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A preparation method of nanometer tungsten trioxide hollow agglomerated sphere powder

A nano-tungsten trioxide, hollow technology, applied in tungsten oxide/tungsten hydroxide, metal processing equipment, transportation and packaging, etc., can solve problems affecting the application of metal tungsten materials, achieve excellent physical and chemical properties, promote valence changes, active effect

Active Publication Date: 2017-11-17
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existence of these problems has seriously affected the application of metal tungsten materials in industry.

Method used

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  • A preparation method of nanometer tungsten trioxide hollow agglomerated sphere powder
  • A preparation method of nanometer tungsten trioxide hollow agglomerated sphere powder
  • A preparation method of nanometer tungsten trioxide hollow agglomerated sphere powder

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Effect test

Embodiment 1

[0040] (1) Measure 200ml of a commercially available nitric acid solution with a mass concentration of 63% and a density of 1.4g / ml, put it in a clean beaker, and fill the volume of the solution in the beaker to 400ml with deionized water.

[0041] (2) Weigh 303g of ammonium metatungstate [(NH 4 ) 6 h 2 W 12 o 40 ] White crystalline powder, added to the beaker filled with nitric acid solution in step (1), stirred for 30 minutes to make it evenly mixed.

[0042] (3) Transfer the reaction system mixed in step (2) to a polytetrafluoroethylene-lined hydrothermal reaction kettle within 10 minutes, place it in a vacuum drying oven, and control the heating rate to 3°C / min. The hydrothermal reaction was carried out at 170°C for 15 hours to obtain a hydrothermal product.

[0043] (4) Cool the hydrothermal product obtained in step (3) to room temperature, then take it out from the hydrothermal reaction kettle, and perform repeated stirring and standing treatment twice, wherein each...

Embodiment 2

[0048] (1) Measure 215ml of a commercially available nitric acid solution with a mass concentration of 63% and a density of 1.4g / ml, put it in a clean beaker, and fill the volume of the solution in the beaker to 400ml with deionized water.

[0049] (2) Weigh a certain amount of ammonium metatungstate [(NH 4 ) 6 h 2 W 12 o 40 ] White crystalline powder, added to the beaker filled with nitric acid solution in step (1), stirred for 30 minutes to make it evenly mixed.

[0050] (3) Transfer the reaction system mixed in step (2) to a polytetrafluoroethylene-lined hydrothermal reaction kettle within 10 minutes, place it in a vacuum drying oven, and control the heating rate to 4°C / min. The hydrothermal reaction was carried out at 170°C for 15 hours to obtain a hydrothermal product.

[0051] (4) Cool the hydrothermal product obtained in step (3) to room temperature, then take it out from the hydrothermal reaction kettle, and perform repeated stirring and standing treatment for 3 t...

Embodiment 3

[0056] (1) Measure 250ml of a commercially available nitric acid solution with a mass concentration of 63% and a density of 1.4g / ml, put it in a clean beaker, and fill the volume of the solution in the beaker to 400ml with deionized water.

[0057] (2) Weigh 303g of ammonium metatungstate [(NH 4 ) 6 h 2 W 12 o 40 ] White crystalline powder, added to the beaker filled with nitric acid solution in step (1), stirred for 30 minutes to make it evenly mixed.

[0058] (3) Transfer the reaction system mixed in step (2) to a polytetrafluoroethylene-lined hydrothermal reaction kettle within 10 minutes, place it in a vacuum drying oven, and control the heating rate to 5°C / min. The hydrothermal reaction was carried out at 180°C for 20 hours to obtain a hydrothermal product.

[0059] (4) Cool the hydrothermal product obtained in step (3) to room temperature, then take it out from the hydrothermal reaction kettle, and perform repeated stirring and standing treatment twice, wherein each...

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Abstract

A method for preparing nanometer tungsten trioxide hollow agglomerated ball powder. Ammonium metatungstate and high-concentration nitric acid are placed in a high-pressure hydrothermal kettle for hydrothermal reaction, and the obtained hydrothermal product is subjected to standing, cleaning, and suction filtration , and finally dried to obtain tungsten oxide powder with hollow agglomerated spheres. The fine and uniform nanometer tungsten oxide particles in the hollow agglomerated sphere prepared by the invention are extremely regularly agglomerated to form the wall of the hollow sphere, and the hollow agglomerated structure is retained in the powder after two-stage hydrogen reduction. The finished nano tungsten trioxide hollow agglomerated ball powder is porous and loose, with uniform particle size distribution, regular spherical shape, and thin spherical shell wall. Its porous structure and ultra-fine size exhibit excellent properties in chemistry, mechanics, optics and magnetism, and are expected to be widely used in military and civilian fields such as chemical industry, electronics, metallurgy, aviation, and medicine.

Description

technical field [0001] The invention relates to the technical field of preparation of nano powder materials, in particular to a preparation method of nano tungsten trioxide hollow agglomerated sphere powder. Background technique [0002] In recent years, with the continuous deepening of research on the properties of nanomaterials and related preparation technologies, ultrafine powders with special morphology and functions have shown excellent properties in chemistry, mechanics, optics and magnetism. Therefore, their It is expected to be widely used in military and civilian fields such as chemical industry, electronics, metallurgy, aviation, and medicine. Tungsten trioxide (WO 3 ) As an important transition metal oxide semiconductor, its chemical properties are stable and non-toxic, and it has important application prospects in visible light catalysis and solar energy utilization. Therefore, using WO 3 Photodegradation can directly use solar energy to degrade various organ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G41/02B22F9/22B22F1/00
CPCC01G41/02B22F9/22C01P2004/03C01P2004/34C01P2004/50C01P2004/61B22F1/0655
Inventor 魏世忠赵阳潘昆明单康宁宋向阳李亚星蒋永年王新中赵德龙
Owner HENAN UNIV OF SCI & TECH