball mill tank, use a vibrating sieving machine to separate the ball powder, collect the resulting mixed powder, add deionized wat...

Embodiment 3

[0039]In this example, 32-mesh natural vermiculite powder was used as raw material to prepare two-dimensional silicate nanosheets. Mix lithium chloride / potassium fluoride in a mass ratio of 1 / 1 to obtain a composite eutectic molten salt powder with a melting point of about 490°C. Mix natural vermiculite powder and composite eutectic molten salt powder at a ratio of 1:8 After the mass ratio is mixed evenly, add it to the alumina tank of the high-energy ball mill, and then add alumina grinding balls with a diameter of 5mm. The mass ratio of the grinding balls to the powder is 6:1. After sealing the tank body, carry out high-energy ball milling treatment, and the treatment time is 1 hour. After the ball milling process, spray water to the ball mill tank to cool to normal temperature. Open the ball mill tank, use a vibrating sieving machine to separate the ball powder, collect the resulting mixed powder, add deionized water, and use a microporous filter membrane to repeatedly fil...

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Abstract

The invention relates to the technical field of inorganic nanomaterial preparation, and in particular, relates to a method for preparing a two-dimensional inorganic flaky nanomaterial by mechanical force intercalation stripping of a three-dimensional inorganic layered crystal material. With mixed metal halide as an intercalation and stripping medium, the purified layered inorganic crystal materialand the intercalation and stripping medium are subjected to solid-phase high-energy ball milling treatment together, mixed powder after ball milling treatment is washed with water to remove the intercalation and stripping medium, the three-dimensional layered material can be highly efficiently made into the corresponding two-dimensional flaky material. The method has universality for stripping ofthe inorganic non-metallic layered crystal material, has the advantages of simple preparation process, short production cycle, and high yield of the two-dimensional material, does not affect a crystal structure of the two-dimensional material, and the intercalation and stripping medium can be reused without causing environmental pollution.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic nanomaterials, in particular to a method for preparing two-dimensional inorganic sheet-like nanomaterials by using mechanical force intercalation to peel off three-dimensional inorganic layered crystal materials. Background technique [0002] Two-dimensional nanomaterials refer to flake-like crystal materials whose thickness is on the order of single or several atomic layers, usually less than 10nm in number. The most typical two-dimensional material is graphene, the thickness of its single layer is about 0.4nm, and the sheet size can reach several microns or more. In addition to graphene, hundreds of two-dimensional nanomaterials with similar shape characteristics can be prepared by using natural or synthetic layered crystal materials, such as: boron nitride, molybdenum sulfide, tantalum sulfide, gallium selenide, selenium Molybdenum chloride, platinum telluride, alumina, niobiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/064C01B11/00C01B11/06C01B19/00C01B21/06C01B25/02C01B32/19C01B32/949C01B33/20C01B33/22C01B33/26C01F17/00C01G9/00C01G21/16C01G23/00C01G23/04C01G23/08C01G25/00C01G29/00C01G31/02C01G33/00C01G35/00C01G39/04C01G39/06C01G41/00C01G41/02C01G45/00C01G45/02C01G51/04C01G53/00C01G53/04B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B11/00C01B11/06C01B19/007C01B21/0605C01B21/0648C01B25/02C01B33/20C01B33/22C01B33/26C01G9/006C01G21/16C01G23/006C01G23/007C01G23/04C01G23/08C01G25/00C01G29/00C01G31/02C01G33/00C01G35/00C01G39/04C01G39/06C01G41/00C01G41/02C01G45/006C01G45/02C01G51/04C01G53/006C01G53/04C01P2004/20C01B32/19C01B32/949C01F17/206
Inventor 刘永生
Owner 深圳烯材科技有限公司
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