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Preparation method of cesium tungsten bronze/tungsten oxide composite material

A composite material, cesium tungsten bronze technology, applied in tungsten compounds, chemical instruments and methods, tungsten oxide/tungsten hydroxide, etc., can solve the problems of uneven distribution of components, low cost, low material purity, etc., and achieve good application The effect of high value, good repeatability and simple preparation process

Pending Publication Date: 2021-05-04
BEIJING INFORMATION SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is low in cost and simple in operation, but the prepared material has the disadvantages of low purity and uneven distribution of components.

Method used

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  • Preparation method of cesium tungsten bronze/tungsten oxide composite material
  • Preparation method of cesium tungsten bronze/tungsten oxide composite material
  • Preparation method of cesium tungsten bronze/tungsten oxide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Disperse 0.5g of tungstic acid in 20mL of pure water at room temperature and stir to form a uniform dispersion; dissolve 0.3g of cesium salt in 10mL of pure water and add it to the dispersion obtained above, stir evenly to form a suspension solution; take 5mL of ethylene glycol, add it to the suspension obtained above, and stir evenly; add it to the reaction kettle, and react at 220°C for 0.5h; centrifuge the obtained product, wash it with water, and Dry at -50°C for 24-48 hours to obtain a composite material of blue powder. In the composite material, the mass ratio of cesium tungsten bronze to tungsten oxide is 1:0.77.

[0052] An appropriate amount of sample was taken for XRD detection. Comparing the obtained spectrum with the standard spectrum, it is found that it is composed of the spectrum of two compounds of cesium tungsten bronze (JCPDS81-1244) and tungsten oxide (JCPDS 83-0951), indicating that the prepared material is cesium tungsten bronze / oxide Tungsten com...

Embodiment 2

[0054] Disperse 0.5g of tungstic acid in 20mL of pure water at room temperature and stir to form a uniform dispersion; dissolve 0.61g of cesium salt in 10mL of pure water and add it to the dispersion obtained above, stir evenly to form a suspension solution; then take 5mL ethylene glycol, add it to the suspension obtained above, and stir evenly; add it to the reaction kettle, and react at 230°C for 3h; centrifuge the obtained product, wash it with water, and put it in 30- Dry at 50°C for 24-48h to obtain a blue powder. In the composite material, the mass ratio of cesium tungsten bronze to tungsten oxide is 1:0.38.

[0055] An appropriate amount of sample was taken for XRD detection. Comparing the obtained spectrum with the standard spectrum, it is found that it is composed of the spectrum of two compounds of cesium tungsten bronze (JCPDS81-1244) and tungsten oxide (JCPDS 83-0951), indicating that the prepared material is cesium tungsten bronze / oxide Tungsten composites. Ano...

Embodiment 3

[0057] Disperse 0.5g of tungstic acid in 20mL of pure water at room temperature and stir to form a uniform dispersion; dissolve 0.93g of cesium salt in 10mL of pure water and add it to the dispersion obtained above, stir evenly to form a suspension solution; then take 5mL ethylene glycol, add it to the suspension obtained above, and stir evenly; add it to the reaction kettle, and react at 230°C for 16h; centrifuge the obtained product, wash it with water, and in 30- Dry at 50°C for 24-48h to obtain a blue powder. In the composite material, the mass ratio of cesium tungsten bronze to tungsten oxide is 1:0.25.

[0058] An appropriate amount of sample was taken for XRD detection. Comparing the obtained spectrum with the standard spectrum, it is found that it is composed of the spectrum of two compounds of cesium tungsten bronze (JCPDS81-1244) and tungsten oxide (JCPDS 83-0951), indicating that the prepared material is cesium tungsten bronze / oxide Tungsten composites. Another s...

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Abstract

The invention discloses a preparation method of a cesium tungsten bronze / tungsten oxide composite material, which comprises the following steps: adding tungstic acid and cesium salt into deionized water at normal pressure and room temperature, uniformly stirring, adding ethylene glycol, and stirring to obtain a reaction solution; and reacting at 160-240 DEG C, centrifuging, washing and drying to obtain a cesium tungsten bronze / tungsten oxide composite material, wherein the mass ratio of the tungstic acid to the cesium salt in the reaction liquid is 1:(0.22-1.86), and the concentration of the cesium salt in the reaction liquid is 0.008-0.043 g / mL. In the method, the cesium tungsten bronze and the tungsten oxide are simultaneously generated, the cesium tungsten bronze and the tungsten oxide are uniformly mixed and distributed in the composite material, and the performance of each part of the composite material is completely consistent. In addition, the preparation process is simple, the repeatability is good, large-scale production can be achieved, and the good application value is achieved. Meanwhile, the obtained composite material has good infrared light absorption performance, and the lowest light transmittance of near-infrared light is 10% within the wavelength range of 1200-2500nm.

Description

technical field [0001] The invention relates to the technical field of near-infrared absorbing materials. More specifically, it relates to a preparation method of cesium tungsten bronze / tungsten oxide composite material. Background technique [0002] In the total energy consumption of society, building consumption accounts for about 30%, and building energy consumption is more concentrated than other energy consumption time. Studies have shown that 73% of the indoor heat of buildings enters through windows, and the incoming heat mainly comes from sunlight. The wavebands of solar radiation mainly include ultraviolet light (240-400 nanometers), visible light (400-780 nanometers) and near-infrared light (780-2500 nanometers). The near-infrared band accounts for about 52% of the total energy of the sun, and it is generally believed that this band is the main source of heat. Ordinary glass cannot selectively transmit sunlight. Therefore, while visible light passes through, a l...

Claims

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Application Information

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IPC IPC(8): C01G41/00C01G41/02C09K3/00B82Y40/00B82Y30/00
CPCC01G41/00C01G41/02C09K3/00B82Y40/00B82Y30/00C01P2002/72C01P2004/03C01P2004/04C01P2004/50C01P2004/80
Inventor 杨明庆赵林元吕勇牛春晖李晓英耿蕊
Owner BEIJING INFORMATION SCI & TECH UNIV
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