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A kind of preparation method of tungsten trioxide nanotube

A technology of tungsten trioxide and nanotubes, which is applied in the direction of tungsten oxide/tungsten hydroxide, nanotechnology, nanotechnology, etc., which can solve complex process, few preparation methods of tungsten oxide nanotube structure, and uncontrollable size of nanotube powder material and other issues, to achieve the effects of strong size controllability, conducive to large-scale industrial production, and wide applicability

Active Publication Date: 2020-05-05
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above research reports, there are few preparation methods for the structure of tungsten oxide nanotubes, and the process is relatively complicated, and the size of the prepared nanotube powder material is uncontrollable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method for tungsten trioxide nanotubes, comprising the following process steps:

[0018] 1) Spread 5g of tungsten hexacarbonyl on the bottom of the ceramic crucible, and place a porous anodized aluminum template with a pore diameter of 40nm downwards on top of tungsten hexacarbonyl, seal the crucible and heat it in a tube furnace to 100°C And keep it warm for 60 minutes, continue to heat up to 300°C and keep it warm for 40 minutes to get metal tungsten deposition;

[0019] 2) Continue to heat up the tube furnace in step 1) to 550°C and keep it warm for 60 minutes;

[0020] 3) When the temperature of the ceramic crucible in step 2) drops to room temperature, the sample is taken out, and the porous alumina template is removed with a phosphoric acid solution having a concentration of 0.3mol / L, and then treated by suction filtration and dried to obtain the tungsten trioxide nano Tube powder material finished product.

Embodiment 2

[0022] A preparation method for tungsten trioxide nanotubes, comprising the following process steps:

[0023] 1) Spread 5g of tungsten hexacarbonyl on the bottom of the ceramic crucible, then place a porous anodized aluminum template with a pore size of 10nm downwards on top of tungsten hexacarbonyl, seal the crucible and place it in a tube furnace for heating to 50°C And keep it warm for 200min, continue to heat up to 300°C and keep it warm for 40min, to get metal tungsten deposition;

[0024] 2) Continue to heat up the tube furnace in step 1) to 550°C and keep it warm for 60 minutes;

[0025] 3) When the temperature of the ceramic crucible in step 2) drops to room temperature, the sample is taken out, and the porous alumina template is removed with a phosphoric acid solution having a concentration of 0.3mol / L. Tube powder material finished product.

Embodiment 3

[0027] A preparation method for tungsten trioxide nanotubes, comprising the following process steps:

[0028] 1) Spread 5g of tungsten hexacarbonyl on the bottom of the ceramic crucible, and place a porous anodized aluminum template with a pore diameter of 200nm downwards on top of tungsten hexacarbonyl, seal the crucible and heat it in a tube furnace to 150°C And keep it warm for 30 minutes, continue to heat up to 300°C and keep it warm for 40 minutes, to get metal tungsten deposition;

[0029] 2) Continue to heat up the tube furnace in step 1) to 550°C and keep it warm for 60 minutes;

[0030] 3) When the temperature of the ceramic crucible in step 2) drops to room temperature, the sample is taken out, and the porous alumina template is removed with a phosphoric acid solution having a concentration of 0.1mol / L. Tube powder material finished product.

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Abstract

The invention discloses a preparation method of a tungsten trioxide nanotube. The preparation method comprises the following technological steps: firstly, paving hexacarbonyl tungsten at the bottom ofa ceramic crucible, then downward putting an opening of a porous anodic alumina template above the hexacarbonyl tungsten, sealing the crucible, then putting the crucible into a tubular furnace for heating, and carrying out low-temperature sublimation to form deposited hexacarbonyl tungsten; continuously heating and pyrolyzing to form deposited metal tungsten; secondly, continuously heating and enabling the deposited hexacarbonyl tungsten in the first step to be deposited and oxidized; thirdly, removing the porous anodic alumina template by using a dilute acid solution, then carrying out suction filter treatment, and drying to obtain a finished product. The method disclosed by the invention has the advantages of simple steps, no environmental pollution and no need of complex equipment; theprepared tungsten trioxide nanotube powder material has the advantages of high size controllability, good crystallinity and uniform tube wall and morphology of the nanotube, thereby greatly improvingoverall performance of a finished product of the tungsten trioxide nanotube powder material. The preparation method disclosed by the invention has wide applicability and facilitates large-scale industrial production.

Description

technical field [0001] The invention relates to the field of inorganic nanometer materials, in particular to a method for preparing inorganic nanotubes. Background technique [0002] Tungsten trioxide (WO 3 ) is an important n-type semiconductor functional material with stable chemical properties and functions such as photochromism, electrochromism, photocatalysis, and high sensitivity to gases. It has great application prospects in the fields of information display devices, light-adjusting devices, gas sensors, photoelectric sensors, catalysts for organic reactions, and battery cathode materials. In order to further utilize the excellent properties of tungsten trioxide and broaden its application fields, the best technical approach is to reduce its grain size, so the preparation of one-dimensional tungsten trioxide materials has attracted people's attention, especially the one-dimensional Tungsten oxide material. [0003] Lakshmi et al. prepared tungsten oxide nanowires ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G41/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G41/02C01P2004/13Y02P20/10
Inventor 胡柱东林海敏
Owner FOSHAN UNIVERSITY
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