A kind of preparation method of metal molybdenum nano sheet

A nanosheet and metal technology, which is applied in the field of preparation of metal molybdenum nanosheets, can solve the problems of limiting the large-scale production of nanostructured materials, requiring high control precision of growth parameters and poor reproducibility, and meeting the requirements of short preparation period and preparation environment. Low, easy-to-operate effect

Active Publication Date: 2019-06-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can grow nanocrystals with multi-element, complex structure, and controllable morphology, but it requires high control precision of growth parameters and poor reproducibility, which largely limits the large-scale production of nanostructured materials. And the cost is higher

Method used

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  • A kind of preparation method of metal molybdenum nano sheet
  • A kind of preparation method of metal molybdenum nano sheet
  • A kind of preparation method of metal molybdenum nano sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] use as figure 1 The thermogravimetric-differential thermal analysis curve of shown molybdenum trioxide, analyze the sublimation law of molybdenum trioxide; And adopt image 3 The schematic diagram of the process flow is shown for the preparation of metallic molybdenum nanosheets.

[0033] Put the molybdenum trioxide powder without any treatment in the porcelain boat, put the porcelain boat into the quartz tube in the effective heating area of ​​the tube furnace, use the vacuum pump to exhaust the air in the quartz tube, and then inject 10vol%H 2 / Ar gas, 10vol% H during heating 2 / Ar gas flow rate is maintained at 10 sccm, and the heating rate is controlled at 20°C / min;

[0034] When the temperature of the tube furnace reaches 900°C, adjust the flow of 10vol%H 2 The amount of / Ar is a flow rate of 100 sccm, heat preservation for 2 hours, and cool to room temperature after the reaction to obtain metal molybdenum nanosheets.

[0035] By XRD results ( Figure 4 ) char...

Embodiment 2

[0040] Molybdenum nanosheets prepared according to the method in Example 1. The difference is that the reaction temperature is 790°C, and when the temperature of the tube furnace reaches 790°C, 10vol%H 2 The flow rate of / Ar is 100sccm, and after the reaction, the tube furnace is closed and cooled to room temperature to obtain metallic molybdenum nanosheets.

[0041] The product obtained in this embodiment is similar to the result of Example 1, and the metal molybdenum nanosheets have also grown; the SEM image of the prepared metal molybdenum nanosheets is as follows Figure 10 , microscopically, the size is uniform and the size is 0.1~2μm, the thickness is <100nm, and the edge has a large number of dendritic structures.

Embodiment 3

[0043] Molybdenum nanosheets prepared according to the method in Example 1. The difference is that the reaction temperature is 1000°C, when the temperature of the tube furnace reaches 1000°C, adjust the flow of 10vol%H 2 The flow rate of / Ar is 100sccm, and after the reaction, the tube furnace is closed and cooled to room temperature to obtain metallic molybdenum nanosheets.

[0044] The product obtained in this embodiment is similar to the result of Example 1, and the metal molybdenum nanosheets have also grown; the SEM image of the obtained metal molybdenum nanosheets is as follows Figure 11 As shown, it is packed and fluffy sponge.

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Abstract

The invention discloses a preparation method of metallic molybdenum nanosheets. The method comprises the following steps: placing a molybdenum source in a tube furnace, exhausting the air in the quartz tube, then introducing a carrier gas, reacting in a heat preservation state after heating up, cooling to room temperature after the reaction, and obtaining the metal molybdenum nanometer piece. The prepared metal molybdenum nanosheets are flake-like; macroscopically, they are fluffy and sponge-like, and microscopically, they have irregular edge morphology, with a size of 0.1-2 μm and a thickness of <100 nm. The preparation method of the invention has the advantages of simple process, convenient operation, cheap and easy-to-obtain raw materials, good repeatability, high efficiency, easy realization of large-scale preparation and production, low requirements on the preparation environment, and good application and industrialization prospects.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a preparation method of metallic molybdenum nanosheets. Background technique [0002] In the field of nanotechnology, the rapid development of two-dimensional materials in recent years has made nanosheet materials become a research hotspot again. Because nanomaterials often have optical, electrical, magnetic, catalytic and other functional properties and special mechanical properties that their corresponding bulk materials do not have, nanomaterials have broad potential applications. For the preparation of nanomaterials, there are generally two approaches: "bottom-up" and "top-down" preparation. The "bottom-up" preparation method includes chemical vapor deposition. For this method, the growth of nanocrystals is generally based on atomic or molecular substances containing target elements, and the growth process can be classified as "nucleation-growth"...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/28B82Y40/00
CPCB82Y40/00B22F9/28B22F1/068
Inventor 周伟家贾进陈少伟
Owner SOUTH CHINA UNIV OF TECH
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