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Preparation method of WO3 nanosphere

A new technology of nanospheres, applied in the field of preparation of new WO3 nanospheres, can solve the problems that it is difficult to prepare nanosphere materials, not easy to prepare, and difficult to control the formation conditions of one-dimensional short rod stacking, etc., to achieve a simple and controllable process , Uniform shape, easy mass production

Inactive Publication Date: 2012-09-12
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently about manufacturing WO 3 There are few reports on nanospheres, and traditional manufacturing methods such as vapor deposition and thermal evaporation are difficult to prepare nanosphere materials, while the hydrothermal method is used to directly manufacture WO 3 Nanosphere materials have obvious advantages, such as no need for special equipment, high purity of the obtained product, suitable for large-scale industrial manufacturing, etc.
However, it is not easy to prepare WO with similar size and uniform shape due to the difficulty in controlling the formation conditions of one-dimensional short rod stacking. 3 nanosphere

Method used

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  • Preparation method of WO3 nanosphere
  • Preparation method of WO3 nanosphere
  • Preparation method of WO3 nanosphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The preparation method of this example comprises the following steps:

[0011] 1) Disperse and dissolve 0.989g of sodium tungstate in deionized water by ultrasonic for 30 minutes, and adjust the pH value of the above solution to 1.0 by adding 3mol / L hydrochloric acid drop by drop.

[0012] 2) Weigh 0.351g of sodium chloride particle powder with a molar ratio of 1:2 to sodium tungstate, slowly add the above solution as a mineralizer, and stir fully and uniformly for 30 minutes to obtain light yellow transparent and clear tungstic acid sol.

[0013] 3) Transfer the above-mentioned tungstic acid sol to a polytetrafluoroethylene reaction vessel with a capacity of 45 ml matched with a stainless steel hydrothermal kettle, and keep the filling degree at 75% for hydrothermal reaction. The working temperature of the hydrothermal reaction is 160 degrees Celsius. The time is 24 hours.

[0014] 4) Centrifuge the light yellow product obtained above, filter the supernatant by de...

Embodiment 2

[0016] The preparation method of this example comprises the following steps:

[0017] 1) Disperse and dissolve 1.980g of sodium tungstate in deionized water by ultrasonic for 30 minutes, and adjust the pH value of the above solution to 1.2 by adding 3mol / L hydrochloric acid drop by drop.

[0018] 2) Weigh 0.8766g of sodium chloride particle powder with a molar ratio of 1:2.5 to sodium tungstate, slowly add the above solution as a mineralizer, and stir fully and uniformly for 45 minutes to obtain light yellow transparent and clear tungstic acid sol.

[0019] 3) Transfer the above-mentioned tungstic acid sol to a polytetrafluoroethylene reaction vessel with a capacity of 100 ml matched with a stainless steel hydrothermal kettle, and keep the filling degree at 90% for hydrothermal reaction. The working temperature of the hydrothermal reaction is 180 degrees Celsius. The time is 24 hours.

[0020] 4) Centrifuge the light yellow product obtained above, filter the supernatant b...

Embodiment 3

[0022] The preparation method of this example comprises the following steps:

[0023] 1) Disperse and dissolve 0.495g of sodium tungstate in deionized water by ultrasonic for 30 minutes, and adjust the pH value of the above solution to 1.1 by adding 3mol / L hydrochloric acid drop by drop.

[0024] 2) Weigh 0.219g of sodium chloride particle powder with a molar ratio of 1:2.5 to sodium tungstate, slowly add the above solution as a mineralizer, and stir fully and uniformly for 25 minutes to obtain light yellow transparent and clear tungstic acid sol.

[0025] 3) Transfer the above-mentioned tungstic acid sol to a polytetrafluoroethylene reaction vessel with a capacity of 25 ml matched with a stainless steel hydrothermal kettle, and keep the filling degree at 80% for hydrothermal reaction. The working temperature of the hydrothermal reaction is 160 degrees Celsius. The time is 24 hours.

[0026] 4) Centrifuge the light yellow product obtained above, filter the supernatant by ...

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Abstract

The invention relates to a preparation method of a novel WO3 nanosphere, and pertains to the technical field of nanometer material manufacturing processes. The preparation method is characterized in that: tungstic acid sol is controlled at a certain pH value condition, different ratios of a mineralizer and raw materials are selected, reaction conditions such as different reaction vessel filling degrees, reaction time and the like are maintained, and the novel WO3 nanosphere one-dimensional material is prepared by using a hydrothermal method. Crystalline phase, morphology, size and the like of the product are analysed by using characterization methods such as X- ray powder diffraction (XRD), scanning electron microscope (SEM) and the like. The analysis result shows that the novel WO3 nanosphere one-dimensional material formed by stacking hexagonal crystal system WO3 ingots can be prepared successfully by using the method provided in the invention, and the radius of the prepared WO3 nanosphere is 2-2.5mum.

Description

technical field [0001] The present invention relates to a novel WO 3 The invention discloses a method for preparing nanospheres, which belongs to the technical field of nanomaterial manufacturing technology. Background technique [0002] WO 3 It is an important semiconductor material and has a wide range of applications in the fields of semiconductor materials, gas-sensitive element applications, photoluminescent films, and photocatalytic degradation of colored organic polluted wastewater. WO 3 Materials have long been a research hotspot for researchers. Compared with traditional one-dimensional materials, nanospheres formed by stacking one-dimensional short rods can greatly enhance the catalytic efficiency by increasing the active sites in gas sensitivity research or improving the effective adsorption in photocatalytic degradation research. Nanospheres have shown unique advantages. Currently about manufacturing WO 3 There are few reports on nanospheres, and tradition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/02B82Y40/00
Inventor 马文杰娄慧慧向群徐甲强
Owner SHANGHAI UNIV
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