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MoO2 nanosheets and preparation method thereof

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 effects of simple and easy methods, suitable for popularization and application, and high product precision

Inactive Publication Date: 2015-04-01
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • MoO2 nanosheets and preparation method thereof
  • MoO2 nanosheets and preparation method thereof
  • MoO2 nanosheets and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] First, 1 g of reduced graphene oxide (rGO) was dissolved in 20 ml of absolute ethanol, fully stirred in a magnetic stirrer for 1 hour, and then spin-coated on monocrystalline silicon with a length and width of 1 cm, and the thickness of the spin coating was 500 nm. . Immediately after MoO 3 Weigh 0.5g of the powder and put it into a corundum boat, and then put the spin-coated single crystal silicon face to MoO 3 The powder is placed on it but not in direct contact, and the distance between the two does not exceed 3cm. It is then placed in a constant temperature zone in a high temperature furnace, such as figure 1 . Feeding speed is the nitrogen gas of 0.2L / min, rises to 850 degrees Celsius with the temperature rise rate of 5 degrees Celsius per minute (at this temperature MoO 3 is a gaseous state), kept for 2 hours, cooled down to room temperature naturally, and took out the MoO 2 Nanosheets, that is.

[0028] Get MoO 2 Nanosheet samples such as Figure 3a As sh...

Embodiment 2

[0030] Take 5g of reduced graphene oxide (rGO) and dissolve it in 20ml of absolute ethanol, fully stir it in a magnetic stirrer for 1 hour, and then spin-coat it on a single crystal silicon with a length and width of 1cm, and the thickness of the spin coating is 350nm. Immediately after MoO 3 Weigh 2g of the powder and put it into a corundum boat, and then put the spin-coated single crystal silicon face to MoO 3 The powder is placed on it but not in direct contact, and the distance between the two does not exceed 3cm. It is then placed in a constant temperature zone in a high temperature furnace, such as figure 1 . Feeding speed is the nitrogen gas of 0.2L / min, rises to 850 degrees Celsius with the temperature rise rate of 5 degrees Celsius per minute (at this temperature MoO 3 gaseous state), kept for 2 hours, and cooled down to room temperature naturally. Compared with existing methods, the MoO prepared by this method 2 The distribution of nanosheets is uniform and the ...

Embodiment 3

[0032] Get 10g reduced graphene oxide (rGO) and be dissolved in 20ml absolute ethanol, fully stir 1 hour in magnetic stirrer, then spin-coat on the monocrystalline silicon that length and width are 1cm, spin coating thickness is 250nm. Immediately after MoO 3 Weigh 3g of the powder and put it into a corundum boat, and then put 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 does not exceed 30cm. It is then placed in a constant temperature zone in a high temperature furnace, such as figure 1 . Feeding speed is the nitrogen gas of 0.2L / min, rises to 850 degrees Celsius with the temperature rise rate of 5 degrees Celsius per minute (at this temperature MoO 3 gaseous state), kept for 2 hours, and cooled down to room temperature naturally. Compared with existing methods, the MoO prepared by this method 2 Nanosheets are uniformly distributed, MoO 2 Nanosheets are more crystalline. It ...

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Abstract

The invention provides MoO2 nanosheets and a preparation method thereof. The preparation method is characterized by comprising the following steps: (1) weighing and dissolving 1-10g of reduced graphene oxide into 20ml of anhydrous ethanol, thoroughly stirring for 1 hour in a magnetic stirrer, and then, spin-coating 1cm*1cm monocrystalline silicon; (2) weighing and putting 0.5-3g of MoO3 powder into a corundum boat; (3) placing the spin-coated monocrystalline silicon in a manner that the spin-coated monocrystalline silicon faces to the MoO3 powder and is not in direct contact with the MoO3 powder; (4) putting the monocrystalline silicon and the corundum boat in a constant-temperature zone of a high-temperature furnace, and introducing nitrogen gas N2; and (5) heating the high-temperature furnace to the temperature of 850 DEG C, maintaining for 2 hours, and naturally cooling to room temperature. According to the MoO2 nanosheets and the preparation method thereof, the method is easy and feasible, the success rate is extremely high and can reach over 90%, and the product is uniform in distribution, nano-flaky in shape and extremely high in precision, so that the MoO2 nanosheets and the preparation method thereof are suitable for popularization and application.

Description

technical field [0001] The present invention relates to prepared MoO 2 The field of nanosheets, specifically, relates to a MoO 2 Preparation method of nanosheet and MoO 2 Nanosheets. Background technique [0002] MoO 2 The preparation of products mainly includes hydrothermal method and chemical vapor deposition method, among which hydrothermal method is also called hydrothermal method, which belongs to the category of liquid phase chemical method. It refers to the chemical reaction carried out under the conditions of high temperature and high pressure in a sealed pressure vessel with water as the solvent. in MoO 2 In the preparation of the hydrothermal method, ammonium molybdate or molybdenum trioxide is often used as a precursor and then assisted by a reducing agent to react in a high temperature and high pressure environment for one to several days, then centrifuged, washed several times, and finally placed in a vacuum environment at 100 Dry at 100°C to get MoO 2 pr...

Claims

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Application Information

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Patent Type & Authority Applications(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