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A preparation method of cesium-doped tungsten bronze nanopowder with near-infrared shielding performance

A technology of shielding performance and nano-powder is applied in the field of preparation of cesium-doped tungsten bronze nano-powder, and achieves the effects of small primary particle size, low cost and simple production process

Active Publication Date: 2021-04-09
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current production methods are difficult to meet the above requirements, which requires vigorous development of new synthesis processes

Method used

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  • A preparation method of cesium-doped tungsten bronze nanopowder with near-infrared shielding performance
  • A preparation method of cesium-doped tungsten bronze nanopowder with near-infrared shielding performance
  • A preparation method of cesium-doped tungsten bronze nanopowder with near-infrared shielding performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A. First, dissolve 0.016mol of cesium carbonate in 20ml of 30% hydrogen peroxide, then add 0.1mol of sodium tungstate to it, and react while stirring at 60°C. After fully reacting, a suspension is obtained, and the suspension is placed in an oven Dry at 60°C to obtain the precursor;

[0018] B. The precursor obtained in A is premixed with cetyl alcohol under mechanical stirring, followed by sanding, the mass ratio of cetyl alcohol to the precursor is 1.5, the sanding time is 30 minutes, and the filling of the grinding ball The ratio is 70%, and the uniformly dispersed reaction slurry is obtained after sand grinding;

[0019] C. Place the reaction slurry obtained in B in a closed reaction vessel with stirring function for heat treatment, the heat treatment temperature is 240°C, the heat treatment time is 6h, and naturally cool after the reaction;

[0020] D. Separate the product obtained in C, wash it with ethanol and water respectively, and then dry it in an oven at 80...

Embodiment 2

[0022] A preparation method of cesium-doped tungsten bronze nano powder, characterized in comprising the following steps:

[0023] A. First, dissolve 0.032mol cesium chloride in 20ml 30% hydrogen peroxide, then add 0.1mol sodium tungstate to it, and react while stirring at 70°C. After fully reacting, a suspension is obtained, and the suspension is placed in an oven Dry at 60°C to obtain the precursor;

[0024] B. The precursor obtained in A is premixed with oleic acid under mechanical agitation, followed by sand milling, the mass ratio of oleic acid to the precursor is 1, the sand milling time is 30 minutes, and the filling ratio of the grinding balls is 70%, get a uniformly dispersed reaction slurry after sand milling;

[0025] C. Place the reaction slurry obtained in B in a closed reaction vessel with stirring function for heat treatment, the heat treatment temperature is 240°C, the heat treatment time is 6h, and naturally cool after the reaction;

[0026] D. Separate the ...

Embodiment 3

[0028] A preparation method of cesium-doped tungsten bronze nano powder, characterized in comprising the following steps:

[0029] A. First, dissolve 0.030mol of cesium hydroxide in 20ml of 30% hydrogen peroxide, then add 0.1mol of tungstic acid to it, and react while stirring at 70°C. After fully reacting, a suspension is obtained, and the suspension is placed in an oven Dry at 70°C to obtain the precursor;

[0030] B. The precursor obtained in A is premixed with cetyl alcohol under mechanical stirring, followed by sanding, the mass ratio of cetyl alcohol to the precursor is 0.5, the sanding time is 30 minutes, and the filling of the grinding ball The ratio is 70%, and the uniformly dispersed reaction slurry is obtained after sand grinding;

[0031] C. Place the reaction slurry obtained in B in a closed reaction vessel with stirring function for heat treatment, the heat treatment temperature is 240°C, the heat treatment time is 6h, and naturally cool after the reaction;

[...

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Abstract

The invention discloses a preparation method of cesium-doped tungsten bronze nanopowder with near-infrared shielding performance, comprising the following steps: A. Preparing a precursor, weighing according to the atomic ratio of the cesium raw material to the tungsten raw material of the reaction substance is 0.30-0.32 Ingredients; dissolved in hydrogen peroxide; reaction at 60-80°C to obtain precursor suspension; B. drying the precursor suspension; C. premixing the precursor in the reaction solvent, followed by grinding; D. heat treatment; E . The above product is separated, washed and dried to obtain cesium-doped tungsten bronze nanopowder. The present invention has simple experimental process, high repeatability, low energy consumption, and almost no harm to people and the environment. The obtained tungsten bronze nanopowder has a high cesium doping ratio, small particle size, high purity, low degree of agglomeration, and nearly Excellent infrared shielding performance.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a preparation method of cesium-doped tungsten bronze nanopowder with near-infrared shielding performance. Background technique [0002] In recent years, with the depletion of energy and the intensification of the greenhouse effect, energy conservation and emission reduction have become the theme of today's era. Sunlight can be divided into three types of rays according to wavelength and energy: ultraviolet rays (wavelength less than 400nm), visible light (wavelength greater than 400nm and less than 780nm), and near-infrared rays (wavelength greater than 780nm and less than 2500nm). Near infrared rays account for 52% of the sun's total energy and are generally considered to be the main source of heat. About one-fourth of the total energy consumption of society is used for cooling and heating buildings, vehicles, etc. every year. Windows are the main sourc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G41/00
CPCC01G41/00C01P2002/72C01P2004/04C01P2006/90
Inventor 高彦峰姚勇吉陈长张良苗
Owner SHANGHAI UNIV