Silver oxide tungsten bronze composite heat-insulating material with high visible light photocatalytic performance and preparation method thereof

A thermal insulation material, tungsten bronze technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low visible light utilization and visible light photocatalytic performance Improvement and other issues, to achieve the effect of visible light photocatalytic performance improvement, high practical application value, and easy implementation

Inactive Publication Date: 2018-09-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titanium dioxide has a large band gap and almost no absorption in the visible light band, so the composite material has a low utilization rate of visible light, which accounts for 43% of the total solar energy. The degradation rate of rhodamine B with a concentration of 20mg / L in 50ml is only 80%, and the visible light photocatalytic performance needs to be improved

Method used

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  • Silver oxide tungsten bronze composite heat-insulating material with high visible light photocatalytic performance and preparation method thereof
  • Silver oxide tungsten bronze composite heat-insulating material with high visible light photocatalytic performance and preparation method thereof
  • Silver oxide tungsten bronze composite heat-insulating material with high visible light photocatalytic performance and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A method for synthesizing a silver oxide potassium tungsten bronze composite insulation material with high visible light photocatalytic performance, comprising the steps of:

[0034] (1) Weigh 0.2g of potassium tungsten bronze and add it to a beaker with 50ml of deionized water, ultrasonically disperse it for 10 minutes to obtain dispersion A, weigh 0.029g of silver nitrate solid particles and place them in dispersion A, potassium tungsten bronze and oxidation The mass ratio of silver was 10 to 1; in the dark, after ultrasonic treatment for 10 min, and then magnetic stirring for 30 min in the dark, the dispersion B was obtained.

[0035] (2) Add dropwise enough to make all the silver ions in the solution into the sodium hydroxide solution of 0.01mol / L of silver oxide in the dispersion B, the pH value of control reaction is 8, while adding dropwise, magnetic stirring, After the dropwise addition, the magnetic stirring was continued for 5 min. Then, it was washed twice w...

Embodiment 2

[0037] A method for synthesizing a silver oxide potassium tungsten bronze composite insulation material with high visible light photocatalytic performance, comprising the steps of:

[0038] (1) Weigh 0.2g of potassium tungsten bronze and add it to a beaker containing 50ml of deionized water, ultrasonically disperse for 10 minutes to obtain dispersion A, weigh 0.0097g (the mass ratio of potassium tungsten bronze to silver oxide is 30 to 1) nitric acid The silver solid particles were placed in the dispersion A, and in the dark, ultrasonicated for 10 minutes, and then magnetically stirred for 30 minutes in the dark to obtain the dispersion B.

[0039](2) Add dropwise enough to make all the silver ions in the solution into the 0.01mol / L sodium hydroxide solution of silver oxide in the dispersion B, the pH value of the control reaction is 8, while adding dropwise, magnetically stirred, After the dropwise addition, the magnetic stirring was continued for 5 min. Then, it was washed ...

Embodiment 3

[0041] A method for synthesizing a silver oxide potassium tungsten bronze composite insulation material with high visible light photocatalytic performance, comprising the steps of:

[0042] (1) Weigh 0.2g of potassium tungsten bronze and add it to a beaker with 50ml of deionized water, ultrasonically disperse it for 10 minutes to obtain dispersion A, weigh 0.000733g (the mass ratio of potassium tungsten bronze to silver oxide is 200 to 1) nitric acid The silver solid particles were placed in the dispersion A, and after being ultrasonicated for 10 minutes in the dark, and then magnetically stirred for 30 minutes in the dark, the dispersion B was obtained.

[0043] (2) Add dropwise enough to make all the silver ions in the solution into the 0.01mol / L sodium hydroxide solution of silver oxide in the dispersion B, the pH value of the control reaction is 8, while adding dropwise, magnetically stirred, After the dropwise addition, the magnetic stirring was continued for 5 min. Then...

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Abstract

The invention discloses a silver oxide tungsten bronze composite heat-insulating material with high visible light photocatalytic performance and a preparation method thereof. The silver oxide-tungsten-bronze composite heat-insulating material is formed by silver oxide and tungsten bronze: the silver oxide-coated potassium-tungsten bronze; under the condition of visible light, rhodamine B solutionwith a concentration of 20mg/L was used, and the degradation rate of rhodamine B is over 95% within 30 minutes of visible light irradiation. In the preparation method, the tungsten bronze nano powderis dispersed in the deionized water, and the dispersion liquid A is obtained by ultrasonic dispersion; the silver nitrate is added into the dispersion A, the ultrasonic treatment is carried out underthe dark condition, and then the tungsten bronze and the silver nitrate solution are fully mixed under the dark condition to obtain the dispersion liquid B; alkaline solution is added into the dispersion liquid B, the pH value is controlled, reaction is continuously carried out after the completion of the dropping, then washing, centrifuging and drying are carried out orderly. The material has good transparency, near-infrared shielding performance and heat insulation performance while remarkably improving the utilization efficiency of visible light.

Description

technical field [0001] The invention relates to a silver oxide tungsten bronze composite heat insulating material with high visible light photocatalytic performance and a preparation method thereof. Background technique [0002] With the development of human society and industrial production, people's demand for energy continues to increase. Traditional energy sources such as oil and coal are gradually being exhausted, and the energy crisis is becoming more and more serious. At the same time, a large number of pollutants produced by industrial production are harmful to human health. Posing a threat, energy saving and environmental protection are getting more and more attention. Glass is widely used in construction, automobile and so on. On the one hand, ordinary glass has poor thermal insulation performance, which causes the indoor temperature to rise and wastes energy. Therefore, exploring new thermal barrier materials that can be used to prepare insulating glass has becom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/00B01J23/68B01J35/00
CPCB01J23/687B01J35/004B01J35/006B01J35/0073C03C17/006C03C2217/23C03C2217/71
Inventor 高强吴笑梅蔡李刚樊粤明
Owner SOUTH CHINA UNIV OF TECH
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