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a kind of moo 2 Preparation method and moo of nanosheet 2 Nanosheets

A technology of nanosheets and powders, which is applied in the field of preparation of MoO2 nanosheets, can solve problems such as difficult control, waste of products, and high product impact, and achieve the effect of simple and easy method, suitable for popularization and application, and high product precision

Inactive Publication Date: 2016-11-16
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3. And the use of carbon (not spin-coated on the substrate) and MoO 3 The powders were placed in different crucibles and used high temperature to sublimate and then deposit on the substrate to prepare MoO 2 , it is worth mentioning that this method is extremely difficult to succeed, that is, the success rate is extremely low
The size uniformity of the product prepared by the hydrothermal method is not enough, and it is very easy to oxidize. However, the operation steps of the hydrothermal method are cumbersome, and the temperature and pressure need to be controlled during the production process. The temperature and pressure have a great impact on the product and are not easy to control. A lot of product is wasted when cleaning the filter
Although some people have prepared MoO by vapor phase deposition (CVD) 2 , but either it is not easy to grow on the substrate, that is, the success rate is extremely low, or the growth is impure

Method used

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  • a kind of moo <sub>2</sub> Preparation method and moo of nanosheet <sub>2</sub> Nanosheets
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  • a kind of moo <sub>2</sub> Preparation method and moo of nanosheet <sub>2</sub> Nanosheets

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Effect test

Embodiment 1

[0026] First, take 1g of reduced graphene oxide (rGO) and dissolve it in 20ml of absolute ethanol, stir it in a magnetic stirrer for 1 hour, and then spin-coat on monocrystalline silicon with a length and width of 1cm. The thickness of the spin-coating layer is 500nm. . MoO 3 Weigh 0.5g of powder into the corundum boat, and then turn the spin-coated monocrystalline silicon face to MoO 3 The powder is placed on it but not in direct contact, and the distance between the two should not exceed 3 cm. Then put it into a constant temperature zone in a high temperature furnace, such as figure 1 . The nitrogen flow rate is 0.2L / min, and the temperature rise rate is 5 degrees Celsius per minute to 850 degrees Celsius (at this temperature MoO 3 It is gaseous), keep for 2 hours, cool down to room temperature naturally, and take out MoO 2 Nanosheets are available immediately.

[0027] Get MoO 2 Nanosheet samples such as Figure 3a As shown, compared with the existing method, the MoO prepared...

Embodiment 2

[0029] Take 5g of reduced graphene oxide (rGO) and dissolve it in 20ml of absolute ethanol, stir it fully in a magnetic stirrer for 1 hour, and then spin-coat on single crystal silicon with a length and a width of 1cm, with a spin-coating thickness of 350nm. MoO 3 Weigh 2g of powder into the corundum boat, and then turn the spin-coated monocrystalline silicon face to MoO 3 The powder is placed on it but not in direct contact, and the distance between the two should not exceed 3 cm. Then put it into a constant temperature zone in a high temperature furnace, such as figure 1 . The nitrogen flow rate is 0.2L / min, and the temperature rise rate is 5 degrees Celsius per minute to 850 degrees Celsius (at this temperature MoO 3 It is gaseous), keep it for 2 hours, and cool to room temperature naturally. Compared with the existing method, the MoO prepared by this method 2 The nanosheets are evenly distributed and have higher crystallinity. It reacts as follows: 2MoO 3 (g)+C(g)=2MoO 2 (...

Embodiment 3

[0031] Take 10g of reduced graphene oxide (rGO) and dissolve it in 20ml of absolute ethanol, stir it fully in a magnetic stirrer for 1 hour, and then spin-coat on a single crystal silicon with a length and width of 1cm. The thickness of the spin-coating is 250nm. MoO 3 Weigh 3g of powder into the corundum boat, and then turn the spin-coated monocrystalline silicon face to MoO 3 The powder is placed on it but not in direct contact, and the distance between the two should not exceed 30 cm. Then put it into a constant temperature zone in a high temperature furnace, such as figure 1 . The nitrogen flow rate is 0.2L / min, and the temperature rise rate is 5 degrees Celsius per minute to 850 degrees Celsius (at this temperature MoO 3 It is gaseous), keep it for 2 hours, and cool to room temperature naturally. Compared with the existing method, the MoO prepared by this method 2 Nanosheets are evenly distributed, MoO 2 Nanosheets have higher crystallinity. It reacts as follows: 2MoO 3 (...

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Abstract

The present invention provides a method for preparing MoO2 nanosheets and a method for preparing MoO2 nanosheets, which are characterized by comprising the following steps: (1) dissolving 1 g-10 g of reduced graphene oxide in 20 ml of absolute ethanol, and in a magnetic stirrer Stir thoroughly for 1 hour, and then spin-coat on 1cmX1cm monocrystalline silicon; (2) Take 0.5g-3g MoO3 powder and put it in a corundum boat; (3) Place the spin-coated monocrystalline silicon facing the MoO3 powder without direct contact MoO3 powder; (4) Put the single crystal silicon and the steel jade boat into the constant temperature zone of the high temperature furnace, and pass nitrogen N2; (5) Heat the high temperature furnace to 850 degrees Celsius and keep it for 2 hours, and naturally cool down to room temperature. The method of the invention is simple and easy to implement, the success rate is extremely high, can reach more than 90%, the product distribution is uniform, the shape is nano flakes, the product precision is extremely high, and it is suitable for popularization and application.

Description

Technical field [0001] The present invention relates to prepared MoO 2 The field of nanosheets, specifically, involves a kind of MoO 2 Nanosheet preparation method and MoO 2 Nanosheets. Background technique [0002] MoO 2 The preparation of products mainly includes hydrothermal method and chemical vapor deposition method. The hydrothermal method is also called hydrothermal method, which belongs to the category of liquid-phase chemical method. It refers to a chemical reaction that takes water as a solvent in a sealed pressure vessel under high temperature and high pressure conditions. In MoO 2 In the preparation of hydrothermal method, ammonium molybdate or molybdenum trioxide is commonly used as a precursor, and then reacted under high temperature and high pressure environment with a reducing agent for one to more days, then centrifuged, cleaned several times, and finally placed in a vacuum environment at 100 MoO is obtained by drying in degrees Celsius 2 product. Chemical vapo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/02B82Y30/00B82Y40/00
CPCC01G39/02C01P2002/72C01P2004/03C01P2004/64
Inventor 张仲相忠诚王庆宝
Owner UNIV OF JINAN