Preparation process of a two-dimensional al-o-cu-fe single crystal layer sheet material

A technology of al-o-cu-fe and flake materials, which is applied in the field of metal catalytic material preparation, can solve the problems of complex preparation methods, easy introduction of impurities, harsh conditions, etc., and achieve simple preparation process, strong process controllability, low cost effect

Inactive Publication Date: 2018-08-03
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above method can prepare two-dimensional materials, but there are the following problems: first, the preparation method itself is relatively complicated and the conditions are harsh; second, most of them require subsequent heat treatment; third, special precursor templates are required; Polycrystalline, it is not easy to form a monocrystalline layered structure that is beneficial to catalysis

Method used

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  • Preparation process of a two-dimensional al-o-cu-fe single crystal layer sheet material
  • Preparation process of a two-dimensional al-o-cu-fe single crystal layer sheet material
  • Preparation process of a two-dimensional al-o-cu-fe single crystal layer sheet material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) According to the atomic ratio is Al 63 Cu 25 Fe 12 , the pure metal of aluminum, copper and iron is melted into a 2Kg Al-Cu-Fe alloy ingot in a vacuum electromagnetic induction furnace.

[0021] (2) Break the above alloy, and use vacuum quick quenching strip equipment to prepare strips with a thickness of 40-60μm in an argon environment, with a strip speed of 15m / s and a distance of 2.5cm between the nozzle and the single roller. bring.

[0022] (3) Prepare a 0.8mol / L NaOH solution, put the strip sample into the prepared solution, wash it with deionized water after reacting for 7 hours, then ultrasonically clean it in alcohol for 3 minutes, and dry to obtain a two-dimensional layer Flake single crystal Al-O-Cu-Fe catalytic material. Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, a large number of lamellar single crystal materials are generated on the surface of the substrate. The shape of the lamellar single crystal is irregular or hexagonal, ...

Embodiment 2

[0024] (1) According to the atomic ratio is Al 60 Cu 30 Fe 10 , the pure metal of aluminum, copper and iron is melted into a 2Kg Al-Cu-Fe alloy ingot in a vacuum electromagnetic induction furnace.

[0025] (2) Break the above alloy, and use vacuum quick quenching strip equipment to prepare strips with a thickness of 40-60μm in an argon environment, with a strip speed of 15m / s and a distance of 2.5cm between the nozzle and the single roller. bring.

[0026] (3) Prepare a 0.5mol / L NaOH solution, put the strip sample into the prepared solution, wash it with deionized water after reacting for 1 hour, then ultrasonically wash it in alcohol for 3 minutes, and dry to obtain a two-dimensional layer Flake single crystal Al-O-Cu-Fe catalytic material. The results are similar to those in the accompanying drawings, a large number of lamellar single crystal materials are formed on the surface of the substrate, the shape is irregular or hexagonal, the thickness is 30-50nm, the single cr...

Embodiment 3

[0028] (1) According to the atomic ratio is Al 70 Cu 13 Fe 17 , the pure metal of aluminum, copper and iron is melted into a 2Kg Al-Cu-Fe alloy ingot in a vacuum electromagnetic induction furnace.

[0029] (2) Break the above alloy, and use vacuum quick quenching strip equipment to prepare strips with a thickness of 40-60 μm in an argon environment, the strip strip speed is 15m / s, and the distance between the nozzle and the single roller is 2.0cm. bring.

[0030] (3) Prepare a 3.0mol / L NaOH solution, put the strip sample into the prepared solution, wash it with deionized water after reacting for 7 hours, then ultrasonically clean it in alcohol for 3 minutes, and dry to obtain a two-dimensional layer Flake single crystal Al-O-Cu-Fe catalytic material. The result is similar to the attached figure, the sheet single crystal shape is irregular or hexagonal, the thickness is 30-50nm, the single crystal size is 2-6μm, and the pore size is 1-10μm.

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Abstract

The invention discloses a preparation process of a two-dimensional Al-O-Cu-Fe single-crystalline-layer flaky material, and belongs to the field of preparation of two-dimensional flaky and catalytic materials. The preparation process includes the steps of conducting alloy material preparation according to the alloy atom ratio AlxCuyFez, wherein the sum of x, y and z is equal to 100, x is larger than or equal to 60 and smaller than or equal to 70, y is larger than or equal to 13 and smaller than or equal to 30, and z is larger than or equal to 10 and smaller than or equal to 17; preparing Al-Cu-Fe alloy strips through a vacuum rapid quenching melt-spinning method; preparing the two-dimensional Al-O-Cu-Fe single-crystalline-layer flaky material through the method of NaOH room-temperature chemical dealloying. The thickness of each flake layer is 30-50 nm, and the diameter of a single crystal wafer is between 2 micrometers and 6 micrometers. The flake layers are intercrossed to form pores, the pore size is 1-10 micrometers, and a porous structure is formed. The preparation process is simple, cost is low, the yield of the generated material of the two-dimensional flaky structure is high, and a solution is provided for industrially and controllably preparing the two-dimensional Al-O-Cu-Fe single-crystalline-layer flaky catalytic material.

Description

technical field [0001] The invention belongs to the technical field of metal catalyst material preparation and relates to the preparation of a large amount of two-dimensional Al-O-Cu-Fe single crystal layered material. Background technique [0002] Two-dimensional materials refer to materials in which electrons can only move freely (planar motion) on the non-nanoscale (1-100nm) in two dimensions, such as nanofilms, superlattices, and quantum wells. Two-dimensional materials have been widely used in electronics, catalysis, information, energy storage, sensing and other fields in recent years due to their unique electronic transport, size effect, photoelectric and magnetic properties. With the continuous progress of applied research, the preparation of catalysis-oriented two-dimensional materials has become a hot spot in this field. [0003] At present, the prepared two-dimensional catalytic materials focus on transition metal nitrides, sulfides and noble metal oxides. The p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/64C30B29/10C23F1/44B22D11/06
CPCB22D11/06C23F1/44C30B29/10C30B29/64
Inventor 何战兵王磊磊
Owner UNIV OF SCI & TECH BEIJING
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