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Tin oxide/vanadium dioxide composite nanomaterial and preparation method thereof

A technology of composite nanomaterials and vanadium dioxide, which is applied in the field of tin oxide/vanadium dioxide composite nanomaterials and its preparation, can solve problems such as poor weather resistance, achieve good light transmittance and weather resistance, eliminate temperature gradients, and avoid The effect of particle agglomeration

Pending Publication Date: 2022-01-04
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Application Information

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Problems solved by technology

[0005] Aiming at the problem of poor weather resistance of vanadium dioxide in the use of glass doors and windows and other buildings in the prior art, the invention provides a tin oxide / vanadium dioxide composite nanomaterial and a preparation method thereof

Method used

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preparation example Construction

[0029] The present invention at first provides the preparation method of tin oxide / vanadium dioxide composite nano material, comprises the following steps:

[0030] a. Synthesis of vanadium dioxide-doped powder: mix the vanadium dioxide precursor solution with a molar concentration of 0.1-1.5M and the precipitant at a molar ratio of 1:1-40, and the dopant at an atomic percentage of 1-10at%. Microwave hydrothermal reaction, the obtained precipitate is obtained after filtration, washing and drying. Wherein, the microwave heating temperature is 100-250° C., and the microwave reaction time is 1-4 hours. The vanadium dioxide precursor solution is at least one of vanadyl acetate, vanadyl oxalate, vanadyl sulfate, and vanadyl dichloride solutions. The precipitating agent is at least one of sodium hydroxide, ammonia water, sodium carbonate and ammonium carbonate. The doping element in the dopant is at least one of molybdenum, tungsten, fluorine, niobium, lanthanum, bismuth and manga...

Embodiment 1

[0038] Prepare vanadium dioxide-doped powder, prepare vanadyl sulfate solution with a concentration of 0.5M, add sodium carbonate as a precipitant according to the molar ratio of precipitant and vanadyl sulfate 1:10, and add doping according to the atomic percentage of 6at%. The agent sodium tungstate is fully dissolved, then microwave hydrothermal reaction is carried out at a temperature of 200°C for 2 hours, and the precipitate obtained from the reaction is filtered, washed and dried, which is doped vanadium dioxide powder.

[0039] Take a certain amount of vanadium dioxide-doped powder, disperse it in the precursor solution of tin tetrachloride pentahydrate, the molar ratio of vanadium to tin is 1:1, add a precipitant, then add the mixed solution into the digestion tank, set microwave heating The temperature is 200°C, and the reaction time is 1.5h. After the reaction is completed, cool to room temperature, filter to obtain a precipitate, alternately wash with ethanol and dei...

Embodiment 2

[0041]Prepare vanadium dioxide-doped powder, prepare a vanadyl oxalate solution with a concentration of 0.7M, add sodium carbonate as a precipitant according to the molar ratio of the precipitant to vanadyl oxalate at 1:10, and add the dopant tungsten according to the atomic percentage of 6at%. After fully dissolving sodium bicarbonate, microwave hydrothermal reaction is carried out at a temperature of 200°C for 2 hours. The precipitate obtained from the reaction is filtered, washed and dried, which is the doped vanadium dioxide powder.

[0042] Take a certain amount of vanadium dioxide-doped powder, disperse it in the precursor solution of tin tetrachloride pentahydrate, the molar ratio of vanadium to tin is 1:2, add a precipitant, then add the mixed solution into the digestion tank, set microwave heating The temperature was 200°C, and the reaction time was 2h. After the reaction was completed, it was cooled to room temperature, filtered to obtain a precipitate, washed alterna...

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Abstract

The invention belongs to the technical field of functional material preparation, and particularly relates to a tin oxide / vanadium dioxide composite nanomaterial and a preparation method thereof. In order to solve the problem of poor weather resistance of vanadium dioxide used as glass doors and windows and other buildings in the prior art, the invention provides the tin oxide / vanadium dioxide composite nano material and the preparation method thereof. The stannic oxide / vanadium dioxide composite nano material is prepared by the following method: firstly, synthesizing vanadium dioxide doped powder; and then dispersing the vanadium dioxide doped powder in a tin tetrachloride pentahydrate precursor solution, adding a precipitant, carrying out microwave heating, and filtering, washing and drying the precipitate to obtain the vanadium dioxide doped stannic chloride composite material. The prepared stannic oxide / vanadium dioxide composite nano-material takes vanadium dioxide nano-particles as a core and stannic oxide nano-particles as a shell as a protective layer, so that the stannic oxide / vanadium dioxide composite nano-material not only has good visible light permeability, but also has excellent heat resistance, moisture resistance and chemical stability.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional materials, and in particular relates to a tin oxide / vanadium dioxide composite nano material and a preparation method thereof. Background technique [0002] According to statistics, my country's building energy consumption accounts for about 30% of the total energy consumption of the society, and reducing building energy consumption is of great significance for realizing energy conservation and emission reduction. With today's society's requirements for architectural beauty and lighting, glass doors and windows account for a large proportion of building structures. Glass doors and windows are the main channels for heat exchange between buildings and the outside world. Therefore, research on energy-saving technologies for door and window glass is the key to reducing building energy consumption. At the same time, thermochromic materials refer to automatically adjusting their own i...

Claims

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Application Information

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IPC IPC(8): C01G31/02C01G19/02B82Y30/00B82Y40/00
CPCC01G31/02C01G19/02B82Y30/00B82Y40/00C01P2004/62C01P2004/64C01P2004/82
Inventor 文俊维刘波冯俊恺李道玉
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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