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Preparation method of vanadium dioxide film

A vanadium dioxide and thin film technology is applied in the field of preparation of vanadium dioxide thin films to achieve the effects of good optical control performance, low price and low toxicity

Inactive Publication Date: 2014-06-18
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, few literatures have reported the use of vanadium peroxo complexes to prepare VO 2 film

Method used

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  • Preparation method of vanadium dioxide film
  • Preparation method of vanadium dioxide film
  • Preparation method of vanadium dioxide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 2.10 grams of citric acid to 50 milliliters of hydrogen peroxide with a mass fraction of 30%, adjust the pH value to 10 with ammonia water, place the above solution in an ice-water bath, slowly add 1.63 grams of vanadyl sulfate, stir for 2 hours, add 50 Milliliter of ethanol and let it stand for 4 hours, the resulting precipitate was separated by filtration to obtain the peroxo complex of vanadium.

[0038] The Raman spectrum of the product obtained in this embodiment is as follows figure 1 Shown: at 885cm -1 、608cm -1 、526cm -1 The peak at is the characteristic peak of peroxy group, shows that contains peroxy group in the product. 971cm -1 The peak at is the characteristic peak of the V=O bond.

[0039] The infrared spectrum of the product obtained in this embodiment is as follows figure 2 Shown: at 870cm -1 、610cm -1 、523cm -1 The peak at is the characteristic peak of the peroxy group, 950cm -1 The peak at is the characteristic peak of the V=O bond.

...

Embodiment 2

[0047] Dissolve 20 ml of hydrogen peroxide with a mass fraction of 30% in 80 ml of water, add 1.08 g of tartaric acid, adjust the pH value to 12 with ammonia water, place the above solution in an ice-water bath, slowly add 0.78 g of vanadyl sulfate, and stir After 4 hours, 120 ml of isopropanol was added and allowed to stand for 8 hours, and the resulting precipitate was separated by filtration to obtain a vanadium peroxy complex.

[0048] Utilize Raman, infrared spectrum to analyze the product obtained in this embodiment, the characteristic peak of peroxyl group appears in both infrared spectrum and Raman spectrum, so it is confirmed that it contains peroxyl group.

Embodiment 3

[0050] In 50 milliliters of hydrogen peroxide with a mass fraction of 30%, add 2.40 grams of malic acid, adjust the pH value to 14 with ammonia water, place the above solution in an ice-water bath, slowly add 1.96 grams of vanadyl sulfate, and stir for 4 hours. After adding 80 milliliters of acetone, the mixture was allowed to stand for 6 hours, and the resulting precipitate was separated by filtration to obtain a peroxo complex of vanadium.

[0051] Utilize Raman, infrared spectrum to analyze the product obtained in this embodiment, the characteristic peak of peroxyl group appears in both infrared spectrum and Raman spectrum, so it is confirmed that it contains peroxyl group.

[0052] The obtained product of embodiment 2 and 3 is through elemental analysis, and its obtained product composition meets general formula V 2 N 3±x h 14±y o 11±z , where the values ​​of x, y, and z are all between 0-1.

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Abstract

The invention discloses a preparation method of a vanadium dioxide film, comprising the following steps: 1) dissolving carboxylic acid with hydroxyl in hydrogen peroxide, regulating pH value of the solution with ammonia water to be more than 7; adding vanadyl sulfate in the solution to obtain a reaction solution; after the completion of the reaction, adding an organic solvent in the solution, standing to generate precipitate, separating the precipitate from the solution to obtain peroxide complex of vanadium; 2) dissolving the obtained peroxide complex of vanadium obtained in the step 1) and an additive in water to form a water solution, coating the water solution on a substrate, carrying out thermal treatment under the inert atmosphere to obtain the vanadium dioxide film. According to the preparation method of vanadium dioxide film, the related techniques are simple and the obtained film has excellent optical control performance. The vanadium dioxide film can be applied to fields including intelligent temperature control coatings, light activated switches and memories, etc.

Description

technical field [0001] The invention relates to a method for preparing a vanadium dioxide thin film, belonging to the field of functional thin film materials. Background technique [0002] Vanadium dioxide will undergo a reversible phase transition around 68°C, and when it is higher than 68°C, VO 2 It is the R phase of the rutile structure, and it is the M phase of the monoclinic structure when it is lower than 68 ° C. During the transformation process between the R phase and the M phase, VO 2 Physical properties such as optical transmittance, resistivity, and magnetic susceptibility will also undergo reversible mutations, such as infrared light passing through VO 2 The transmittance of the film changes with temperature: the transmittance is low when it is higher than 68°C, and the transmittance is high when it is lower than 68°C, but the transmittance of visible light basically does not change with temperature. Using these characteristics, VO 2 The film can be used to coa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/23
Inventor 高彦峰刘新玲康利涛罗宏杰金平实
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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