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Flower-shaped tungsten oxide nanometer material and preparing method thereof

A technology of nanomaterials and tungsten oxide, applied in the direction of tungsten oxide/tungsten hydroxide, nanotechnology, etc., can solve the problems of difficult preparation of nano tungsten oxide materials and low controllability, and achieve cheap and easy raw materials and short preparation time , The effect of simple preparation process

Inactive Publication Date: 2015-12-09
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operation process of the high temperature pyrolysis method is to process the material at a high temperature in a certain atmosphere and environment, so as to obtain a nano-morphological tungsten oxide material, but this method is less controllable, and it is not easy to prepare a nano-sized material with a fine shape. Tungsten oxide material

Method used

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  • Flower-shaped tungsten oxide nanometer material and preparing method thereof
  • Flower-shaped tungsten oxide nanometer material and preparing method thereof
  • Flower-shaped tungsten oxide nanometer material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 0.3g of ammonium tungstate (molecular weight: 3042), 20g of absolute ethanol, 4.2g of a binary organic acid, 0.1g of taurine were ultrasonically oscillated for 10 minutes, and the uniformly dispersed solution was poured into the core of the polytetrafluoroethylene reactor And put it in an oven at 200°C for 4 hours of constant temperature reaction, cool it down to room temperature naturally, wash and dry the product by centrifugation, and then obtain spherical flower-shaped nano-tungsten oxide powder. figure 1 It is the scanning electron microscope (SEM) image of the nano-tungsten oxide prepared in Example 1. Figure 4 It is the XRD pattern of nano tungsten oxide prepared in Example 1.

Embodiment 2

[0026] Ultrasound oscillate 0.5g ammonium tungstate (molecular weight 3042), 23g absolute ethanol, 4.5g a certain binary organic acid, 0.15g taurine for 10 minutes, and pour the uniformly dispersed solution into the core of the polytetrafluoroethylene reactor And put it in an oven at 230°C for 2 hours of constant temperature reaction, cool down to room temperature naturally, wash and dry the obtained product by centrifugation, and then obtain spherical flower-shaped nano-tungsten oxide powder. figure 2 It is the scanning electron microscope (SEM) image of the nano-tungsten oxide prepared in Example 2.

Embodiment 3

[0028] Ultrasound oscillate 0.2g ammonium tungstate (molecular weight: 3042), 15g absolute ethanol, 3.1g certain binary organic acid, 0.07g taurine for 10 minutes, pour the uniformly dispersed solution into the core of polytetrafluoroethylene reactor And placed in an oven at 150°C for constant temperature reaction for 8 hours, cooled naturally to room temperature, and the obtained product was centrifugally washed and dried to obtain a spherical flower-shaped nano-tungsten oxide powder.

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Abstract

The invention discloses a flower-shaped tungsten oxide nanometer material and a preparing method thereof. The preparing method includes the steps that tungsten salt powder with a certain mass, organic acid and a certain amount of absolute ethyl alcohol are mixed and dissolved, and ultrasonic oscillation is carried out; then the solution is added into a reaction kettle, and reacting is carried out for 2 h to 8 h at the temperature of 150 DEG C to 230 DEG C; after reacting is finished, the mixture is naturally cooled to the indoor temperature, an obtained product is centrifugally dried, and the flower-shaped tungsten oxide nanometer material is obtained. Testing through an X-ray diffractometer, a scanning electron microscope and the like shows that the flower-shaped tungsten oxide nanometer material is a spherical flower-shaped (NH4)xWO3 mixed type material and is uniform in shape, a sphere is even, flower-shaped sheets are small in thickness, and the flower-shaped tungsten oxide nanometer material and the preparing method can be applied to the fields of dye-sensitized solar cells, electrochromism and the like.

Description

technical field [0001] The invention relates to a flower-shaped tungsten oxide nano material and a preparation method thereof, belonging to the technical field of inorganic nano materials. Background technique [0002] Nano-tungsten oxide has unique properties in electrochemistry, photocatalysis, etc., and has a wide range of applications in electrochromism, gas sensors, solar cells, and super point containers. It is a multifunctional and promising inorganic transition metal oxide material, and the morphology and structure of nano-tungsten oxide have a great influence on its functional application. At present, the research on the nanostructure of tungsten oxide mainly focuses on nanorods. , nanowires, nanosheets, etc., but there are few studies on the preparation of tungsten oxide nanostructures with better sphericity and thinner flower shape. [0003] At present, there are many methods for preparing nano-tungsten oxide, such as sol-gel method, hydrothermal method, high-tem...

Claims

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Application Information

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IPC IPC(8): C01G41/02B82Y40/00
Inventor 王金敏李太良
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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