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Preparation method of metal molybdenum nanosheet

A technology of nanosheets and metals, 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, high control precision of growth parameters, and poor reproducibility, and achieves short preparation cycle and preparation environment requirements low cost and easy operation

Active Publication Date: 2017-05-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Preparation method of metal molybdenum nanosheet
  • Preparation method of metal molybdenum nanosheet
  • Preparation method of metal molybdenum nanosheet

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 a metal molybdenum nanosheet. The method comprises the following steps: a molybdenum source is put in a tubular furnace; air in a quartz pipe is all exhausted; then, carrier gas is introduced for reaction in an insulation state after heating; and the metal molybdenum nanosheet is obtained by cooling to the room temperature after reaction. The prepared metal molybdenum nanosheet is sheet-shaped, macroscopically takes the shape of fluffy-accumulated sponges, and microscopically has irregular edges; the size is 0.1-2 microns; and the thickness is lower than 100 nm. The preparation method is simple in process, convenient to operate, cheap in raw materials, easy to obtain the raw materials, excellent in repeatability, high in efficiency, easy to realize large-scale preparation and production, lower in requirements on the preparation environments and excellent in application and industrial propsect.

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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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