A reaction kettle, a vanadium dioxide nanopowder and a preparation method thereof

A technology of vanadium dioxide nanometer and reaction kettle, which is applied in the direction of vanadium oxide, chemical instruments and methods, nanotechnology, etc., which can solve the problems of excessive size and achieve the effect of easy operation and low cost

Inactive Publication Date: 2019-10-29
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN105217684A discloses a method for preparing VO 2 The powder method, which includes the use of carbon-coated surface modification to prepare particles with a three-dimensional size of less than 100nm, but its size is too large to limit the application

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  • A reaction kettle, a vanadium dioxide nanopowder and a preparation method thereof
  • A reaction kettle, a vanadium dioxide nanopowder and a preparation method thereof
  • A reaction kettle, a vanadium dioxide nanopowder and a preparation method thereof

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preparation example Construction

[0055] The embodiment of the present invention also provides a preparation method of vanadium dioxide nanopowder, which is completed by using the reaction kettle provided in the embodiment of the present invention. figure 2 It is a flowchart of the preparation method of the vanadium dioxide nanopowder provided by the embodiment of the present invention, such as figure 2 As shown, the method includes:

[0056] Step 1, preparation of basic vanadium oxide suspension.

[0057] Dissolving the vanadium-containing solid with deionized water to obtain a vanadium-containing solution, adding a hydrazine hydrate solution to the vanadium-containing solution for reaction, and adding an alkaline reagent after the reaction to obtain a basic vanadium oxide suspension.

[0058] A vanadium-containing solid is selected as a vanadium source, and deionized water is used to dissolve the vanadium-containing solid to obtain a vanadium-containing solution. There may be many kinds of vanadium-conta...

Embodiment 1

[0087] The specific method for preparing vanadium dioxide nanopowder can include:

[0088] (1) Disperse 0.55 g of vanadyl sulfate powder into 20 mL of deionized water, place it in a water bath magnetic stirrer, heat and stir to dissolve, the heating temperature is 65°C, and stir for 20 minutes to obtain a clear and transparent dark blue vanadyl sulfate solution. Take 2.5 mL of hydrazine hydrate aqueous solution with a concentration of 1 mol / L and slowly add it dropwise to the vanadyl sulfate solution to obtain a sky blue suspension. Then slowly add an aqueous sodium hydroxide solution with a concentration of 1 mol / L to adjust the pH to 10 to obtain a light brown basic vanadium oxide suspension.

[0089] (2) Centrifuge the resulting light brown basic vanadium oxide suspension to obtain basic vanadium oxide, use deionized water to ultrasonically clean the basic vanadium oxide, and disperse the cleaned basic vanadium oxide into 10 mL of deionized In water, after being stirred ev...

Embodiment 2

[0094] The specific method for preparing vanadium dioxide nanopowder can include:

[0095] (1) Disperse 0.464g of vanadyl chloride powder into 20mL of deionized water, and place it in a water bath magnetic stirrer to heat and stir to dissolve to obtain a suspension. The heating temperature is 65°C and stirred for 20 minutes to obtain a clear and transparent dark blue vanadyl sulfate solution. Instead of adding hydrazine hydrate solution, directly and slowly add 1 mol / L aqueous sodium hydroxide solution to adjust the pH to 10 to obtain a light brown basic vanadium oxide suspension.

[0096] (2) Centrifuge the resulting light brown basic vanadium oxide suspension to obtain basic vanadium oxide, use deionized water to ultrasonically clean the basic vanadium oxide, and disperse the cleaned basic vanadium oxide into 10 mL of deionized In water, after being stirred evenly, it is transferred to a quartz inner lining (second inner lining). The outer diameter of the quartz inner linin...

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Abstract

The invention provides a reaction kettle, vanadium dioxide nano powder and a preparation method of the vanadium dioxide nano powder. The method is completed by using the reaction kettle and comprisesthe steps of 1, preparation of a basic vanadium oxide suspension; 2, preparation of an initial product of the vanadium dioxide nano powder; 3, preparation of the vanadium dioxide nano powder. On the basis of a special structure of the reaction kettle and the use of an oxidizing agent capable of volatilizing oxidizing gas, a hydrothermal reaction is carried out under a specific oxidizing atmosphere, and in the presence of the specific oxidizing atmosphere, the effective control over the shape and properties of the powder is achieved; the vanadium dioxide powder with the desired shape and properties is obtained by means of a hydrothermal reaction one-step method, and the preparation method has the advantages of being convenient to operate, low in cost and the like.

Description

technical field [0001] The invention belongs to the field of inorganic functional materials, and in particular relates to a reaction kettle, a vanadium dioxide nanometer powder and a preparation method thereof. Background technique [0002] With the continuous development of science and technology, people's requirements for living comfort are also constantly increasing. The high temperature in summer makes people often rely on air conditioners to obtain a cool environment, which greatly increases energy consumption. It is reported that in China, the energy consumption of air conditioners accounts for 40-60% of the energy consumption of buildings, and 50% of the energy consumption is wasted through the window glass of buildings. Therefore, it is of great significance to adopt an effective method to control the heat exchange of the window. Vanadium dioxide (VO 2 ) is a material with thermally induced phase transition properties. When the temperature exceeds its phase trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/02B82Y30/00B82Y40/00C30B29/16
CPCB82Y30/00B82Y40/00C01G31/02C01P2002/72C01P2004/03C01P2004/04C01P2004/32C01P2004/64C30B29/16
Inventor 李静波郭德宇金海波赵政晶王泽昊王丹
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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