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Method for preparing tungsten oxide nano single crystal by sol-gel method

A sol-gel method, nano-single crystal technology, applied in tungsten oxide/tungsten hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of not being able to adapt to actual needs, cumbersome implementation conditions, narrow application range, etc., and achieve convenient implementation Feasible, low cost and easy to operate

Active Publication Date: 2015-02-04
扬州华翀电力电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are too complicated, the implementation conditions are cumbersome, the scope of application is narrow, and they cannot meet the actual needs.

Method used

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  • Method for preparing tungsten oxide nano single crystal by sol-gel method
  • Method for preparing tungsten oxide nano single crystal by sol-gel method
  • Method for preparing tungsten oxide nano single crystal by sol-gel method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Weigh 22.5g of PVA powder (PVA polymerization degree: 1788±50), add 150ml of distilled water, dissolve and stir in a water bath at 80°C for 4 hours to obtain a PVA solution with a mass concentration of 15%; weigh 6g of metatungstic acid Dissolve the ammonium powder in 6ml of distilled water until completely dissolved to obtain ammonium metatungstate solution, add the ammonium metatungstate solution to 60ml of PVA solution with a mass concentration of 15%, then add a small amount of alcohol to improve the viscosity of the polymer solution, and place it on a magnetic stirrer Stir evenly, then oscillate in an ultrasonic wave, and finally let it stand until the bubbles completely disappear to obtain a mixed solution, which is a clear sol-gel solution.

[0024] 2. Take 20ml of the mixed solution prepared in step 1 and put it into a burning boat, raise the temperature up to 600°C in a muffle furnace at a rate of 10°C / min, keep it warm for 4 hours and then cool with the furn...

Embodiment 2

[0026] 1. Step 1 of this embodiment is the same as that of Embodiment 1.

[0027] 2. Take 20ml of the mixed solution prepared in step 1 and put it into a burning boat, raise the temperature in a muffle furnace to 550°C at a rate of 10°C / min, keep it warm for 3 hours, and then calcinate at 800°C for 4 hours. Then cool with the furnace to get yellow powder WO 3 Nano single crystal powder.

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Abstract

The invention discloses a method for preparing a tungsten oxide nano single crystal by a sol-gel method. The method comprises the following steps of: preparing macromolecular liquor which can form sol-gel; mixing the macromolecular liquor with ammonium metatungstate liquor; insulating for a certain time at the temperature in the range of 500-900 DEG C; and then performing furnace cooling to obtain yellow powder WO3 nano single crystal powder. The average size of the WO3 nano single crystal rod prepared by the invention is as follows: 200-500nm in length and 10-30nm in diameter. The nano single crystal rod is stable and uniform and can be used for preparing high quality one-dimensional WO3 compound materials.

Description

1. Technical field [0001] The present invention relates to a WO 3 A method for preparing nano single crystal rods, especially a method for preparing WO from a sol-gel formed from a polymer solution 3 The method for nanometer single crystal belongs to the technical field of functional nanometer materials. 2. Background technology [0002] Low-dimensional nanostructured tungsten oxide (WO 3 ) is a very important functional material. Studies in recent years have shown that WO 3 Based gas-sensing materials not only show good sensitivity to oxidizing gases but also to reducing gases, and are considered to be effective in detecting NOx, H 2 S, SOx and NH 3 One of the most promising new oxide gas-sensing materials. And WO 3 The band gap width is 2.4-2.8eV, the absorption of the solar spectrum can be extended to the visible light range of about 520nm, and it has stable physical and chemical properties and light corrosion resistance, and has become one of the visible light phot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G41/02B82Y30/00B82Y40/00
Inventor 张学斌曹星星吴海俊刘佳凤仪
Owner 扬州华翀电力电子科技有限公司