High-performance tungsten oxide nanometer powder as well as preparation method and application thereof

A nano-powder, tungsten oxide technology, applied in tungsten oxide/tungsten hydroxide, nanotechnology, nanotechnology and other directions to achieve the effect of improving dimming efficiency

Inactive Publication Date: 2018-11-23
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the systematic control of anoxic tungsten oxide nanopowders to achieve autonomous and selective control of photochromism.

Method used

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  • High-performance tungsten oxide nanometer powder as well as preparation method and application thereof
  • High-performance tungsten oxide nanometer powder as well as preparation method and application thereof
  • High-performance tungsten oxide nanometer powder as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Measure 60ml of 1.5mol / l ammonium tungstate aqueous solution and stir until completely dissolved. Add 10ml of 0.5mol oxalic acid solution, then slowly add hydrochloric acid dropwise while stirring to adjust the pH value to 1, and stir for half an hour until the hexavalent tungsten precursor solution is obtained; take 50ml of the precursor solution and add it to the reaction kettle, and transfer it to the hydrothermal furnace , set the temperature at 120°C, and keep it warm for 30 hours; after the hydrothermal reaction, let it cool naturally, turn on the hydrothermal furnace, and wash and filter the reaction mother liquor of tungsten oxide self-coated nanopowder several times until the surface of the powder is acidic. The substance was washed clean, transferred to a drying oven, and dried at 80°C for 8h. The sample is named S2.

[0074] The properties of the obtained oxygen-deficient tungsten oxide nanopowders were characterized by XRD, TEM and spectrophotometer.

[00...

Embodiment 2

[0080] Measure 60ml of 1.5mol / l ammonium tungstate aqueous solution and stir until completely dissolved. Add 20ml of 0.5mol oxalic acid solution, then slowly add hydrochloric acid dropwise while stirring to adjust the pH value to 1, and stir for half an hour until the hexavalent tungsten precursor solution is obtained; take 50ml of the precursor solution and add it to the reaction kettle, and transfer it to the hydrothermal furnace , set the temperature at 120°C, and keep it warm for 30 hours; after the hydrothermal reaction, let it cool naturally, turn on the hydrothermal furnace, and wash and filter the reaction mother liquor of tungsten oxide self-coated nanopowder several times until the surface of the powder is acidic. The substance was washed clean, transferred to a drying oven, and dried at 80°C for 8h. The sample is named S3.

[0081] See figure 1 , From the XRD spectrum, it can be seen that the obtained tungsten oxide nanopowder is the same as that of Example 1, whi...

Embodiment 3

[0084] Weigh 25ml of 1.5mol / l ammonium tungstate aqueous solution, add 20ml of 0.5mol oxalic acid solution, and stir for half an hour until the hexavalent tungsten precursor solution (its pH value is <1); take 50ml of the precursor solution and add it to the reaction kettle , transferred to a hydrothermal furnace, set the temperature at 120 ° C, and kept it warm for 30 hours; after the hydrothermal reaction was completed, let it cool naturally, turned on the hydrothermal furnace, and washed and filtered the reaction mother liquor of the tungsten oxide self-coated nanopowder several times , until the surface of the powder is washed with acid substances, transferred to a drying oven, and dried at 80°C for 8 hours. The sample is named S4.

[0085] See figure 1 , from the XRD spectrum, it can be seen that the obtained tungsten oxide nanopowder is hexagonal phase tungsten oxide.

[0086] See Image 6 , from the TEM picture, it shows that the obtained tungsten oxide nanopowder is...

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Abstract

The invention relates to high-performance tungsten oxide nanometer powder as well as a preparation method and application thereof. The tungsten oxide nanometer powder is at least one of crystallization type tungsten oxide and amorphous state tungsten oxide; the structure formula of the tungsten oxide nanometer powder is WO3-x, wherein the x range meets the condition that the x is greater than or equal to 0 but is smaller than or equal to 1, preferably, x is greater than 0.1 but is smaller than 0.5. According to the high-performance tungsten oxide nanometer powder, the crystallization type tungsten oxide and the amorphous state tungsten oxide coexist; the interface enhancing effect is realized. The light regulation efficiency is effectively improved; the light regulating range is regulatedand controlled in a controllable way.

Description

technical field [0001] The invention belongs to the field of inorganic nanometer materials, and in particular relates to a photochromic nanometer powder and its preparation method and application. Background technique [0002] Building energy consumption generally accounts for more than one-third of the total energy consumption of society. At the same time, building energy consumption contributes as much as 25% to the world's greenhouse gas emissions, making it one of the key households for reducing greenhouse gas emissions. Glass windows are the main channel for light and heat exchange between buildings and the outside world. Statistics show that 50% of building energy consumption is carried out through glass windows; and the heat absorption of building exterior walls also aggravates the heat island phenomenon in the city center. Therefore, realizing building energy saving will play a decisive role in reducing building greenhouse gas emissions. Similarly, the energy saving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G41/02C01P2002/72C01P2002/85C01P2004/04C01P2004/16C01P2004/17C01P2004/64
Inventor 金平实李宁纪士东李荣
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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